Journal articles: 'Coupling Facility'

1

Walker, Jonathan A., Jason D. Frieman, Mitchell L. R. Walker, Vadim Khayms, David King, and Peter Y. Peterson. "Electrical Facility Effects on Hall-Effect-Thruster Cathode Coupling: Discharge Oscillations and Facility Coupling." Journal of Propulsion and Power 32, no. 4 (July 2016): 844–55. http://dx.doi.org/10.2514/1.b35835.

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Matsui, Y., Y. Itahashi, M. Shimizu, and H. Tsuji. "Irradiation–coupling techniques using JMTR and another facility." Journal of Nuclear Materials 283-287 (December 2000): 997–1000. http://dx.doi.org/10.1016/s0022-3115(00)00347-0.

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Chang, Tieqiang, Yongkun Ding, Dongxian Lai, Tianxuan Huan, Shaoping Zhu, Zhijian Zheng, Guangyu Wang, et al. "Laser hohlraum coupling efficiency on the Shenguang II facility." Physics of Plasmas 9, no. 11 (November 2002): 4744–48. http://dx.doi.org/10.1063/1.1516781.

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Bailey, N. Y., C. Lusty, and P. S. Keogh. "Nonlinear flexure coupling elements for precision control of multibody systems." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 474, no. 2218 (October 2018): 20180395. http://dx.doi.org/10.1098/rspa.2018.0395.

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Conventional multibody systems used in robotics and automated machinery contain bearing components that exhibit complex and uncertain tribological characteristics. These limit fundamentally the precision of the automated motion and also cause wear. Replacing traditional bearing joints with flexure couplings eliminates these tribological effects, together with wear, reducing necessary system maintenance and offering a potential for increased motion precision. A flexure-coupled multibody system is considered and a novel general solution technique is presented. Derivation of a large deflection flexure coupling model is provided and subsequently validated using an experimental facility. A focused study of a unique double-flexure-coupling rigid body system is given; the formulated nonlinear mathematical model can be used for feedforward control. Equivalent control is also applied to a corresponding system with traditional bearing joints. The feasibility of replacing bearing joints by flexure couplings is demonstrated in terms of accurate large displacement control and reduction of high-frequency disturbances.

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Josten, J. W., C. Mohan, I. Narang, and J. Z. Teng. "DB2's use of the coupling facility for data sharing." IBM Systems Journal 36, no. 2 (1997): 327–51. http://dx.doi.org/10.1147/sj.362.0327.

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Sun, Lijun, Yue Zhao, Xia Wu, and Zengqiang Chen. "A comprehensive decoupling active disturbance rejection control for a gas flow facility." Transactions of the Institute of Measurement and Control 41, no. 2 (April 19, 2018): 297–310. http://dx.doi.org/10.1177/0142331218755578.

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Based on the linear active disturbance rejection control (LADRC), a comprehensive decoupling controller for gas flow facilities is presented to guarantee stability and a fast response during the process of gas flowmeter performance tests. First, a mathematical model is developed to describe the pressure-flow coupling system. Then, a step response method is applied to identify parameters of this model. To realize the effective decoupling control, the static coupling part is introduced into the LADRC design. The overall effect of the dynamic coupling part among two channels, the internal uncertainties and the external disturbance, are treated as total disturbance, which is estimated using the extended state observer and cancelled out by the control law. After estimating and cancelling, the pressure-flow coupling system can be transformed into two single input single output subsystems with the form of cascade integrators. Then two proportional differential controllers are applied to control the two simplified subsystems. Simulation and experimental results show that the proposed algorithm has a shorter settling time, a more effective decoupling effect and a greater capability of disturbance rejecting and stronger performance robustness in gas flow facility than conventional proportional–integral–derivative algorithms.

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Goncharov, Alexander F., Irina Chuvashova, Cheng Ji, and Ho-kwang Mao. "Intermolecular coupling and fluxional behavior of hydrogen in phase IV." Proceedings of the National Academy of Sciences 116, no. 51 (December 3, 2019): 25512–15. http://dx.doi.org/10.1073/pnas.1916385116.

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We performed Raman and infrared (IR) spectroscopy measurements of hydrogen at 295 K up to 280 GPa at an IR synchrotron facility of the Shanghai Synchrotron Radiation Facility (SSRF). To reach the highest pressure, hydrogen was loaded into toroidal diamond anvils with 30-μm central culet. The intermolecular coupling has been determined by concomitant measurements of the IR and Raman vibron modes. In phase IV, we find that the intermolecular coupling is much stronger in the graphenelike layer (G layer) of elongated molecules compared to the Br2-like layer (B layer) of shortened molecules and it increases with pressure much faster in the G layer compared to the B layer. These heterogeneous lattice dynamical properties are unique features of highly fluxional hydrogen phase IV.

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Orjuela-Castro, Javier Arturo, Lizeth Andrea Sanabria-Coronado, and Andrés Mauricio Peralta-Lozano. "Coupling facility location models in the supply chain of perishable fruits." Research in Transportation Business & Management 24 (September 2017): 73–80. http://dx.doi.org/10.1016/j.rtbm.2017.08.002.

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Surman, D. H. "The IBM z Systems Coupling Facility exploitation of storage-class memory." IBM Journal of Research and Development 59, no. 4/5 (July 2015): 8:1–8:9. http://dx.doi.org/10.1147/jrd.2015.2430052.

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Manes, K. R., O. C. Barr, E. S. Bliss, R. P. Drake, R. O. Godwin, D. G. Gritton, J. S. Hildum, et al. "Novette facility: activation and experimental results." Laser and Particle Beams 3, no. 2 (May 1985): 173–88. http://dx.doi.org/10.1017/s0263034600001373.

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From the neodymium glass laser system Novette with two beams of 74 cm diameter and 18 kJ energy per pulse output in the nanosecond range, the design, the steps of the construction, and results of the system are reported. The two beams are synchronized to 5 psec and conversion to green light up to 78% has been realized. Conversion to four times the laser frequency is measured with more than 25% conversion. Simulation and measurement of laser beam properties at several locations permit an analysis to define the final Nova configuration. About half of Novette's experiments were to study short wave length laser–plasma interactions for the then better coupling by inverse bremsstrahlung mechanisms for inertial confinement fusion with laser intensities up to 1017W/cm2. Experiments were divided between high density implosion research and non-local thermodynamic equilibrium plasma conditions.

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Alam, Sher, Subhasish Behera, Satendra Kumar, and Shibananda Sahoo. "Constraining capability of Zγh production at the ILC." International Journal of Modern Physics A 32, no. 02n03 (January 25, 2017): 1750017. http://dx.doi.org/10.1142/s0217751x17500178.

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Higgs boson couplings with gauge bosons are probed through [Formula: see text] in an effective Lagrangian framework. For this study, the beam polarization facility at the ILC along with the typical center-of-mass energy of 500 GeV is considered. The reach of the ILC with an integrated luminosity of 300 fb[Formula: see text] in the determination of CP-conserving parameters is obtained. Sensitivity of the probe of each of these couplings in the presence of other couplings is investigated. The most influential coupling parameters are [Formula: see text]. Other parameters of significant effect are [Formula: see text] and [Formula: see text]. A detailed study of the various kinematic distributions represents possibilities to disentangle the effect of some of these couplings.

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Angelucci, M., D. Martelli, G. Barone, I. Di Piazza, and N. Forgione. "STH-CFD Codes Coupled Calculations Applied to HLM Loop and Pool Systems." Science and Technology of Nuclear Installations 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/1936894.

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This work describes the coupling methodology between a modified version of RELAP5/Mod3.3 and ANSYS Fluent CFD code developed at the University of Pisa. The described coupling procedure can be classified as “two-way,” nonoverlapping, “online” coupling. In this work, a semi-implicit numerical scheme has been implemented, giving greater stability to the simulations. A MATLAB script manages both the codes, oversees the reading and writing of the boundary conditions at the interfaces, and handles the exchange of data. A new tool was used to control the Fluent session, allowing a reduction of the time required for the exchange of data. The coupling tool was used to simulate a loop system (NACIE facility) and a pool system (CIRCE facility), both working with Lead Bismuth Eutectic and located at ENEA Brasimone Research Centre. Some modifications in the coupling procedure turned out to be necessary to apply the methodology in the pool system. In this paper, the comparison between the obtained coupled numerical results and the experimental data is presented. The good agreement between experiments and calculations evinces the capability of the coupled calculation to model correctly the involved phenomena.

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Andrea, Pucciarelli, Galleni Francesco, Moscardini Marigrazia, Martelli Daniele, and Forgione Nicola. "STH/CFD Coupled Simulation of the Protected Loss of Flow Accident in the CIRCE-HERO Facility." Applied Sciences 10, no. 20 (October 10, 2020): 7032. http://dx.doi.org/10.3390/app10207032.

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The paper presents the application of a coupling methodology between Computational Fluid Dynamics (CFD) and System Thermal Hydraulic (STH) codes developed at the University of Pisa. The methodology was applied to the CIRCE-HERO facility in order to reproduce the recently performed experimental conditions simulating a Protected Loss Of Flow Accident (PLOFA). The facility consists of an internal loop, equipped with a fuel pin simulator and a steam generator, and an external pool. In this coupling application, the System code RELAP5 is adopted for the simulation of the internal loop while the CFD code ANSYS Fluent is used for the sake of simulating the pool. The connection between the two addressed domains is provided at the inlet and outlet section of the internal loop; a thermal coupling is also performed in order to reproduce the observed thermal stratification phenomenon. The obtained results are promising and a good agreement was obtained for both the mass flow rates and temperature measurements. Capabilities and limitations of the adopted coupling technique are discussed in the present paper also providing suggestions for improvements and developments to be achieved in the frame of future applications.

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14

Frieman, Jason D., Jonathan A. Walker, Mitchell L. R. Walker, Vadim Khayms, and David Q. King. "Electrical Facility Effects on Hall Thruster Cathode Coupling: Performance and Plume Properties." Journal of Propulsion and Power 32, no. 1 (January 2016): 251–64. http://dx.doi.org/10.2514/1.b35683.

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15

Wang, Yue Gang, Zhao Yang Zuo, Jian Guo Wu, and Hai Bo Li. "Dynamics Simulation Analysis of Centrifuge Facility-Vibration Shaker System Virtual Mocking Based on Flexible Centrifuge Arm." Applied Mechanics and Materials 427-429 (September 2013): 266–70. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.266.

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In order to study the dynamic characteristics of centrifuge facility-vibration shaker system, In the establishment of centrifuge facility-vibration shaker system multi-body dynamic model based on virtual mocking technology, the virtual dynamic model of the entire centrifuge facility-vibration shaker system more close to reality is built up by the transmission of finite element of flexible centrifuge arm. This paper describes how to build the 3-D virtual prototype of centrifuge facility-vibration shaker system by using Pro/e and ADAMS software, and how to create the modal neutral file of the centrifuge arm by using ANSYS software. Considering the system as a rigid-flexible coupling system, the dynamical simulation is carried out, and the results are benefit for the further research of its kinetic behavior, dynamic and variable characteristics basis and the design of such system.

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16

CARUSO, A., C. STRANGIO, S. Yu GUS'KOV, and V. B. ROZANOV. "Interaction experiments of laser light with low density supercritical foams at the AEEF ABC facility." Laser and Particle Beams 18, no. 1 (January 2000): 25–34. http://dx.doi.org/10.1017/s0263034600181042.

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Experiments have been performed on the interaction physics of laser light with polystyrene and agar–agar foams having average densities higher than critical. The experiments have been performed at the ABC facility of the Associazione EURATOM-ENEA sulla Fusione, in Frascati. The main addressed topics have been energy coupling (balance), diffusion of energy into the target, plasma and dense phase dynamics, and harmonics generation. The laser light (λ = 1.054 μm) was focused by a F/1 lens to produce on the target surface about 1.6 × 1014 W/cm2 (≈1015 W/cm2 in the waist, set about 100 μm inside the target). Experiments have shown efficient energy coupling (>80%) to be attributed to cavity formation in the low density foam (efficient light absorption) and good mechanical coupling of the plasma trapped in the cavity to the dense phase (ablation pressure work). Heat diffusion possibly plays a transitory role in the initial stages of the interaction (300–500 ps). Time integrated harmonics measurements revealed a blue-shifted 2ω and a red-shifted 5/2ω.

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17

Cui, Wenhui, Jianqiang Zhu, Zhigang Liu, Quantang Fan, Zhaoyang Jiao, Junyong Zhang, Weiheng Lin, and Ziming Dong. "Optomechanical Coupling Active Control for Improving Beam Pointing Accuracy of the Spatial Filter in PW Laser Facility." Applied Sciences 11, no. 11 (May 28, 2021): 5017. http://dx.doi.org/10.3390/app11115017.

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To improve the beam pointing accuracy of PW laser facility and reduce the optical axis deviation caused by the deflection amplitude response deviation of the confocal lens of spatial filter for microvibration action, an Optomechanical coupling vibration active control theory is proposed to make the peak value of output optical angle response lower than the pointing threshold value by 0.2 μrad. To establish an Optomechanical coupling vibration active control system, the active control parameters are introduced into the beam transmission matrix of the Optomechanical coupling system. The active control parameters and the peak value of the output light angle response are linked point to point. The algorithm flow of the active control system is designed, the control rules are established, and the control effect is verified. The results show that the peak value of the output optical angle response of the spatial filter decreases by 98.13%, and the attenuation is nearly two orders of magnitude after the active control, which effectively improves the convergence accuracy of the beam pointing of the spatial filter of the PW laser facility, and realizes the beam pointing control under the broadband excitation, and the control result is consistent with the expectation.

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18

Rottenbach, Andreas, T. Uhl, A. Hain, A. Scharf, K. Kritzler, and W. Kretschmer. "Development of a fraction collector for coupling gas chromatography with an AMS facility." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 266, no. 10 (May 2008): 2238–41. http://dx.doi.org/10.1016/j.nimb.2008.03.052.

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19

Lin Weiheng, 林炜恒, 朱健强 Zhu Jianqiang, and 任磊 Ren Lei. "Advances in Target Alignment and Beam-Target Coupling Technologies of Laser Fusion Facility." Chinese Journal of Lasers 47, no. 4 (2020): 0400001. http://dx.doi.org/10.3788/cjl202047.0400001.

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20

Hall, E. J. "Aerodynamic modelling of multistage compressor flow fields Part 1: Analysis of rotor-stator-rotor aerodynamic interaction." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 212, no. 2 (February 1, 1998): 77–89. http://dx.doi.org/10.1243/0954410981532153.

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The primary purpose of this study was to investigate improved numerical techniques for predicting flows through multistage compressors. The vehicle chosen for this study was the Pennsylvania State University Research Compressor (PSRC). The PSRC facility consists of a 3 1/2-stage axial flow compressor which shares design features which are consistent with embedded stages of modern gas turbine engine axial flow compressors. In Part 1 of this two-part paper, several computational fluid dynamics techniques were applied to predict both steady and unsteady flows through the PSRC facility. Interblade row coupling via a circumferentially averaged mixing-plane approach was employed for steady flow analysis. A mesh density sensitivity study was performed to define the minimum mesh requirements necessary to achieve reasonable agreement with the experimental data. Time-dependent flow predictions were performed using a time-dependent interblade row coupling technique. These calculations evaluated the aerodynamic interactions occurring between rotor 2, stator 2 and rotor 3 for the PSRC rig.

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21

Guo, Qing, and Dan Jiang. "Coordinated Control Method of the Portable Facility for Bearing Load Based on Human Electromechanical Coupling." Applied Mechanics and Materials 224 (November 2012): 429–34. http://dx.doi.org/10.4028/www.scientific.net/amm.224.429.

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This paper has introduced electromechanical coupling characteristics in portable facility for bearing load, considered model ,according to legs supporting gait when people walking, established the load torque compensation model , and a mathematical model of knee position control system which is made of the servo valve, hydraulic cylinders and other hydraulic components, designed hydraulic cylinder position control loop in case of existing load force interference compensation, and used the method of combining the PID and lead correction network for frequency domain design ,ensured system to meet a certain stability margin. The simulation results show that this position control method can servo on the knee angular displacement of normal human walking, reached a certain portable facility bearing load and assistant power effect, at the same time, met the needs of human-machine coordinated motion.

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Yang, Guoyong, Hongguang Wang, Jizhong Xiao, Zuowei Wang, and Lie Ling. "Research on a Hierarchical and Simultaneous Gravity Unloading Method for Antenna Pointing Mechanism." Mechanical Sciences 8, no. 1 (March 20, 2017): 51–63. http://dx.doi.org/10.5194/ms-8-51-2017.

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Abstract. This paper presents a hierarchical and simultaneous gravity unloading method. An air bearing gravity unloading facility for two-orthogonal-axis antenna pointing mechanism (APM) is designed based on this method. This method is proposed based on the characteristics analysis of the two-orthogonal-axis APM and air bearings. The mechanism of the hierarchical and simultaneous gravity unloading method is described in detail. It solves the coupling problem of two axes and unloads the gravity of both joints hierarchically and simultaneously. The air bearing gravity unloading facility which is a structure mechanism with two layers based on this method is designed with planar air bearing and air spindle. The structure of the facility is described in detail. The dynamic models of the APM with its load in space environment and on the air bearing gravity unloading facility are derived respectively. With the analysing of the driving torques and vertical forces of the APM joints in both models, the results demonstrate that the gravity unloading facility can simulate the microgravity environment successfully. This conclusion is also proved by the dynamic simulation with ADAMS software. The simulation also provides some optimization targets for the gravity unloading facility. At last, the gravity unloading facility is established and some experiments are done. The dynamic models, the simulation results and the experiments all show the effectiveness of the hierarchical and simultaneous gravity unloading method.

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23

CHENG, Ningbo. "Kinematic Coupling Problem of the Target-positioning System of the Laser Facility for ICF." Journal of Mechanical Engineering 52, no. 11 (2016): 63. http://dx.doi.org/10.3901/jme.2016.11.063.

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Lacroix, B., B. Rousset, H. Cloez, P. Decool, J. L. Duchateau, C. Hoa, N. Luchier, S. Nicollet, and F. Topin. "Using the HELIOS facility for assessment of bundle-jacket thermal coupling in a CICC." Cryogenics 80 (December 2016): 374–84. http://dx.doi.org/10.1016/j.cryogenics.2016.05.007.

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25

Segal, C., and C. D. Young. "Development of an Experimentally Flexible Facility for Mixing-Combustion Interactions in Supersonic Flow." Journal of Energy Resources Technology 118, no. 2 (June 1, 1996): 152–58. http://dx.doi.org/10.1115/1.2792707.

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A new experimental facility has been designed, built and calibrated to support research topics involving supersonic mixing and combustion and will be used to investigate: 1) molecular level mixing; 2) mixing-combustion coupling effects for gaseous and liquid fuels; and 3) atomization, droplet break-up, mixing, and combustion of high-energy/high-density slurry fuels in a supersonic airstream. The facility simulates flight enthalpies corresponding to altitudes between 26 and 36 km and flight Mach numbers up to 4.755. The major features of this facility are the geometric flexibility of the test section configuration, of the fuel injection, and of the experimental conditions, enabling the investigation of a broad range of topics. Parallel and transverse injection, independently controlled in four regions, is available. The construction of the test section is modular and the entrance Mach numbers can be varied between 1.6 and 3.6. An experimental program to define the test flow at the entrance of the facility’s test section is presented with emphasis on the test section entrance ture distribution and calibration. Selected research topics currently being investigated are summarized to highlight the usefulness of the present facility.

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26

Shevchenko, V. "SHiP project as a new facility at intensity frontier." EPJ Web of Conferences 191 (2018): 02001. http://dx.doi.org/10.1051/epjconf/201819102001.

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SHiP (Search for Hidden Particles) is a new general purpose fixed target facility suggested for SPS accelerator at CERN. The experiment is currently in Comprehensive Design Report preparation phase, aiming to become a part of European Strategy for Particle Physics update in 2019. In the initial phase of SHiP, the 400 GeV proton beam extracted from the SPS will be dumped on a heavy target producing 2 × 1020 protons on target in 5 years. A dedicated detector, based on a long vacuum tank followed by a spectrometer and particle identification detectors, will allow probing a variety of models with light long-lived exotic particles and masses below O(10) GeV/c2. The main focus will be the physics of the so-called Hidden Portals, i.e. search for Dark Photons, Light scalars and Heavy Neutrinos. The sensitivity to Heavy Neutrinos will allow for the first time to probe, in the mass range between the kaon and the charm meson mass, a coupling range for which Baryogenesis and active neutrino masses could be explained simultaneously. Another dedicated detector will allow the study of tau-neutrino physics.

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27

Liu, Xiao, Ming Xie, Da Bo Li, and Jin Yuan Li. "A Method to Calculate the Net Power Delivered into a TEM Cell Using a Directional Coupler in a Probe Calibration Application." Applied Mechanics and Materials 475-476 (December 2013): 23–26. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.23.

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In a probe calibration facility employing the TEM cell as the field generator, a method to calculate the net power delivered into the TEM cell is presented through monitoring the coupling power of the directional coupler. The new formula requires the effective reflection coefficient of the dual coupler and takes into consideration the directivity of the coupler, the mismatch between the coupler and the TEM cell, the mismatch between the power sensor and the coupling port of the coupler. The formula can provide sufficient accuracy in calibration purpose application using a TEM cell with a coupler combined with power sensors to monitor the net power.

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Jeong, In-Jae, and V. Jorge Leon. "Distributed allocation of the capacity of a single-facility using cooperative interaction via coupling agents." International Journal of Production Research 41, no. 1 (January 2003): 15–30. http://dx.doi.org/10.1080/00207540210164640.

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Rabehl, Roger, Ruben Carcagno, Shlomo Caspi, Allan DeMello, Lidija Kokoska, Darryl Orris, Heng Pan, Cosmore Sylvester, and Michael Tartaglia. "Thermal and Mechanical Performance of the First MICE Coupling Coil and the Fermilab Solenoid Test Facility." IEEE Transactions on Applied Superconductivity 25, no. 3 (June 2015): 1–4. http://dx.doi.org/10.1109/tasc.2014.2367155.

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Nourelfath, M., N. Nahas, and B. Montreuil. "Coupling ant colony optimization and the extended great deluge algorithm for the discrete facility layout problem." Engineering Optimization 39, no. 8 (December 2007): 953–68. http://dx.doi.org/10.1080/03052150701551461.

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Serafin, D., J. L. Lasserre, J. Bolomey, G. Cottard, P. Garreau, F. Lucas, and F. Therond. "Spherical near-field facility for microwave coupling assessments in the 100 MHz-6 GHz frequency range." IEEE Transactions on Electromagnetic Compatibility 40, no. 3 (1998): 225–34. http://dx.doi.org/10.1109/15.709420.

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Xue, Bin Xia, Zhi Qing Zhao, and Li Wei. "Research on Coupling Design of Rainwater Harvesting System Under the Urban Planning Frame." Advanced Materials Research 347-353 (October 2011): 2979–84. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.2979.

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The collection and utilization of urban rainwater is currently a substantial measure of ecological construction in the city which covers a variety of technologies used and reflected in the multi-dimensional overlap with the urban space. By analyzing the current trends in related technology in the world, the paper probes the organic integration of rainwater collected system with urban spatial structure and elements in a view of overall optimization. Then the paper proposes to set up the coupled design pattern for urban rainwater recycling system in a way of district division, facility grading and rainwater classification according to the characteristics of land use mode and urban planning frame.

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Freelon, Byron, Kamlesh Suthar, and Jan Ilavsky. "A multi-length-scale USAXS/SAXS facility: 10–50 keV small-angle X-ray scattering instrument." Journal of Applied Crystallography 46, no. 5 (September 18, 2013): 1508–12. http://dx.doi.org/10.1107/s0021889813021900.

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Coupling small-angle X-ray scattering (SAXS) and ultra-small-angle X-ray scattering (USAXS) provides a powerful system of techniques for determining the structural organization of nanostructured materials that exhibit a wide range of characteristic length scales. A new facility that combines high-energy (HE) SAXS and USAXS has been developed at the Advanced Photon Source (APS). The application of X-rays across a range of energies, from 10 to 50 keV, offers opportunities to probe structural behavior at the nano- and microscale. An X-ray setup that can characterize both soft matter or hard matter and high-Zsamples in the solid or solution forms is described. Recent upgrades to the Sector 15ID beamline allow an extension of the X-ray energy range and improved beam intensity. The function and performance of the dedicated USAXS/HE-SAXS ChemMatCARS-APS facility is described.

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Bench, M. W., I. M. Robertson, and M. A. Kirk. "The formation and recrystallization of amorphous zones produced in GaAS by ion irradiation." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 460–61. http://dx.doi.org/10.1017/s0424820100104364.

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Transmission electron microscopy experiments have been performed to investigate the lattice damage created by heavy-ion bombardments in GaAs. These experiments were undertaken to provide additional insight into the mechanisms by which individual amorphous zones and eventually amorphous layers are created. To understand these mechanisms, the structure of the defects created as a function of material, irradiating ion, dose, dose rate, and implantation tenperature have been studied using TEM. Also, the recovery of the crystalline structure by annealing has been investigated.These experiments were performed at the High-Voltage Electron Microscope - Ion Accelerator Facility at Argonne National Laboratory. This facility consists of an HVEM which has been interfaced with two ion accelerators. This coupling, plus the availability of several specimen stages permits ion irradiations to be performed in the specimen chamber of the microscope at controlled temperatures from 10 to 1000 K.

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Hicks, K. H., and D. Keller. "PHOTOPRODUCTION OF THE Σ*- RESONANCE FROM THE NEUTRON." International Journal of Modern Physics E 19, no. 12 (December 2010): 2363–68. http://dx.doi.org/10.1142/s0218301310016818.

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Data for the reaction [Formula: see text] was measured at the LEPS detector using a linearly polarized photon beam produced by laser-backscattering at the SPring-8 facility. The cross sections are in good agreement with predictions from a theoretical model by Oh, Ko and Nakayama. This model, which uses SU (3) flavor symmetry, suggests that the coupling constants for strange-particle production in the baryon decuplet can be predicted with reasonable accuracy using this symmetry.

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del Moral, Amanda, and Fontina Petrakopoulou. "Evaluation of the Coupling of a Hybrid Power Plant with a Water Generation System." Applied Sciences 9, no. 23 (November 20, 2019): 4989. http://dx.doi.org/10.3390/app9234989.

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This paper presents the design and analysis of an energy/water system that combines a 20 MW hybrid concentrated solar/biomass power plant with an advanced wastewater treatment facility. Designed to be installed in one of the most demanding areas of the Iberian Peninsula, the Spanish region of Andalusia, this plant seeks to provide the area with potable water and electricity. The solar block works with a mixture of molten salts, while the biomass backup system of the power plant uses olive pomace. The implementation of a direct potable reuse facility further enhances the sustainability of the project. Urban sewage from the region is collected and passed through a series of purification procedures in order to generate potable water ready to be directly blended into the water distribution system. A sensitivity analysis is conducted to determine the feasibility of the co-generation of electricity and water in the area. With a capacity factor of 85% and an annual operation of 7,446 hours, the hybrid solar/biomass power plant generates 148.92 GWh. Exergetic analyses have been realized for two extreme cases: exclusive use of the solar block and exclusive use of the biomass system. An overall plant exergetic efficiency of 15% is found when the solar block is used and an efficiency of 34% is calculated when the biomass support system is used. Following an economic analysis, a total investment of 211,526,000 € is required for the full implementation of the system with a resulting levelized cost of energy of 0.25 €/kWh. We find that the selling price of the generated potable water which makes the plant operation economically viable is found to be 14.61 €/m3. At present, this price seems relatively high in view of current conditions; yet it is expected to become more realistic under future heightened water scarcity conditions, especially in arid regions.

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Hinkel, D. E., M. B. Schneider, H. A. Baldis, G. Bonanno, D. E. Bower, K. M. Campbell, J. R. Celeste, et al. "Laser coupling to reduced-scale hohlraum targets at the Early Light Program of the National Ignition Facility." Physics of Plasmas 12, no. 5 (May 2005): 056305. http://dx.doi.org/10.1063/1.1880012.

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Ma, Y., W. K. Van Moorhem, and R. W. Shorthill. "An Innovative Method of Investigating the Role of Turbulence in the Velocity Coupling Phenomenon." Journal of Vibration and Acoustics 112, no. 4 (October 1, 1990): 550–55. http://dx.doi.org/10.1115/1.2930141.

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An investigation has been conducted of the velocity coupling phenomenon reported in acoustically unstable solid propellant rocket motors. An innovative simulation facility has been built using solid carbon dioxide as the simulated propellant. The use of dry ice allows us to focus directly on the fluid mechanical aspect of the problem. Dry ice is contained in a two-meter long chamber. The acoustic disturbance in the chamber is introduced by means of a mechanically driven piston. Mass flow rate and acoustic pressure measurements indicate the existence of a coupling mechanism, other than pressure coupling, between the acoustic disturbance and dry ice sublimation process. Flow visualization using a high speed camera shows a high degree of mixing, near resonance, within the flow above the dry ice surface. The flow over the dry ice is very chaotic, probably turbulent. Hot film anemometry measurements show a broad-band spectrum at low frequencies with strong peaks at the driving frequency and its harmonics near resonance. A broad band spectrum is generally taken as an indication of turbulent flow. Acoustically induced turbulent forced convection is believed to be responsible for the increase in the sublimation rate of the dry ice (simulated burning of the propellant). We believe that turbulence is one of the principal mechanisms in the velocity coupling phenomenon.

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Yelenskiy, Aleksandr, MinHee K. Ko, Edward R. Chu, Jose M. Gonzalez, Kimberly Siegmund, and James C. Tan. "Total Outflow Facility in Live C57BL/6 Mice of Different Age." Biomedicine Hub 2, no. 3 (November 17, 2017): 1–10. http://dx.doi.org/10.1159/000484126.

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Purpose: To characterize total outflow facility across the live adult mouse lifespan as a reference for mouse glaucoma studies and the common C57BL/6 background strain. Methods: Microperfusion was performed by single-needle cannulation and feedback-controlled coupling of pressure and flow to maintain a constant pressure in the anterior chambers of live C57BL/6NCrl mice aged 3-4 months (n = 17), 6-9 months (n = 10), and 23-27 months (n = 12). This mouse age range represented an equivalent human age range of young adult to elderly. We characterized the following across age groups in vivo: (1) outflow facility based on constant pressure perfusion in a pressure range of 15-35 mm Hg, (2) perfusion flow rates, and (3) anterior segment tissue histology after perfusion. Thirty-nine live mice underwent perfusion. Results: Pressure-flow rate functions were consistently linear for all age groups (all R2 > 0.96). Total outflow facility in mice aged 3-4, 6-9, and 23-27 months was 0.0066, 0.0064, and 0.0077 μL/min/mm Hg, respectively. Facility was not significantly different between age groups (all p > 0.4). The groups had closely overlapping frequency distribution profiles with right-sided tails. Post hoc estimates indicated that group facility differences of at least 50% would have been detectable, with this limit set mainly by inherent variability in the strain. A trend toward higher perfusion flow rates was seen in older mice aged 23-27 months, but this was not significantly different from that of mice aged 3-4 months or 6-9 months (p > 0.2). No histological disruption or difference in iridocorneal angle or drainage tissue structure was seen following perfusion in the different age groups. Conclusion: We did not find a significant difference in total outflow facility between different age groups across the live C57BL/6 mouse adult lifespan, agreeing with some human studies. The possibility that more subtle differences might exist ought to be judged with respect to the heterogeneity in facility at different ages. Our findings provide reference data for live perfusion studies pertaining to glaucoma involving the C57BL/6 strain.

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Song, Hyo-Jong, Craig R. Ferguson, and Joshua K. Roundy. "Land–Atmosphere Coupling at the Southern Great Plains Atmospheric Radiation Measurement (ARM) Field Site and Its Role in Anomalous Afternoon Peak Precipitation." Journal of Hydrometeorology 17, no. 2 (January 26, 2016): 541–56. http://dx.doi.org/10.1175/jhm-d-15-0045.1.

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Abstract The multimodel Global Land–Atmosphere Coupling Experiment (GLACE) identified the semiarid Southern Great Plains (SGP) as a hotspot for land–atmosphere (LA) coupling and, consequently, land-derived temperature and precipitation predictability. The area including and surrounding the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) SGP Climate Research Facility has in particular been well studied in the context of LA coupling. Observation-based studies suggest a coupling signal that is much weaker than modeled, if not elusive. Using North American Regional Reanalysis and North American Land Data Assimilation System data, this study provides a 36-yr (1979–2014) climatology of coupling for ARM-SGP that 1) unifies prior interdisciplinary efforts and 2) isolates the origin of the (weak) coupling signal. Specifically, the climatology of a prominent convective triggering potential–low-level humidity index (CTP–HIlow) coupling classification is linked to corresponding synoptic–mesoscale weather and atmospheric moisture budget analyses. The CTP–HIlow classification defines a dry-advantage regime for which convective triggering is preferentially favored over drier-than-average soils as well as a wet-advantage regime for which convective triggering is preferentially favored over wetter-than-average soils. This study shows that wet-advantage days are a result of horizontal moisture flux convergence over the region, and conversely, dry-advantage days are a result of zonal and vertical moisture flux divergence. In this context, the role of the land is nominal relative to that of atmospheric forcing. Surface flux partitioning, however, can play an important role in modulating diurnal precipitation cycle phase and amplitude and it is shown that soil moisture and sensible heat flux are significantly correlated with both occurrence and intensity of afternoon peak precipitation.

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Bercu, Vasile, Carlo Andrea Massa, Silvia Pizzanelli, Luca Pardi, Dino Leporini, and Massimo Martinelli. "Glassforming Liquids, Amorphous and Semicrystalline Polymers: Exploring their Energy Landscape and Dynamical Heterogeneity by Multi-frequency High-Field EPR." Applied Magnetic Resonance 51, no. 11 (October 28, 2020): 1591–605. http://dx.doi.org/10.1007/s00723-020-01248-4.

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AbstractWe review past and recent work carried out on viscous liquids, amorphous and semicrystalline polymers by multifrequency high-field electron paramagnetic resonance (HF-EPR) facility in Pisa. The emphasis is on the enhanced ability to provide fine details of the reorientation process of the paramagnetic guest, the spin probe, revealing features driving the dynamics of the host system, including the energy-barrier distribution of glassy polymers, the dynamical heterogeneity of semicrystalline polymers, and the dynamical changes occurring at the critical temperature predicted by the ideal mode-coupling theory.

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COHEN, JOSEPH. "ELECTROMAGNETIC PRODUCTION OF HYPERNUCLEI." International Journal of Modern Physics A 04, no. 01 (January 1989): 1–78. http://dx.doi.org/10.1142/s0217751x89000029.

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We review the results of recent studies and calculations of Λ-hypernuclear excitations via electromagnetic probes [the (e, e′K+) and (γ, K+) reactions]. After discussing the importance of the probe, we present and analyze the theoretical features of a model (based on Feynman diagrams) for studying the process. The special kinematics of the nuclear (e, e′K+) reaction, involving high momentum transfers, is discussed. We then present cross section calculations. Using first a nonrelativistic nuclear structure model, we present results for the exclusive and inclusive electromagnetic hypernuclear excitations and for a large range of nuclear masses. Next, we calculate cross sections using the fully-relativistic form of the transition operator and relativistic Dirac-nuclear-and hypernuclear- structure model. In this context, we analyze the effects of the large scalar and vector potentials of the relativistic model and of the Dirac-spinor wave functions of the proton and the Λ-hyperon, on the calculated quantity. The relativistic-model calculations are presented for both pseudoscalar (PS) and pseudovector (PV) KNΛ vertex couplings and we discuss in detail the different theoretical predictions obtained in the two cases. Throughout the paper, we emphasize several uncertainties regarding the determination of coupling constants, PS vs PV coupling schemes, and relativistic uncertainties. Finally, we present technical and experimental considerations for the study of the (e, e′K+) and (γ, K+) reactions at the continuous electron beam accelerator facility (CEBAF), which is currently under construction in Newport News, Virginia.

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Pulinets, S. A., A. Leyva Contreras, V. Kostoglodov, H. Perez de Tejada, and J. Urrutia-Fucugauchi. "Prevention project: a complex geophysical observatory in Mexico as a test facility for lithosphere–atmosphere–ionosphere coupling models." Physics and Chemistry of the Earth, Parts A/B/C 29, no. 4-9 (January 2004): 657–62. http://dx.doi.org/10.1016/j.pce.2003.09.023.

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Phipps, C. R., M. Boustie, J. M. Chevalier, S. Baton, E. Brambrink, L. Berthe, M. Schneider, L. Videau, S. A. E. Boyer, and S. Scharring. "Laser impulse coupling measurements at 400 fs and 80 ps using the LULI facility at 1057 nm wavelength." Journal of Applied Physics 122, no. 19 (November 21, 2017): 193103. http://dx.doi.org/10.1063/1.4997196.

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Senne, Edson Luiz França, Marcos Antonio Pereira, and Luiz Antonio Nogueira Lorena. "A Decomposition Heuristic for the Maximal Covering Location Problem." Advances in Operations Research 2010 (2010): 1–12. http://dx.doi.org/10.1155/2010/120756.

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This paper proposes a cluster partitioning technique to calculate improved upper bounds to the optimal solution of maximal covering location problems. Given a covering distance, a graph is built considering as vertices the potential facility locations, and with an edge connecting each pair of facilities that attend a same client. Coupling constraints, corresponding to some edges of this graph, are identified and relaxed in the Lagrangean way, resulting in disconnected subgraphs representing smaller subproblems that are computationally easier to solve by exact methods. The proposed technique is compared to the classical approach, using real data and instances from the available literature.

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Storm, E., E. M. Campbell, W. J. Hogan, and J. D. Lindl. "Nova Upgrade Program: Ignition and beyond." Laser and Particle Beams 11, no. 2 (June 1993): 291–98. http://dx.doi.org/10.1017/s0263034600004882.

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The Lawrence Livermore National Laboratory (LLNL) Inertial Confinement Fusion (ICF) Program is addressing the critical physics and technology issues directed toward demonstrating and exploiting ignition and propagating burn to high gain with ICF targets for both defense and civilian applications. Nova is the primary U.S. facility employed in the study of the X-ray-driven (indirect drive) approach to ICF. Nova's principal objective is to demonstrate that laser-driven hohlraums can achieve the conditions of driver-target coupling efficiency, driver irradiation symmetry, driver pulseshaping, target preheat, and hydrodynamic stability required by hot-spot ignition and fuel compression to realize a fusion gain.The LLNL ICF Program believes that the next major step in the national ICF Program is the demonstration of ignition and moderate gain (G ≤ 10). Recent theoretical and experimental results show that the ignition drive energy threshold can be reduced significantly by operating indirectly driven targets at radiation temperatures ∼ 1.3–1.6 times higher (thereby achieving higher implosion velocity) than originally proposed for the Laboratory Microfusion Facility (LMF). (Temperatures of ∼ 1.3 times higher have already been demonstrated on Nova.) Specifically, it should be possible to demonstrate ignition and propagating with burn about 1–2 MJ of laser energy as against the 5–10 MJ necessary for the high-yield LMF. LLNL proposes to upgrade the existing Nova facility to 1–2 MJ (2- to 4-ns pulses) and demonstrate ignition and propagating burn to moderate gain with appropriately scaled hydrodynamic equivalents of high-yield targets.Once moderate gain has been demonstrated at 1–2.0 MJ on the Nova Upgrade, investigations into improving, by about 50%, the coupling efficiency between the driver and the capsule could provide gains >20 at about 1 MJ or less. A database for gain below 1-MJ driver energies could lead to a low-capital-cost Engineering Test Facility (ETF) for a first inertial fusion energy engineering reactor. Because the capital cost for both the target chamber and the driver scale with size, there is the opportunity to realize large savings by lowering the required driver energy necessary to demonstrate the technology for a first demonstration power plant. A target gain, G ∼ 25, at a driver energy, ED ∼ 0.75 MJ, would be self-sustaining for a driver efficiency of ∼10% and a thermal-to-electric conversion efficiency of ∼33% and at 12 Hz would generate ∼10 MW of gross electric power. Although the cost of electricity would be high, the combination of low capital cost and early demonstration of reactor technology would be an attractive step in the development of inertial fusion energy.

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Downs, J. Crawford. "Neural coupling of intracranial pressure and aqueous humour outflow facility: A potential new therapeutic target for intraocular pressure management." Journal of Physiology 598, no. 8 (March 17, 2020): 1429–30. http://dx.doi.org/10.1113/jp279355.

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Callahan, D. A., P. A. Amendt, E. L. Dewald, S. W. Haan, D. E. Hinkel, N. Izurni, O. S. Jones, et al. "Using laser entrance hole shields to increase coupling efficiency in indirect drive ignition targets for the National Ignition Facility." Physics of Plasmas 13, no. 5 (May 2006): 056307. http://dx.doi.org/10.1063/1.2196287.

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Hashempour, Javad, and Ahmad Sharifian. "Optimizing the Coupling of a Firebrand Generator to a Horizontal Wind Tunnel." Advanced Materials Research 726-731 (August 2013): 971–76. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.971.

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Australia is considered as the most fire-prone country in the world. Spotting ignition by lofted firebrands is the main mechanism of fire spread. Many experimental studies have been conducted to evaluate the effect of the firebrand attacks on structures and to identify possible solutions. The experimental facility consists of a firebrand generator coupled to a wind tunnel. The wind speed in the firebrand generator is relatively low, in order to assure a quality continuous flow of glowing firebrands. On the contrary, the wind speed in the wind tunnel is high to duplicate actual firebrand attacks. Previous works show a highly turbulent region above the entrance of firebrands to the wind tunnel which is formed because of the velocity difference and penetration of firebrand entrance hose into the wind tunnel. The penetration is required to provide a uniform firebrand distribution along the height of the test section. In this computational work, the influence of the height of the entrance hose, its orientation respect to the tunnel and the distance between the coupling port and the test section are analyzed. The optimized results are presented and discussed for a variety of wind speeds within the wind tunnel and the firebrand generator.

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Frick, Konor, Shannon Bragg-Sitton, and Cristian Rabiti. "Modeling the Idaho National Laboratory Thermal-Energy Distribution System (TEDS) in the Modelica Ecosystem." Energies 13, no. 23 (December 1, 2020): 6353. http://dx.doi.org/10.3390/en13236353.

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Integrated energy systems (IES)—including the intimate coupling between thermal generators, the grid, ancillary processes, and energy storage—are becoming increasingly pertinent to the energy grid. To facilitate a better understanding of IES, Idaho National Laboratory (INL) has developed the experimental Thermal Energy Distribution System (TEDS) to test the interoperability of nuclear reactors, energy storage, and ancillary processes in a real-world setting. This paper provides an overview of the development of TEDS within INL’s Modelica dynamic process modeling ecosystem as part of the IES initiative. The model will bridge the gap between lab-scale experimental results and desired grid-scale energy solutions. Two simulation sets were run. The first was a 5-h test simulating a facility shakedown test, putting the facility through five potential operating modes and showcasing the ability of the valving, control sensors, and component controllers to meet system demands. The second case imposed a typical summer day demand on the system from a region with mixed commercial and residential electrical needs. In this case, the generator alone could not meet peak demand but instead required the thermal-storage unit to act as a peaking unit.

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Journal articles on the topic 'Coupling Facility'

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