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Relevant bibliographies by topics / Radius of electron

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Academic literature on the topic 'Radius of electron'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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Journal articles on the topic "Radius of electron"

1

Bezginov, N., T. Valdez, M. Horbatsch, A. Marsman, A. C. Vutha, and E. A. Hessels. "A measurement of the atomic hydrogen Lamb shift and the proton charge radius." Science 365, no. 6457 (2019): 1007–12. http://dx.doi.org/10.1126/science.aau7807.

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The surprising discrepancy between results from different methods for measuring the proton charge radius is referred to as the proton radius puzzle. In particular, measurements using electrons seem to lead to a different radius compared with those using muons. Here, a direct measurement of the n = 2 Lamb shift of atomic hydrogen is presented. Our measurement determines the proton radius to be rp = 0.833 femtometers, with an uncertainty of ±0.010 femtometers. This electron-based measurement of rp agrees with that obtained from the analogous muon-based Lamb shift measurement but is not consistent with the larger radius that was obtained from the averaging of previous electron-based measurements.

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Irani, Ardeshir. "Calculatons of the Electron Radius." Journal of High Energy Physics, Gravitation and Cosmology 10, no. 02 (2024): 724–25. http://dx.doi.org/10.4236/jhepgc.2024.102044.

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Gulyamov, G., A. G. Gulyamov, A. B. Davlatov, and Kh N. Juraev. "Energy Levels in Nanowires and Nanorods with a Finite Potential Well." Advances in Condensed Matter Physics 2020 (November 7, 2020): 1–12. http://dx.doi.org/10.1155/2020/4945080.

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The energy of electrons and holes in cylindrical quantum wires with a finite potential well was calculated by two methods. An analytical expression is approximately determined that allows one to calculate the energy of electrons and holes at the first discrete level in a cylindrical quantum wire. The electron energy was calculated by two methods for cylindrical layers of different radius. In the calculations, the nonparabolicity of the electron energy spectrum is taken into account. The dependence of the effective masses of electrons and holes on the radius of a quantum wires is determined. An analysis is made of the dependence of the energy of electrons and holes on the internal and external radii, and it is determined that the energy of electrons and holes in cylindrical layers with a constant thickness weakly depends on the internal radius. The results were obtained for the InP/InAs heterostructures.

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Sick, Ingo. "Proton Charge Radius from Electron Scattering." Atoms 6, no. 1 (2017): 2. http://dx.doi.org/10.3390/atoms6010002.

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Arzhannikov, Andrey, Maxim Makarov, Stanislav Sinitsky, Denis Samtsov, and Vasily Stepanov. "The Method To Find The Angular Distribution Of Relativistic Magnetized Electron Beam From Measurements Of Their Absorption In A Sequence Of Cylindrical Collimators." Siberian Journal of Physics 12, no. 1 (2017): 26–42. http://dx.doi.org/10.54362/1818-7919-2017-12-1-26-42.

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In the problem on motion of magnetized relativistic electrons in a cylindrical channel with the radius comparable with characteristic Larmor radius of the electrons, a distribution of electrons with arbitrary initial angular spread absorbed in the channel wall along its axis is found. The solution is obtained by 3D modelling taking into account the reflection of electrons from the cylindrical surface of the channel. Basing on the received solution the multichannel detector of the electron angular spread in the form of sequential absorbing collimators with gradually decreasing diameter is constructed and tested in a real experiment. Mathematical procedure to find the angular distribution function of the electron velocities from the measurements of the collimator currents is described.

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Li, Yongtao, Hanyan Li, and Jinjun Feng. "Investigation of Spindt Cold Cathode Electron Guns for Terahertz Traveling Wave Tubes." Electronics 12, no. 20 (2023): 4197. http://dx.doi.org/10.3390/electronics12204197.

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In this work, a Spindt cold cathode electron gun with a PPM (periodic permanent magnet) focusing system for a terahertz TWT (traveling wave tube) was designed and simulated based on the Pierce electron gun structure. More specifically, a new 3D (three dimensional) emission model was used, where the cathode radius of the electron gun was 1 mm and the cathode current was 30 mA, with an emitting half angle of about 28°. It was demonstrated that the electron beam was well focused with an electron beam radius of 0.3 mm and a filling ratio of 0.5 when the maximum value of the PPM field along with the axis was 0.122T. According to the simulation results, a planar cold cathode electron gun was developed. Measurements demonstrated that the I/V characteristics of the cold cathode gun were consistent with that of a cold cathode, revealing that the electrons emitted from the cathode are not intercepted when passing through the electron gun.

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Malykhina, Tetiana, Stepan Karpus, Oleg Shopen, and Valerii Prystupa. "Simulation of a High-Energy Electron Beam Transmission Through Titanium and Kapton® Thin Films." 4, no. 4 (December 10, 2021): 124–29. http://dx.doi.org/10.26565/2312-4334-2021-4-15.

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The results of computer simulation of the high-energy electrons passage through thin layers of titanium (Ti) and polyimide Kaptonâ (C22H10N2O5) in the energy range from 3 MeV to 20 MeV are presented. Simulation is carried out using the Geant4 toolkit. The number of primary electrons is 6.24×107 for each series of calculations. The thickness of the titanium foil in the model experiment is 50 µm, the thickness of the Kaptonâ film is 110 µm. The energies of primary electrons are chosen as following: 3 MeV, 5 MeV, 10 MeV, 15 MeV, and 20 MeV. The purpose of the calculations is to reveal the possibility of using the Kaptonâ film in the output devices of linear electron accelerators. It was necessary to calculate the probable values of the energy absorbed in a Kaptonâ film and in a titanium foil for each value of primary electrons energy. Another important characteristic is the divergence radius of the electron beam at a predetermined distance from the film, or the electron scattering angle. As a result of calculations, the energy spectra of bremsstrahlung gamma-quanta, formed during the passage of electrons through the materials of the films, are obtained. The most probable values of the energy absorbed in the titanium foil and in the Kaptonâ film are calculated. The scattering radii of an electron beam for the Kaptonâ film and also for the titanium foil at a distance of 20 centimeters are estimated. These calculations are performed for electron energies of 3 MeV, 5 MeV, 10 MeV, 15 MeV, and 20 MeV. A comparative analysis of the obtained results of computational experiments is carried out. It is shown that the ratio of the total amount of bremsstrahlung gamma quanta in the case of use the Kaptonâ film is approximately 0.56 of the total amount of bremsstrahlung gamma quanta when using the titanium foil. The coefficients of the ratio of the electrons scattering radius most probable value after passing through Kaptonâ to the most probable value of the scattering radius after passing through titanium are from 0.62 at electrons energy of 3 MeV to 0.57 at electrons energy of 20 MeV. The analysis of the calculated data showed that the use of Kaptonâ (C22H10N2O5) as a material for the manufacture of output devices for high-energy electron beams is more preferable in comparison to titanium films, since the use of Kaptonâ instead of titanium makes it possible to significantly reduce the background of the generated bremsstrahlung gamma quanta and reduce the scattering radius of the electron beam.

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Yang, Wei, Fei Gao, and You-Nian Wang. "Effects of chamber size on electron bounce-resonance heating and power deposition profile in a finite inductive discharge." Physics of Plasmas 29, no. 6 (2022): 063503. http://dx.doi.org/10.1063/5.0090806.

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Effects of chamber size on electron bounce-resonance heating (BRH) and power deposition profile are numerically studied in a finite inductive Ar discharge under a low-pressure range of 0.3–3 Pa. The BRH characterized by a plateau formation in the electron energy probability function (EEPF) exists only at the small chamber radius and relatively low pressure and is enhanced at a larger chamber height. It is attributed to a remarkable increase in the energy diffusion coefficient caused by electron heating at the first bounce resonance condition. As increasing chamber radius and pressure, the enhancement in the energy diffusion coefficient caused by electron–electron collisions tends to Maxwellianize the EEPF, thus resulting in weakness and even disappearance of the BRH. For relatively low pressure, the number of positive and negative power deposition regions increases with increasing chamber radius, and there is no region of negative power deposition at the small chamber radius where the skin depth becomes closer to the chamber radius.

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LOTOV, K. V. "Optimum angle for side injection of electrons into linear plasma wakefields." Journal of Plasma Physics 78, no. 4 (2012): 455–59. http://dx.doi.org/10.1017/s0022377812000335.

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AbstractA unified model of electron penetration into linear plasma wakefields is formulated and studied. The optimum angle for side injection of electrons is found. At smaller angles, all electrons are reflected radially. At larger angles, electrons enter the wakefield with superfluous transverse momentum that is unfavorable for trapping. Separation of incident electrons into penetrated and reflected fractions occurs in the outer region of the wakefield at some ‘reflection’ radius that depends on electron energy.

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Zubarev, Nikolay M., Olga V. Zubareva, and Michael I. Yalandin. "Features of Electron Runaway in a Gas Diode with a Blade Cathode." Electronics 11, no. 17 (2022): 2771. http://dx.doi.org/10.3390/electronics11172771.

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Conditions for electron runaway in a gas diode with a blade cathode providing a strongly inhomogeneous distribution of the electric field in the interelectrode gap have been studied theoretically. It has been demonstrated that the character of electron runaway differs qualitatively for cathodes with a different rounding radius of the edges. In the case of a relatively large edge radius (tens of microns or more), the conditions for the transition of electrons to the runaway mode are local in nature: they are determined by the field distribution in the immediate vicinity of the cathode where the electrons originate from. Here, the relative contribution of the braking force acting on electrons in a dense gas reaches a maximum. This behavior is generally similar to the behavior of electrons in a uniform field. For a cathode with a highly sharpened edge, the relative contribution of the braking force is maximum in the near-anode region. As a consequence, the runaway condition acquires a nonlocal character: it is determined by the electron dynamics in the entire interelectrode gap.

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Dissertations / Theses on the topic "Radius of electron"

1

Makino, Yukio. "Chemical Interpretation of Superconductivity by Valence Electron Parameters." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188509.

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Messén, Matilda, and Elvira Moser. "Simulation of Detector Response : How Does the Electron Multiplication Differ Within Ionization Chambers with Various Geometries?" Thesis, KTH, Medicinteknik och hälsosystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253793.

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This degree project was performed in collaboration with the division of nuclear physics at the department of physics, KTH Royal Institute of Technology. A partial goal of the project was to create a simulation model, where the relationship be- tween the multiplication of electrons that occurs in an ionization chamber and the different pressures of air in the detector could be visualized. The main goal was then to use this model in order to examine the behaviour of electron multiplication for different geometries of the simulated ionization chamber. The simulation was performed in Python 3.7 (Python Soft- ware Foundation, DE, United States), and geometry was modified by increasing and decreasing the simulated inner and anode wire radius of the chamber. Results showed that the peak of the multiplication curve occurred at different pressures for different geometries. When the anode wire radius was fixed, the peak occurred at a lower pressure for an increase of the inner radius, whereas, when the inner radius was fixed, the peak occurred at a higher pressure for an increase of the anode wire radius. The number of created electrons are dependent of Townsend’s coefficent, α, which in turn is dependent of the relationship between pressure and electric field strength. The electric field strength within an ionization chamber varies for different geometries, and therefore is the relationship between pressure and electric field that results in the max- imum value of α, and thus the maximum peak of the multiplication factor, consequently given by different pressures for different chamber geometries. If the results from the simulations in this project are to correspond with actual experimental data, the knowledge of this geometry-dependence may be used to include or exclude the multiplication peak in further measurements depending upon preference.

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Feth, Shari. "A study of the promolecule radius of nitrides, oxides and sulfides and of the bond critical point properties of the electron density distribution in nitrides." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-05042006-164544/.

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Kumar, Santhosh Tekke Athayil, and santhosh kumar@anu edu au. "Experimental Studies of Magnetic Islands, Configurations and Plasma Confinement in the H-1NF Heliac." The Australian National University. Research School of Physical Sciences and Engineering, 2008. http://thesis.anu.edu.au./public/adt-ANU20080611.171513.

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Rational magnetic flux surfaces in fusion (toroidal plasma confinement) devices can break the magnetic field lines and reconnect them in the form of magnetic islands. Formation of these magnetic islands can have a serious impact on the plasma confinement properties of the device. Islands can in general degrade the confinement by mixing up different regions of the plasma. However there has been experimental evidence of confinement improvement by island induced transport barriers, under certain conditions. Even though there are a large number of theoretical and experimental works on magnetic islands to date, there is clearly a paucity of convincing experimental understanding on the nature of behaviour of islands in plasma. This thesis reports detailed experimental studies conducted on the H-1NF heliac stellarator, to gain an in-depth understanding of magnetic islands and their influence in plasma confinement.¶ Work reported in this thesis can be mainly divided into three parts: (a) high resolution imaging of vacuum magnetic islands and flux surfaces of H-1NF, (b) accurate computer modeling of H-1NF magnetic geometry and (c) detailed experiments on magnetic islands in plasma configurations.¶ Electron-beam wire-tomography in the H-1NF has been used for the high resolution mapping of vacuum magnetic flux surfaces and islands. Point-to-point comparison of the mapping results with computer tracing, in conjunction with an image warping technique, has enabled systematic exploration of magnetic islands and surfaces of interest. A fast mapping technique has been developed, which significantly reduced the mapping time and made this technique suitable for mapping at higher magnetic fields.¶ Flux surface mapping has been carried out at various magnetic configurations and field strengths. The extreme accuracy of this technique has been exploited to understand the nature of error fields, by point-by-point matching with computer tracing results. This has helped in developing a best-fit computer model for H-1NF magnetic configurations, which can predict rotational transform correct to three decimal places. Results from plasma experiments on magnetic configuration studies are best explained by the new model.¶ Experiments with low order magnetic islands in plasma configurations yielded some new results. It has been observed that the low order magnetic islands (m = 2) near the core of the plasma serve as pockets of improved confinement region under favourable conditions. This results in significant profile modifications including enhancement of the radial electric field near the core to a large positive value. The characteristics of islands are found to be dependent on the plasma collisionality and the island width.¶ Experiments with a magnetic configuration which exhibits no vacuum islands, but the core rotational transform very close to low order rational value, show a spontaneous transition of the radial electric field near the core to a large positive value (nearly 5 kV/m), with a strong electric field shear (nearly 700 kV/m2) and localised improvement in confinement, during the discharge. Evidence indicates that the transition is driven by the excitation of low order magnetic islands near the axis during the plasma discharge, due to the modification of rotational transform profile by toroidal plasma currents. The situation is similar to the Core Electron-Root Confinement (CERC) observed during high temperature ECH plasma discharges on other helical devices. This result provides an experimental evidence for the hypothesis that the threshold conditions for observing CERC can be reduced by exciting magnetic islands near the core of the plasma.

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Cabrejos, David. "Implementation of a channel selection algorithm using cognitive radios." Thesis, Wichita State University, 2011. http://hdl.handle.net/10057/3945.

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With the increase of wireless devices, the wireless spectrum is becoming overloaded causing users to experience delays and performance degradation. Typically, a device will start transmitting data on a frequency and continue transmitting on that frequency regardless of the channel being overloaded or not. Some smarter devices such as routers are able to sense when their channel is becoming overloaded by observing delays and amount of devices transmitting on that frequency. Spectrum analyzers are usually very expensive and usually do not provide many functionalities other than analysis. Utilizing newer alternatives for sensing the spectrum such as Software Defined Radios (SDR) can address frequency allocation problems and allow users to decide the best frequency to use for communication. A promising SDR such as GNU Radio will be covered in this thesis, as well as the hardware components needed for its functionality. In this thesis, a cognitive radio approach is taken in designing a channel selection algorithm by scanning and monitoring the wireless spectrum on IEEE 802.11 b/g through the use of GNU Radio and USRP. Tests are performed as a proof of concept and to help future research with the use of cognitive radios.<br>Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Electrical Engineering.

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Keane, Aidan J. "Liouville's equation and radiative acceleration in general relativity." Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301358.

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Albrecht, Steffen. "Sigma-delta based techniques for future multi-standard wireless radios." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-459.

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Scharfe, Michelle Kristin. "Electron cross field transport modeling in radial-axial hybrid hall thruster simulations /." May be available electronically:, 2009. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Alanazi, Turki Mohammed J. "Electronic Protection Using Two Non-Coherent Marine Radars." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1533210598750943.

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Davuluri, Sruthi. "Decentralized economic dispatch for radial electric distribution systems." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122161.

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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 87-93).<br>Electricity power systems, typically a very slow-moving and traditional industry, is in a state of flux as technological innovations, such as rooftop solar, home energy management systems, and electric vehicles, are being rapidly integrated into electric distribution systems. As the need to decarbonize the electricity sector becomes increasingly important, a distribution system operator could serve a useful purpose by operating distribution systems and acting as the market operator at a sufficiently granular level to potentially improve resiliency, decrease delivery losses, and send appropriate price signals to its customers. Currently, this latter functionality is assumed to be done using centralized economic dispatch. Given a very large number of small customers and their diverse preferences, it would be computationally expensive to implement centralized economic dispatch at the distribution level with perfect information. In this thesis, an alternative algorithm, referred to as decentralized economic dispatch, is introduced which dispatches power for radial electric distribution systems while accounting for heterogeneous demand functions across customers, demonstrating computationally feasibility, and respecting the physical limits of the system. Unlike other approaches proposed in literature, which often take many iterations or do not converge, the algorithm introduced here converges to the same solution as a centralized operator with perfect information, and does so with only two sweeps across the system. A proof-of-concept example on a 46-bus system demonstrates the physical and economic benefits of the distributed algorithm with varying levels of distributed energy resources.<br>by Sruthi Davuluri.<br>S.M. in Technology and Policy<br>S.M.inTechnologyandPolicy Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society

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Books on the topic "Radius of electron"

1

Koga, J. Simulation of radial expansion of an electron beam injected into a background plasma. Dept. of Space Sciences, Southwest Research Institute, 1990.

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Center, Goddard Space Flight, ed. CRAF CREWE experiment: Coordinated radio electron wave experiment. NASA Goddard Space Flight Center, 1992.

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Adria, Marco. Peter Gzowski: An electric life. ECW Press, 1994.

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Hickman, Ian. Hickman's analog and RF circuits. Newnes, 1998.

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Hagen, Jon B. Radio-frequency electronics: Circuits and applications. 2nd ed. Cambridge University Press, 2009.

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Williams, Ralph. A. Atwater Kent: The man, the manufacturer, and his radios. Sonoran Pub., 2002.

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Hajimiri, Ali. The design of low noise oscillators. Kluwer Academic Publishers, 2003.

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Cappelli, Mark A. Electron density radial profiles derived from Stark broadening in a sodium plasma produced by laser resonance saturation. [s.n.], 1987.

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Tietaah, Gilbert K. M. Radio and elections 2000 in Ghana. Media Foundation for West Africa, 2001.

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Sharada, P. V. Radio-television and elections. Concept Pub. Co., 1998.

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Book chapters on the topic "Radius of electron"

1

Wolff, Milo. "Cosmology, the Quantum Universe, and Electron Spin." In Gravitation and Cosmology: From the Hubble Radius to the Planck Scale. Springer Netherlands, 2002. http://dx.doi.org/10.1007/0-306-48052-2_55.

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Ibison, M. "A Zpf-Mediated Cosmological Origin of Electron Inertia." In Gravitation and Cosmology: From the Hubble Radius to the Planck Scale. Springer Netherlands, 2002. http://dx.doi.org/10.1007/0-306-48052-2_49.

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Dehmelt, H. G., G. Gabrielse, K. Helmerson, et al. "Single Atomic Particle at Rest in Free Space: New Value for Electron Radius." In Springer Series in Optical Sciences. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-540-39664-2_1.

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Chakraborty, Akshoy Kumar. "Radial Electron Density Distribution." In Phase Transformation of Kaolinite Clay. Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1154-9_9.

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Jenkner, F. L. "Radial Nerve." In Electric Pain Control. Springer Vienna, 1995. http://dx.doi.org/10.1007/978-3-7091-3447-4_23.

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Okumura, Taiga, Noriko Yamaguchi, and Toshihiro Kogure. "Structure, Composition, and Physicochemical Properties of Radiocesium-Bearing Microparticles Emitted by the Fukushima Daiichi Nuclear Power Plant Accident." In Agricultural Implications of Fukushima Nuclear Accident (IV). Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9361-9_8.

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AbstractDuring the accident at TEPCO’s Fukushima Daiichi Nuclear Power Plant, radiocesium-bearing microparticles (CsMPs) were released from damaged reactors into the environment. These micron-sized spherical particles with high specific radioactivity have not been reported in previous nuclear accidents. Herein, the current understanding of the structure, composition, and physicochemical properties of CsMPs is summarized. Electron microscopy revealed that the CsMP matrix is composed of silicate glass containing Na, Cl, K, Fe, Zn, Rb, Sn, and Cs as major constituents. These elements are often inhomogeneously distributed, depending on the particle radius, and Cs was concentrated around the outer side of the particles. In addition, nanocrystals including Cr-rich oxides and chalcogenides were frequently found inside CsMPs. The average valence state of Fe in the CsMP glass matrix was almost Fe2+, indicating formation under a reducing atmosphere through condensation from the gas phase. Radiocesium diffused away from the CsMPs when heated to >600 °C. Accordingly, CsMPs may lose their high specific radioactivity when related radiation-contaminated waste is incinerated at sufficiently high temperatures. Although CsMP solubility is low, they cannot be regarded as “insoluble” materials owing to their small size. CsMP dissolution rates depend on the pH and dissolved species in the solution, and their dissolution behavior is comparable to that of silica-rich glass. Based on these dissolution properties, a method for estimating CsMP abundance and spatial distribution in the environment was proposed. The findings detailed herein contribute to the comprehensive elucidation of CsMP environmental dynamics.

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Wei Li, Hong. "Hollow Beam Distribution of Energetic Electrons and Higher Harmonics of Electron Cyclotron Maser." In Radio Continua During Solar Flares. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4710-8_14.

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Bogdan, T. J., and R. Schlickeiser. "Stochastic Electron Acceleration in Stellar Coronae." In Radio Stars. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5420-5_2.

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Kirk, J. G., P. Duffy, and R. O. Dendy. "Electron Transport in the Coma Cluster." In Extragalactic Radio Sources. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0295-4_121.

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Despringre, V., and D. Fraix-Burnet. "Relativistic Electron-Positron Clouds in VLBI Jets." In Extragalactic Radio Sources. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0295-4_157.

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Conference papers on the topic "Radius of electron"

1

Alvarez, Roxanna B., Augusto Ruiz, and Mark F. Horstemeyer. "Pitting Corrosion Study in an AE 44 Magnesium Alloy." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08232.

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Abstract The initiation and growth mechanisms of corrosion pits in an AE44 magnesium alloy, subjected to a wet saline environment, were quantified, and a corrosion mode to explain the phenomena is suggested. Immersion test were carried out in a NaCl 3.5% solution, for different surfaces at room temperature. The corrosion process was evaluated using a laser profilemeter (LP), optical microscopy (OM), scanning electron microscopy (SEM) and energy dispersive X-Ray spectroscopy (EDS). The stereological quantities included the pit density number, pit radius, pit size distribution, and pit coalescence area. A pit corrosion evolution was estimated using the data obtained from the laser Profilemeter. The study found two different corrosion modes: general corrosion, localized pitting, followed by pit coalescence. General corrosion is caused by dissolution and regeneration of a protective film in the presence of chloride salts, while the localized corrosion begins as the result of the preferential dissolution of Magnesium due to the galvanic cell. General corrosion occurred during the whole experience, whereas localized pitting was dominant at the beginning of the exposure, followed by pit coalescence prevailing over longer time periods.

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Sharma, Ankit, Samit K. Ray, and K. V. Adarsh. "Breaking of Phonon Bottleneck In CsPbI3 Nanocrystals Due To Efficient Auger Recombination." In JSAP-Optica Joint Symposia. Optica Publishing Group, 2024. https://doi.org/10.1364/jsapo.2024.17a_a31_5.

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Inorganics lead halide perovskite (LHP) have been became appropriate system for demonstrating light-matter interaction due to their flexible bandgap tunability, defect tolerance and high photoluminescence quantum yield nature. Although, LHPs have many hallmark properties which can support highly efficient photovoltaic devices, but they lost lot of energy in carriers-phonon scattering which slow down the recombination process and decrease the efficiency. Faster thermalization time of hot carriers support electron-hole recombination at band-edge which can be exploited in optoelectronic devices either by incorporating electrons/holes transport layer for photovoltaic or fast recombination for LED. Recently, efficient photovoltaic and light emitting devices are immediate requirement for high-speed quantum technologies. Here, we have chosen CsPbI3 and Cu-doped CsPbI3 nanocrystals (NCs) and addressed both issues simultaneously by using transient absorption spectroscopy. Our sample can be classified as an intermediate confinement as the size of NCs is 16 nm (32 nm) for CsPbI3 (Cu-doped CsPbI3) NCs which are higher than Bohr’s radius (~12 nm), and give sharp excitonic peaks in ground state optical absorption with excitonic position at ~2.1 eV. Further, by femtosecond laser excitation with 400 nm and 120 fs pulse width, which is generated by second harmonic of fundamental wavelength 800 nm. The fluence-dependent measurement revealed the many-body interaction and hot carriers dynamics. At higher fluence, say 150 μJ/cm2 and above, pristine CsPbI3 NCs shows breaking of phonon bottleneck effect by fast decay while Cu-doped NCs showed slow thermalization. To get insight, we have calculated Auger recombination (non-radiative) lifetime by subtractive method. The lifetime measurements clearly distinguished the appearance of contrast results due to efficient Auger process associated with pristine CsPbI3 NCs. Thus, our results provide insight to incorporate metal doping and understanding about hot carrier dynamics for solar energy harvesting.

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3

Sarzała, Robert P., Dominika Dąbrówka, and Maciej Dems. "Impact of Bottom DBR Radius and Electric Aperture Radius on GaN VCSEL Operation." In 2024 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD). IEEE, 2024. http://dx.doi.org/10.1109/nusod62083.2024.10723577.

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4

Dehmelt, Hans. "Geonium spectra⋅electron radius⋅cosmon." In HIGH−ENERGY SPIN PHYSICS/EIGHTH INTERNATIONAL SYMPOSIUM. AIP, 1989. http://dx.doi.org/10.1063/1.38228.

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5

Weidman, Daniel J., M. J. Rhee, Ralph F. Schneider, K. T. Nguyen, and Robert A. Stark. "Intense electron-beam radius-tailoring experiment." In OE/LASE '92, edited by Howard E. Brandt. SPIE, 1992. http://dx.doi.org/10.1117/12.137139.

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6

Zhang, S. C., and J. N. Elgin. "Electron-beam conditioning for free-electron lasers and masers." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.ctuk93.

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Abstract:

Both theoretical and experimental investigations have indicated that the spread of the electron beam (e-beam) limits the operating wavelength, gain, and efficiency of the free-electron lasers and masers. Recently, several authors proposed methods of e-beam conditioning.1-3 Here we present a novel method of conditioning the e-beam by using a tapered, reversed axial guide magnetic field. The results of nonlinear 3-D simulation have confirmed our proposal. In the simulation we consider a solid e-beam having radius Rb = 0.25 cm, energy Eb = 750 keV, and current Ib = 300 A in a cylindrical waveguide with radius Rw = 0.51 cm, where an axial guide field Bz and 3-D wiggler with amplitude Bw and period lw = 3.18 cm govern the electrons and 5000 electrons with the initial state of Gaussian random distribution are tested.

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7

Higinbotham, Douglas. "Extractions of the Proton Radius From Electron Scattering Data." In APS Southeastern Section (84th Annual Meeting), Milledgeville, GA, November 16, 2017. US DOE, 2017. http://dx.doi.org/10.2172/1985978.

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8

Flytzanis, C., F. Hache, D. Ricard, and P. Roussignol. "Optical nonlinearities in quantum confined semiconductor microcrystallites in glasses." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.thu1.

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Abstract:

We review the main aspects of the light and electric field-induced refractive index and absorption changes in quantum confined semiconductor microcrystallites in glasses. In microcrystallites of a radius smaller than the electron radius the quantum size effects lead to drastic modifications of the electron and hole states and their dynamics. This is in particular reflected in a quantum size enhancement of the optical Kerr coefficient.

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9

Weiss, Christian. "Precise determination of proton magnetic radius from electron scattering data." In IWHSS 2020 (17th International Workshop on Hadron Structure and Spectroscopy), Trieste, Italy (virtual), November 16, 2020. US DOE, 2020. http://dx.doi.org/10.2172/1974363.

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10

Jain, Ashutosh. "Theoretical Computing of Nanocontact Resistance Between Atomic Force Microscope Tip and Gold Nanoparticles During Nanoindentation." In ASME 4th Integrated Nanosystems Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/nano2005-87041.

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Abstract:

Electrical characterization of nanostructures is useful in electronic applications as conducting wires, field-effect transistors, and single-electron tunneling transistors. The present work deals with the theoretical modeling of nanocontact resistance developed due to nanoindentation of the AFM tip on the gold nanoparticle. Validity of Maxwell and Sharvin model is discussed. Since the Fermi wavelength of the electrons in gold is smaller (0.5 nm) as compared with the contact radius of the tip (∼8–10 nm) hence Sharvin’s approach is used to predict the nanocontact resistance. The radius of contact between the tip and nanoparticle is given by Hertz formula which combines the elastic properties of the tip and the sample using effective elastic modulus. Two different types of tip — silicon tip and silicon tip coated with aluminium — are considered for the analysis. The variation of contact radius with the tip radius for two types of tips at specified contact forces during nanoindentation is shown. The dependence of the contact resistance on the contact radius is shown for two tips and interpreted in the physical domain.

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Reports on the topic "Radius of electron"

1

Kwan, T. J. T., B. G. DeVolder, J. C. Goldstein, and C. M. Snell. Study of a non-intrusive electron beam radius diagnostic. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/563283.

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2

Jiao, Yi, J. Wu, Y. Cai, et al. Efficiency Enhancement in a Tapered Free Electron Laser by Varying the Electron Beam Radius. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1035087.

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3

Saenboonruang, Kiadtisak. Measurement of the Neutron Radius of ²⁰⁸Pb Through Parity Violation in Electron Scattering. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1079207.

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4

Krueger, Henning. Investigation of elastic hadron electron scattering at 540 GeV/c in order to measure the electromagnetic charge radius of the proton. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/1421421.

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5

van der Heijden, Joost. Optimizing electron temperature in quantum dot devices. QDevil ApS, 2021. http://dx.doi.org/10.53109/ypdh3824.

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Abstract:

The performance and accuracy of quantum electronics is substantially degraded when the temperature of the electrons in the devices is too high. The electron temperature can be reduced with appropriate thermal anchoring and by filtering both the low frequency and radio frequency noise. Ultimately, for high performance filters the electron temperature can approach the phonon temperature (as measured by resistive thermometers) in a dilution refrigerator. In this application note, the method for measuring the electron temperature in a typical quantum electronics device using Coulomb blockade thermometry is described. This technique is applied to find the readily achievable electron temperature in the device when using the QFilter provided by QDevil. With our thermometry measurements, using a single GaAs/AlGaAs quantum dot in an optimized experimental setup, we determined an electron temperature of 28 ± 2 milli-Kelvin for a dilution refrigerator base temperature of 18 milli-Kelvin.

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6

Mostrom, M. A., and T. J. T. Kwan. Radial electron-beam-breakup transit-time oscillator. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/10116207.

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7

Tang, C. M., P. Sprangle, A. Ting, and B. Hafizi. Radio Frequency Linac Driven Free-Electron Laser Configurations. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada212572.

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8

C.K. Phillips, J.C. Hosea, M. Ono, and J.R. Wilson. Effects of Radial Electric Fields on ICRF Waves. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/787679.

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9

Batchelor, K., J. Sheehan, and M. Woodle. Design and modelling of a 5 MeV radio frequency electron gun. Office of Scientific and Technical Information (OSTI), 1988. http://dx.doi.org/10.2172/6771848.

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10

Hahm, T. S., and W. M. Tang. Influence of radial electric field on Alfven-type instabilities. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/142539.

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