Relevant bibliographies by topics / Projectiles Detectors

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Projectiles Detectors'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Projectiles Detectors"

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SHER, G., and M. A. RANA. "A STUDY OF CHARGE-PICKUP INTERACTIONS BY (158A GeV) Pb NUCLEI." International Journal of Modern Physics E 20, no. 06 (June 2011): 1519–26. http://dx.doi.org/10.1142/s0218301311018459.

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We investigate the charge-pickup cross section of 158A GeV 207 Pb projectiles on Bi , Pb , Cu and Al targets using CR39 nuclear track detectors. The target-detector stacks were exposed at CERN SPS beam facility. Chemical etched detectors are scanned using optical microscope, and the data in the form of etched cone heights have been collected. We have identified the beam and fragment charge states in particular charge-pickup (Z = 83) by the Pb ions using the etched cone heights. Dependence of charge-pickup cross section of 158A GeV 207 Pb projectiles on the target mass number is described and results are compared to similar measurements found in the literature.
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Kuczera, H., H. Iglseder, U. Weishaupt, and E. Igenbergs. "Acoustic Penetration and Impact Detector for Micrometeoroid and Space Debris Application." International Astronomical Union Colloquium 85 (1985): 129. http://dx.doi.org/10.1017/s0252921100084487.

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AbstractAn active detector is described which recently has been developed for laboratory impact measurements and which already has been proposed for cosmic dust flight experiments. The detector consists of a very thin penetration foil and an impact plate. By means of piezo detectors the elastic-wave propagation times between the impact location and the piezo detectors can be measured in the foil and in the target. The evaluation of these signals gives the time of the event, the impact location, the projectile velocity, the flight path direction and at least the order of magnitude of mass of the impacting particle. This type of sensor will meet all requirements for particle detection in the diameter range from a few microns (dust particles) up to approx. a few millimeters (space debris) at all velocities. Small-sized projectiles can be detected by sensitive amplifiers. Low-energy electronics including data storage can be used for triangulation and impact time calculation. First experimental results which have been achieved in the Munich Accelerator Facilities will be presented.
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RANA, MUKHTAR AHMED, SHAHID MANZOOR, and GUL SHER. "CHARGE AND MASS CHANGING CROSS-SECTIONS OF 158A GeV Pb PROJECTILES ON Al, Cu, Bi, AND Pb TARGETS: FRAGMENTATION PROCESSES." International Journal of Modern Physics E 19, no. 10 (October 2010): 1993–2007. http://dx.doi.org/10.1142/s0218301310016466.

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We report here on total and partial charge changing cross-sections of 158A GeV lead projectiles on Al , Cu , Pb and Bi stationary targets using CR-39 detectors. Present results are compared with relevant published results. Deep discussion of nuclear fragmentation processes is provided. Stacks of CR-39 Track Detectors with above-mentioned targets were exposed to 158 A GeV 207 Pb projectiles at the CERN-SPS beam facility at normal incidence with a fluence of about 1500 ions/cm 2. Lengths of etched cones on one face of the CR-39 detectors before and after the target were measured for each stack. These measurements were used for determination of total and partial charge changing cross-sections of 158 A GeV Pb 82+ projectiles on these targets in the charge region 63 < Z < 82. The charge resolution (σZ) achieved in the present experiment is ~0.18e. Mass changing cross-sections are derived from the measured charge changing cross-sections using hyper-geometric relationship. A new method is proposed for separate measurements of electromagnetic and nuclear parts of fragmentation cross-sections using ion channeling and blocking conditions of projectiles in crystalline targets.
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Weiss, Janusz, and Józef Grzybowski. "INTEGRATED SYSTEM FOR SPOTTING THE FALLS OF BALLISTIC ARTILLERY SHELLS AND MISSILES." PROBLEMY TECHNIKI UZBROJENIA 146, no. 2 (October 15, 2018): 39–50. http://dx.doi.org/10.5604/01.3001.0012.6807.

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A system monitoring the falls of artillery projectiles within the area of live firings consists of detectors, separated by distances no larger than 50 m in the ground and 100 m in water, having a single core microcomputer with GPS localiser, radio link interface and a powering battery. For this reason a data transmitter is placed near the area and a receiver of transferred data and a computer with the software for visualisation of projectile impact sites is placed on a centre for controlling (commanding) and evaluating the results of firing. The managing software reconstructs an event and its position and displays it in the real time into the picture of the area shown on the monitor by analysing the data received from detectors in the form of compressed records of digital data. The received data can be used for verification and evaluation of performed firing assignments.
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DE BOER, F. W. N., and C. A. FIELDS. "A REEVALUATION OF EVIDENCE FOR LIGHT NEUTRAL BOSONS IN NUCLEAR EMULSIONS." International Journal of Modern Physics E 20, no. 08 (August 2011): 1787–803. http://dx.doi.org/10.1142/s021830131101960x.

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Electron–positron pair production data obtained by bombardment of emulsion detectors with either cosmic rays or projectiles with masses between 1 and 207 amu and kinetic energies between 18 GeV and 32 TeV have been reanalyzed using a consistent and conservative model of the background from electromagnetic pair conversion. The combined data yield a spectrum of putative neutral bosons decaying to e+e- pairs, with masses between 3 and 20 MeV /c2 and femtosecond lifetimes. The statistical significance against background for these "X-bosons" varies between 2σ and 8σ. The cross-section for direct production of X-bosons increases slowly with projectile energy, remaining over 1,000 times smaller than the pion production cross-section.
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Flesch, F., S. E. Hirzebruch, G. Hüntrup, H. Röcher, T. Streibel, E. Winkel, and W. Heinrich. "Fragmentation cross section measurements of iron projectiles using CR-39 plastic nuclear track detectors." Radiation Measurements 31, no. 1-6 (June 1999): 533–36. http://dx.doi.org/10.1016/s1350-4487(99)00140-7.

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Khan, E. U., J. J. Baluch, R. Tahseen, F. N. Khattak, F. U. Khan, S. H. Qureshi, A. Waheed, et al. "Heavy ion interaction of 14 MeV/N Pb projectiles with heavy targets using different track detectors." International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements 19, no. 1-4 (January 1991): 631–36. http://dx.doi.org/10.1016/1359-0189(91)90281-l.

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Rosner, B., D. P. Almeida, L. F. S. Coelho, E. C. Montenegro, and A. G. De Pinho. "Dependence of the energy signal of surface barrier detectors on the incident charge state of nitrogen projectiles." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 42, no. 3 (July 1989): 325–27. http://dx.doi.org/10.1016/0168-583x(89)90442-4.

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Meyer, J. D., S. Biri, F. Ditrói, O. Hohn, S. Runkel, and K. Stiebing. "Assessment of pulse height defect in passivated implanted planar Si detectors used for channeling measurements with slow, highly charged heavy projectiles." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 190, no. 1-4 (May 2002): 379–82. http://dx.doi.org/10.1016/s0168-583x(01)01262-9.

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Baum, Sebastian, Thomas D. P.  Edwards, Katherine Freese, and Patrick Stengel. "New Projections for Dark Matter Searches with Paleo-Detectors." Instruments 5, no. 2 (June 11, 2021): 21. http://dx.doi.org/10.3390/instruments5020021.

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Paleo-detectors are a proposed experimental technique to search for dark matter (DM). In lieu of the conventional approach of operating a tonne-scale real-time detector to search for DM-induced nuclear recoils, paleo-detectors take advantage of small samples of naturally occurring rocks on Earth that have been deep underground (≳5 km), accumulating nuclear damage tracks from recoiling nuclei for O(1)Gyr. Modern microscopy techniques promise the capability to read out nuclear damage tracks with nanometer resolution in macroscopic samples. Thanks to their O(1)Gyr integration times, paleo-detectors could constitute nuclear recoil detectors with keV recoil energy thresholds and 100 kilotonne-yr exposures. This combination would allow paleo-detectors to probe DM-nucleon cross sections orders of magnitude below existing upper limits from conventional direct detection experiments. In this article, we use improved background modeling and a new spectral analysis technique to update the sensitivity forecast for paleo-detectors. We demonstrate the robustness of the sensitivity forecast to the (lack of) ancillary measurements of the age of the samples and the parameters controlling the backgrounds, systematic mismodeling of the spectral shape of the backgrounds, and the radiopurity of the mineral samples. Specifically, we demonstrate that even if the uranium concentration in paleo-detector samples is 10−8 (per weight), many orders of magnitude larger than what we expect in the most radiopure samples obtained from ultra basic rock or marine evaporite deposits, paleo-detectors could still probe DM-nucleon cross sections below current limits. For DM masses ≲ 10 GeV/c2, the sensitivity of paleo-detectors could still reach down all the way to the conventional neutrino floor in a Xe-based direct detection experiment.
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Dissertations / Theses on the topic "Projectiles Detectors"

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Wilson, Michael J. "Nonlinear projectile attitude estimation with magnetometers and angular rate sensors." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 37 p, 2006. http://proquest.umi.com/pqdweb?did=1163250861&sid=2&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Turchetta, Renato. "Developpement de detecteurs silicium dobule face a resolution spatiale elevee et lecture projective." Université Louis Pasteur (Strasbourg) (1971-2008), 1991. http://www.theses.fr/1991STR13236.

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Un nouveau type de detecteurs silicium micropistes double face a couplage capacitif a ete developpe. La separation ohmique entre pistes est obtenue par effet de champ, etudie experimentalement et par simulation. Un prototype avec un pas de 50 microns a ete teste dans un faisceau de particules energetiques, avec un telescope de detecteurs silicium micropistes simple face a couplage capacitif, utilise pour la reconstruction spatiale precise des traces. La resolution spatiale du detecteur double face est d'environ 10 microns sur les deux faces. Une simulation monte carlo basee sur un modele de division de charge dans les detecteurs micropistes a ete developpee. Elle reproduit bien les resultats des tests en faisceau et permet de predire les performances des detecteurs micropistes, simple et double face. Sur la base de ces resultats, la collaboration delphi (lep) se prepare a installer deux couches de ces nouveaux detecteurs double face, afin d'obtenir une reconstruction tridimensionnelle precise des trajectoires des particules chargees issues des collisions electron-positron a haute energie
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Mukkananchery, Abey. "Iterative Methods for the Reconstruction of Tomographic Images with Unconventional Source-detector Configurations." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1244.

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X-ray computed tomography (CT) holds a critical role in current medical practice for the evaluation of patients, particularly in the emergency department and intensive care units. Expensive high resolution stationary scanners are available in radiology departments of most hospitals. In many situations however, a small, inexpensive, portable CT unit would be of significant value. Several mobile or miniature CT scanners are available, but none of these systems have the range, flexibility or overall physical characteristics of a truly portable device. The main challenge is the design of a geometry that optimally trades image quality for system size. The goal of this work has been to develop analysis tools to help simulate and evaluate novel system geometries. To test the tools we have developed, three geometries have been considered in the thesis, namely, parallel projections, clam-shell and parallel plate geometries. The parallel projections geometry is commonly used in reconstruction of images by filtered back projection technique. A clam-shell structure consists of two semi-cylindrical braces that fold together over the patient's body and connect at the top. A parallel plate structure uses two fixed flat or curved plates on either side of the patient's body and image from fixed sources/detectors that are gated on and off so as to step the X-ray field through the body. The parallel plate geometry has been found to be the least reliable of the three geometries investigated, with the parallel projections geometry being the most reliable. For the targeted application, the clam-shell geometry seems to be the solution with more chances to succeed in the short term. We implemented the Van Cittert iterative technique for the reconstruction of images from projections. The thesis discusses a number of variations on the algorithm, such as the use of the Conjugate Gradient Method, several choices for the initial guess, and the incorporation of a priori information to handle the reconstruction of images with metal inserts.
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Forest, Collado Josep. "New Methods for Triangulation-based Shape Acquisition using Laser Scanners." Doctoral thesis, Universitat de Girona, 2004. http://hdl.handle.net/10803/7730.

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Tradicionalment, la reproducció del mon real se'ns ha mostrat a traves d'imatges planes. Aquestes imatges se solien materialitzar mitjançant pintures sobre tela o be amb dibuixos. Avui, per sort, encara podem veure pintures fetes a ma, tot i que la majoria d'imatges s'adquireixen mitjançant càmeres, i es mostren directament a una audiència, com en el cinema, la televisió o exposicions de fotografies, o be son processades per un sistema computeritzat per tal d'obtenir un resultat en particular. Aquests processaments s'apliquen en camps com en el control de qualitat industrial o be en la recerca mes puntera en intel·ligència artificial. Aplicant algorismes de processament de nivell mitja es poden obtenir imatges 3D a partir d'imatges 2D, utilitzant tècniques ben conegudes anomenades Shape From X, on X es el mètode per obtenir la tercera dimensió, i varia en funció de la tècnica que s'utilitza a tal nalitat. Tot i que l'evolució cap a la càmera 3D va començar en els 90, cal que les tècniques per obtenir les formes tridimensionals siguin mes i mes acurades. Les aplicacions dels escàners 3D han augmentat considerablement en els darrers anys, especialment en camps com el lleure, diagnosi/cirurgia assistida, robòtica, etc. Una de les tècniques mes utilitzades per obtenir informació 3D d'una escena, es la triangulació, i mes concretament, la utilització d'escàners laser tridimensionals. Des de la seva aparició formal en publicacions científiques al 1971 [SS71], hi ha hagut contribucions per solucionar problemes inherents com ara la disminució d'oclusions, millora de la precisió, velocitat d'adquisició, descripció de la forma, etc. Tots i cadascun dels mètodes per obtenir punts 3D d'una escena te associat un procés de calibració, i aquest procés juga un paper decisiu en el rendiment d'un dispositiu d'adquisició tridimensional. La nalitat d'aquesta tesi es la d'abordar el problema de l'adquisició de forma 3D, des d'un punt de vista total, reportant un estat de l'art sobre escàners laser basats en triangulació, provant el funcionament i rendiment de diferents sistemes, i fent aportacions per millorar la precisió en la detecció del feix laser, especialment en condicions adverses, i solucionant el problema de la calibració a partir de mètodes geomètrics projectius.
Traditionally, the reproduction of the real world has been shown to us by means of at images. These images used to be materialised by means of paint on canvas, drawings or the like. Today, we still see hand made pictures, by fortune, although most of the images are acquired by cameras and they are either directly shown to an audience, like in the cinema, television or photographs, or they are processed by a computer system in order to obtain a particular result, like in industrial quality assurance or bleeding edge artificial intelligence research. Applying mid-level processing algorithms, 3D images can be obtained from 2D ones, using well known techniques called Shape From X, where X is the method for obtaining the 3rd dimension. While the evolution to the 3D camera begun in the 90s, the techniques for obtaining the most accurate 3D shape need to be continuously improving. The application of 3D scanners has spread signi cantly in the recent years, specially in elds like entertainment, assisted diagnosis/ surgery, robotics, etc. One of the most used techniques to obtain 3D information from a scene is triangulation, and more concretely, triangulationbased laser scanners. Since their formal appearance in scienti c publications, in 1971 [SS71], there have been contributions for solving inherent problems like occlusion avoidance, accuracy improvement, acquisition speed, shape description, etc. All of the methods for obtaining 3D points of a scene is accompained with a calibration procedure, and this procedure plays a decisive role in the performance of the acquisition device. The goal of this thesis is to provide a holistic approach to the problem of shape acquisition, giving a wide survey of triangulation laser scanners, testing the performance of di erent systems, and to give contributions for both improving acquisition accuracy under adverse conditions and solving the calibration problem. In addition, the calibration approach is based on previous works that used projective geometry to this end.
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Cacek, Pavel. "Tvorba panoramatických fotografií." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234953.

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This thesis deals with issues automatic composing panoramic photos from individual photos. Gradually examines the various steps of algorithms and methods used in them, which are used in creating panoramas. It also focuses on the design of the own system based on methods discussed to construct panoramas. This system is implemented using OpenCV library and it is created also a graphical interface using a Qt library. Finally, are in this thesis evaluated outcomes of this designed and implemented system on available datasets.
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Korir, Kipkirui Arap. "Mechanisms of Heavy Ion Reactions and De-excitation in Processes Initiated by Projectiles at Intermediate Energies, Using a Gamma Detector Array." Thesis, 2007. http://hdl.handle.net/10539/2156.

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Student Number : 0000713F - PhD thesis - School of Physics - Faculty of Science
The Doppler shift and the Doppler broadening of prompt gamma emissions were measured for some residues formed in the interaction of 33 A MeV 12C ions with a 63Cu target using the AFRODITE detector array at Faure, Cape Town. This is a potentially new technique to carry out nuclear interaction studies. Coincident gamma rays emitted by the residues are used in their identification. Detection at angles other than 90◦ with respect to the beam axis gives the magnitude of the mean Doppler shifts and the average linear momentum transfer. The Doppler broadening of the detected gamma lines at 90 ◦ with respect to the beam axis could give the residue recoil angular distribution. The precise shapes of the Doppler shifted and broadened gamma lines for each of the residues extracted, reveals the distribution, in magnitude and angle, of the momentum transferred in the interaction process. In addition, characteristic gamma energy transitions of each residue populated carry additional information on angular momentum (spin) transfer, production cross-section and nuclear excitation states. The measured residues show a unique distribution of momentum ranging from single nucleon transfer to complete damping of the projectile momentum. The measured observables are consistent with the existing data from other techniques, making the new technique viable option for studying nuclear interaction kinematics. A comparison of the experimental measurements with the predictions of the model developed in Milano 1 and GEANT4 calculations shows that the model developed in Milano model give a much better agreement compared to the GEANT4 calculations, attributed to the assumption of projectile break-up and re-emission process of some of the fragments during the first step of the nuclear interaction process.
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Books on the topic "Projectiles Detectors"

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Wigmans, Richard. Instrumental Aspects. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786351.003.0005.

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This chapter deals with the practical aspects of designing, building and operating calorimeters. These aspects concern the structure of the detector (longitudinal and lateral segmentation, projective towers, hermeticity of 4π‎ devices), the readout of calorimeters based on detection of either light or charge signals, the operation in a magnetic field or at high luminosity, and the effects of radiation damage and how to deal with these. Also discussed are procedures for handling the signals, and using these to create triggers that may be used to select events of interest. Auxiliary equipment that may make such triggers more selective (preshower detectors, shower max detectors, etc.) is described as well.
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Book chapters on the topic "Projectiles Detectors"

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Paar, H., D. Thomas, M. Sivertz, B. Ong, D. Acosta, T. Taylor, and B. Shreiner. "A Projective Geometry Lead Fiber Scintillator Detector." In Supercollider 2, 267–68. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-3728-1_23.

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Sabharwal, Chaman L., and Jennifer L. Leopold. "A Generic Design for Implementing Intersection between Triangles in Computer Vision and Spatial Reasoning." In Innovative Research in Attention Modeling and Computer Vision Applications, 195–235. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8723-3.ch008.

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The intersection between 3D objects plays a prominent role in spatial reasoning, and computer vision. Detection of intersection between objects can be based on the triangulated boundaries of the objects, leading to computing triangle-triangle intersection. Traditionally there are separate algorithms for cross and coplanar intersection. For qualitative reasoning, intersection detection is sufficient, actual intersection is not necessary; in contrast, the precise intersection is required for geometric modeling. Herein we present a complete design and implementation of a single integrated algorithm independent of the type of intersection. Additionally, this algorithm first detects, then intersects and classifies the intersections using barycentric coordinates. This work is directly applicable to: (1) VRCC-3D+, which uses intersection detection between 3D objects as well as their 2D projections essential for occlusion detection; and (2) CAD/CAM geometric modeling where curves of intersection between a pair of surfaces are required for numerical control machines. Experimental results are provided.
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Conference papers on the topic "Projectiles Detectors"

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Li, Jiaxing, Denggao Zhang, and Pingping Liu. "Study the TOF Detector in RIBLL With GEANT4." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-30138.

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We present here an ellipsoidal timing detector in Radioactive Ion Beam Line in Lanzhou (RIBLL). The photons induced by radioactive beam ions passing through a thin plastic-scintillator foil BC422, emit from the foil center corresponding to one focal point of an aluminum ellipsoidal mirror and are reflected to another focus point at which the cathode of a photomultiplier tube locates. A time resolution of about 115ps is achieved for 12N and the counting rate up to 108 pps is allowed. The simulation was carried out using GEANT4 Monte Carlo toolkit. The photons total collection efficiency following projectile from different position, photon collection efficiency and time resolution of photon to photocathode of 3 different cases were calculated. Also the main factors influencing the detector’s time resolution and some proposals are given.
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Aminmansour, Sina, Frederic Maire, and Christian Wullems. "Video Analytics for the Detection of Near-Miss Incidents on Approach to Railway Level Crossings." In 2014 Joint Rail Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/jrc2014-3811.

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Recent modelling of socio-economic costs by the Australian railway industry in 2010 has estimated the cost of level crossing accidents to exceed AU$116 million annually. To better understand causal factors that contribute to these accidents, the Cooperative Research Centre for Rail Innovation is running a project entitled Baseline Level Crossing Video. The project aims to improve the recording of level crossing safety data by developing an intelligent system capable of detecting near-miss incidents and capturing quantitative data around these incidents. To detect near-miss events at railway level crossings a video analytics module is being developed to analyse video footage obtained from forward-facing cameras installed on trains. This paper presents a vision base approach for the detection of these near-miss events. The video analytics module is comprised of object detectors and a rail detection algorithm, allowing the distance between a detected object and the rail to be determined. An existing publicly available Histograms of Oriented Gradients (HOG) based object detector algorithm is used to detect various types of vehicles in each video frame. As vehicles are usually seen from a sideway view from the cabin’s perspective, the results of the vehicle detector are verified using an algorithm that can detect the wheels of each detected vehicle. Rail detection is facilitated using a projective transformation of the video, such that the forward-facing view becomes a bird’s eye view. Line Segment Detector is employed as the feature extractor and a sliding window approach is developed to track a pair of rails. Localisation of the vehicles is done by projecting the results of the vehicle and rail detectors on the ground plane allowing the distance between the vehicle and rail to be calculated. The resultant vehicle positions and distance are logged to a database for further analysis. We present preliminary results regarding the performance of a prototype video analytics module on a data set of videos containing more than 30 different railway level crossings. The video data is captured from a journey of a train that has passed through these level crossings.
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Guangchao, Li, Cong Peng, Guo Xiaojing, Chen Liu, Ni Minzi, Sun Yuewen, and Zhao Zhongwei. "Image Calibration Based on Dynamic No-Load Data for the 60Co Gantry-Movable Dual-Projection Radiography Inspection System." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16511.

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Abstract The 60Co gantry-movable dual-projection radiography inspection system is newly developed, aiming to the inspection of vehicles entering and exiting the nuclear facilities. It adopts two Co-60 radioactive sources and two arrays of gas ionization chambers corresponding to the two sources, respectively. They can move synchronously with the gantry driven by the mechanical and control subsystem. So, dual projections could be obtained through one scan from two different directions. Compared to a single projection, the dual projections make it easier to found hidden objects and distinguish whether a dark area is due to overlapping objects or because there are well-shielded prohibited items such as nuclear materials. Therefore, it is helpful to found well-shielded nuclear materials and prevent them from being stolen. However, problems also come due to the using of two radioactive sources and the moving gantry. For the former one, it will bring about scattering effect between two sources, while for the latter one, the signals of the detectors would fluctuate as the gantry moves, owing to the vibration of collimator and gantry as well as the non-synchronous movement of sources and detectors. So, the radiography projections are needed to be corrected. In response to the second question, the no-load data is repeatedly measured when the gantry is in different positions, then a method of image calibration based on the dynamic no-load data is proposed for this inspection system to replace the correction with average no-load data. Result shows that the corrected no-load image turns smoother, meaning that the method of dynamic correction could effectively improve the radiation image.
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Yu, Jiyan, Xiaoming Wang, and Yongxin Li. "Velocity and Position Measurement for Projectile Using Double Optical Detectors and Reflectors." In 2009 Symposium on Photonics and Optoelectronics. IEEE eXpress Conference Publishing, 2009. http://dx.doi.org/10.1109/sopo.2009.5230204.

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Jin, Kyung-Chan, Sung-Ho Lee, and Geon-Hee Kim. "Three-Dimensional Tomographic Reconstruction for Microscale Object Modeling." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51106.

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When scanning a relatively high resolution, thick object using conventional computed tomography (CT), the scanning axis of the X-ray gantry and detector is approximately perpendicular to the rotation axis of the sample. However, the inner interconnections in flat 3D devices are not reconstructed correctly in regular circular CT. In this paper, we focus on 3D tomographic reconstruction of inner interconnections by CT with particular attention to off-centered circular trajectory CT. However, in off-centered circular trajectory CT, the limited tilting angles of projections result in a missing wedge artifact because the object cannot usually be tilted beyond the limit and the data in the remaining projections are not obtained. Therefore, to alleviate missing wedge artifacts, we propose a reconstruction scheme of combining by filtered back projection (FBP) and constraint-based total variation minimization (c-TVM). In the c-TVM method, the artifact of missing wedge is minimized and the reconstructed region is suppressed with high frequency details while leaving the boundaries between homogeneous regions. In our experiments, the CT system obtained the projected images from a rotating sample using a fixed-mounted X-ray source and detector. We acquired 400 rotational projection images of a vertical connection in an off-centered circular trajectory with 30° tilting angles. We then reconstructed the aligned 3D views of the sample. Finally, we demonstrated that the proposed FBP and c-TVM combination with iterative processing yields a superior 3D reconstruction model to conventional tomography.
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Bier, Bastian, Martin Berger, Jennifer Maier, Mathias Unberath, Scott Hsieh, Serena Bonaretti, Rebecca Fahrig, Marc E. Levenston, Garry E. Gold, and Andreas Maier. "Object removal in gradient domain of cone-beam CT projections." In 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD). IEEE, 2016. http://dx.doi.org/10.1109/nssmic.2016.8069480.

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Zhang, Hua, Yang Liu, Xi Tao, Zhaoying Bian, Jianhua Ma, and Wufan Chen. "Four dimensional cone-beam computed tomography reconstruction using multi-phase projections." In 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD). IEEE, 2016. http://dx.doi.org/10.1109/nssmic.2016.8069595.

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Huber, Rachel C., Erik B. Watkins, Dana M. Dattelbaum, and Richard L. Gustavsen. "X-ray diffraction diagnostic paired with gas gun driven compression of polyethylene." In 2019 15th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/hvis2019-112.

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Abstract:
Abstract Understanding the kinetics of phase transitions, including decomposition from reactants to products under extreme condition events is challenging. Capturing these processes require: 1) diagnostics that probe on the timescales and at energies capable of interacting with the dynamically evolving products, penetrating the opaqueness of the changing system; and 2) detectors sensitive enough to observe these events. Synchrotrons and free electron lasers provide ke-V-energy x-ray beams capable of penetrating the optical-opaqueness of the temporally evolving products. At the Dynamic Compression Sector at the Advanced Photon Source, the x-ray beam is coupled to single and two-stage gas guns capable of producing planar shocks at a range of projectile velocities while capturing in situ x-ray diffraction/scattering of the evolving material under dynamic compression. In this work, we demonstrate the utility of this approach in measuring the evolution of crystalline domains in shocked high-density polyethylene to P = 7.45 GPa, and have observed the compression and orientation of the polymer chains in real time.
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Schlup, Philip, Greg Futia, and Randy A. Bartels. "Tomographic Imaging with Lateral Frequency Modulation Projections Using a Single-Element Detector." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/cleo_si.2011.cwb7.

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Qi, Keyu, Zheng Huang, Jiawei Wang, and Ke Liang. "Design of a four-quadrant detector for the laser seeker of guided gun-launched projectile." In Optical Sensing and Imaging Technology and Applications, edited by Yadong Jiang, Haimei Gong, Weibiao Chen, and Jin Li. SPIE, 2017. http://dx.doi.org/10.1117/12.2283259.

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