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Artículos de revistas sobre el tema "Bremsstrahlung,plasma"

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Publicado: 4 de junio de 2021
Última modificación: 6 de febrero de 2022

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1

Ishihara, Osamu y Akira Hirose. "Plasma Turbulent Bremsstrahlung". Physical Review Letters 72, n.º 26 (27 de junio de 1994): 4090–92. http://dx.doi.org/10.1103/physrevlett.72.4090.

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2

MAHDAVI, M., B. KALEJI y T. KOOHROKHI. "BREMSSTRAHLUNG RADIATION IN DEUTERIUM/TRITIUM DEGENERATE PLASMA". Modern Physics Letters B 24, n.º 30 (10 de diciembre de 2010): 2939–45. http://dx.doi.org/10.1142/s0217984910025231.

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The Bremsstrahlung radiation power is one of the important loss processes in the inertial confinement fusion. The motion of ions is usually neglected when calculating the Bremsstrahlung radiation of the plasma. We calculate the Bremsstrahlung radiation power by taking into account the motion of ions in degenerate plasma. We found a two-temperature function for Bremsstrahlung radiation of the plasma. Finally, the Bremsstrahlung optical depth is obtained for plasma.
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3

JUNG, YOUNG-DAE y CHANG-GEUN KIM. "Classical bremsstrahlung radiation from electron–ion encounters in a nonideal plasma". Journal of Plasma Physics 67, n.º 2-3 (abril de 2002): 191–97. http://dx.doi.org/10.1017/s002237780100157x.

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The classical electron–ion Coulomb bremsstrahlung process is investigated in a nonideal plasma. An effective pseudopotential model taking into account plasma-screening and collective effects is applied to describe the electron-ion interaction potential in a nonideal plasma. The screened hyperbolic-orbit trajectory method is applied to the motion of the projectile electron in order to investigate the bremsstrahlung radiation cross-section as a function of the scaled impact parameter, eccentricity, nonideal-plasma parameter, Debye length, projectile energy, and photon energy. It is found that the collective effect reduces the bremsstrahlung radiation cross-section on both the soft- and hard-photon cases. For small impact parameters, the nonideal-plasma effect on the bremsstrahlung radiation cross-section is found to be quite small. It is also found that the maximum position of the bremsstrahlung radiation cross-section gets closer to the target ion with increasing nonideal-plasma effect.
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4

MAHDAVI, M. y S. F. GHAZIZADEH. "RADIATION EMISSION AND RE-ABSORPTION MECHANISMS IN DENSE MEDIUMS". Modern Physics Letters B 26, n.º 24 (21 de agosto de 2012): 1250157. http://dx.doi.org/10.1142/s0217984912501576.

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In this paper, the Bremsstrahlung emission and re-absorption mechanisms are studied mainly through Inverse Bremsstrahlung and Compton Scattering. The Radiation Specific Power is calculated numerically assuming the suitable forms of Energy Distribution Function in plasma conditions. The calculation of Spectral Emission shows that, the Bremsstrahlung emission is strongly forward and backward peak relative to electron direction in overdense and high temperature plasma. Finally, some of the conditions for dominant of the re-absorption mechanism are explained.
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5

Kim, Hwa-Min y Young-Dae Jung. "Collective Effects on the Transition Bremsstrahlung Spectrum due to the Polarization Interaction in Nonideal Plasmas". Zeitschrift für Naturforschung A 64, n.º 1-2 (1 de febrero de 2009): 49–53. http://dx.doi.org/10.1515/zna-2009-1-208.

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The collective effects on the transition bremsstrahlung spectrum due to the polarization interaction between the electron and Debye shielding cloud of an ion are investigated in nonideal plasmas. The impact parameter analysis with the effective pseudopotential model taking into account the nonideal collective and plasma screening effects is applied to obtain the bremsstrahlung radiation cross-section as a function of the nonideality plasma parameter, Debye length, photon energy, and projectile energy. It is shown that the collective effects enhance the bremsstrahlung radiation cross-section and decrease with increasing impact parameter. It is also shown that the collective effect is the most significant near the maximum position of the bremsstrahlung cross-section. In addition, it is shown that the collective effect decreases with an increase of the radiation photon energy
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6

Tsytovich, V. N., R. Bingham, U. de Angelis y A. Forlani. "Collective effects in bremsstrahlung in plasmas". Journal of Plasma Physics 56, n.º 1 (agosto de 1996): 127–47. http://dx.doi.org/10.1017/s0022377800019140.

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The results of recent developments in the theory of fluctuations in plasmas show that the previously used theory of bremsstrahlung is incomplete and the exact expressions for bremsstrahlung should include transition bremsstrahlung. The collective effects in bremsstrahlung known previously as Debye screening are changed to a qualitatively different structure, which removes the effect of ion polarization in bremsstrahlung and introduces a new effective polarization which depends on an effective ion charge and electron velocity. The results may be relevant for applications in plasmas when the wavelength is greater than the Debye length. It is shown that for the problem of photon transport in the solar interior the correct collective corrections to the bremsstrahlung change the opacity by only about −0·35%, which is less than was calculated previously when collective effects in bremsstrahlung where estimated without taking recent results of plasma fluctuation theory into account.
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7

Bendib, K., A. Bendib, K. Bendib, A. Bendib, A. Sid y K. Bendib. "Weibel instability analysis in laser-produced plasmas". Laser and Particle Beams 16, n.º 3 (septiembre de 1998): 473–90. http://dx.doi.org/10.1017/s0263034600011289.

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Analytic analysis of collisionless Weibel modes in laser-created plasmas is presented. The heat flux (HF), the plasma expansion (PE), and the inverse bremsstrahlung absorption (IBA) sources have been investigated. It has been shown that for short laser wavelengths (λL < 1 µm) and high laser fluxes (I > 1014 W/cm2), the inverse bremsstrahlung absorption is the most efficient Weibel mechanism for producing strong magnetic fields in the vicinity of the critical layer. For large laser wavelengths (λL < 10 µm), the production of the magnetic fields in the vicinity of the critical layer, due to the plasma expansion mechanism, is as important as the ones due to the thermal transport and the inverse bremsstrahlung absorption mechanisms. Useful scaling laws of convective e-foldings, with respect to the laser and the plasma parameters, are also derived.
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8

Tsytovich, Vadim N. "Collective effects of plasma particles in bremsstrahlung". Uspekhi Fizicheskih Nauk 165, n.º 1 (1995): 89–111. http://dx.doi.org/10.3367/ufnr.0165.199501c.0089.

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9

Tsytovich, Vadim N. "Collective effects of plasma particles in bremsstrahlung". Physics-Uspekhi 38, n.º 1 (31 de enero de 1995): 87–108. http://dx.doi.org/10.1070/pu1995v038n01abeh000065.

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10

Silin, V. P. "On coherent harmonic bremsstrahlung in laser plasma". Journal of Experimental and Theoretical Physics 87, n.º 3 (septiembre de 1998): 468–77. http://dx.doi.org/10.1134/1.558683.

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11

Hoon Kim, Shang. "Net Inverse Bremsstrahlung Acceleration in Plasma Waves". Journal of the Physical Society of Japan 61, n.º 1 (15 de enero de 1992): 131–48. http://dx.doi.org/10.1143/jpsj.61.131.

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12

Melkumova, E. Yu. "Plasma gravi-bremsstrahlung in TeV-scale gravity". Gravitation and Cosmology 17, n.º 1 (enero de 2011): 56–60. http://dx.doi.org/10.1134/s0202289311010154.

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13

Firouzi Farrashbandi, N. y M. Eslami-Kalantari. "Inverse bremsstrahlung absorption in laser-fusion plasma". Journal of Theoretical and Applied Physics 14, n.º 3 (3 de mayo de 2020): 261–64. http://dx.doi.org/10.1007/s40094-020-00375-4.

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14

Jung, Young-Dae y Woo-Pyo Hong. "Influence of the Dynamic Quantum Shielding on the Transition Bremsstrahlung Spectrum and the Gaunt Factor in Strongly Coupled Semiclassical Plasmas". Zeitschrift für Naturforschung A 68, n.º 1-2 (1 de febrero de 2013): 165–71. http://dx.doi.org/10.5560/zna.2012-0099.

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The influence of the dynamic quantum shielding on the transition bremsstrahlung spectrum is investigated in strongly coupled semiclassical plasmas. The effective pseudopotential and the impact parameter analysis are employed to obtain the bremsstrahlung radiation cross section as a function of the de Broglie wavelength, Debye length, impact parameter, radiation photon energy, projectile energy, and thermal energy. The result shows that the dynamic screening effect enhances the transition bremsstrahlung radiation cross section. It is found that the maximum position of the transition bremsstrahlung process approaches to the center of the shielding cloud with increasing thermal energy. It is also found that the dynamic screening effect on the bremsstrahlung radiation cross section decreases with an increase of the quantum character of the semiclassical plasma. In addition, it is found that the peak radiation energy increases with an increase of the thermal energy. It is also found that the dynamic quantum screening effect enhances the bremsstrahlung Gaunt factor, especially for the soft-photon case.
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15

Mahdieh, Mohammad Hossein y Sahar Hosseinzadeh. "Numerical study of radiative opacity for carbon and aluminum plasmas produced by high power pulsed lasers". Laser and Particle Beams 31, n.º 2 (9 de mayo de 2013): 273–88. http://dx.doi.org/10.1017/s0263034613000244.

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AbstractIn this paper, the opacity of plasma in local thermodynamic equilibrium condition was investigated numerically. The plasma was assumed to be produced by interaction of high power pulse laser with carbon and aluminum. Spectrally resolved opacities under different plasma temperature and density conditions were calculated and radiative absorption due to three absorption mechanisms; inverse bremsstrahlung, photo-ionization, and line absorption in plasmas was studied numerically. The purpose of this study is to calculate the values of absorption for inverse bremsstrahlung and photo-ionization processes for aluminum and carbon plasmas and to compare them for those of cold matter. In this investigation, the influences of density and temperature on plasma absorption were evaluated. The calculation results show that the opacity strength strongly depends on the plasma temperature and density.
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16

Kumwenda, M. J., J. K. Ahn, J. W. Lee, I. J. Lugendo, S. J. Kim, J. Y. Park y M. S. Won. "Angular distributions of bremsstrahlung photons from ECR plasma". Journal of the Korean Physical Society 71, n.º 11 (19 de noviembre de 2017): 780–84. http://dx.doi.org/10.3938/jkps.71.780.

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17

Selikhov, Alexei V. "Non-Abelian bremsstrahlung in a quark-gluon plasma". Physical Review C 48, n.º 5 (1 de noviembre de 1993): 2476–82. http://dx.doi.org/10.1103/physrevc.48.2476.

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18

Luo, Bin y Shuang-Nan Zhang. "Thermal Bremsstrahlung Radiation in a Two-Temperature Plasma". Chinese Journal of Astronomy and Astrophysics 4, n.º 3 (junio de 2004): 275–78. http://dx.doi.org/10.1088/1009-9271/4/3/275.

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19

Lamoureux, M. "Interest of electron–ion bremsstrahlung for plasma physics". Radiation Physics and Chemistry 59, n.º 2 (agosto de 2000): 171–80. http://dx.doi.org/10.1016/s0969-806x(00)00288-7.

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20

Klimontovich, Yu L., A. Yu Shevchenko, I. P. Yakimenko y A. G. Zagorodny. "Statistical Theory of Bremsstrahlung in Plasma-Molecular Systems". Contributions to Plasma Physics 29, n.º 6 (1989): 551–87. http://dx.doi.org/10.1002/ctpp.2150290602.

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21

Silin, V. P. y P. V. Silin. "Nonlinear inverse bremsstrahlung absorption in a photoionized plasma". Plasma Physics Reports 28, n.º 11 (noviembre de 2002): 936–45. http://dx.doi.org/10.1134/1.1520287.

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22

Cleymans, J., V. V. Goloviznin y K. Redlich. "Virtual-photon bremsstrahlung in a quark-gluon plasma". Physical Review D 47, n.º 3 (1 de febrero de 1993): 989–97. http://dx.doi.org/10.1103/physrevd.47.989.

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23

Weber, B. V., D. D. Hinshelwood, D. P. Murphy, S. J. Stephanakis y V. Harper-Slaboszewicz. "Plasma-Filled Diode for High Dose-Rate Bremsstrahlung". IEEE Transactions on Plasma Science 32, n.º 5 (octubre de 2004): 1998–2003. http://dx.doi.org/10.1109/tps.2004.835945.

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24

Guo, Liang, Jian Zheng, Bin Zhao y Ding Li. "Bremsstrahlung radiation from a non-relativistic pair plasma". Plasma Physics and Controlled Fusion 50, n.º 12 (31 de octubre de 2008): 125004. http://dx.doi.org/10.1088/0741-3335/50/12/125004.

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25

MAHDAVI, M. y T. KOOHROKHI. "ENERGY LEAKAGE PROBABILITY EFFECT ON IGNITION CONDITION IN AN INERTIAL CONFINEMENT FUSION PLASMA". International Journal of Modern Physics B 25, n.º 27 (30 de octubre de 2011): 3611–22. http://dx.doi.org/10.1142/s0217979211101983.

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For a weak to moderately coupled plasma, the charged particle stopping power dE/dx was recently calculated from first principles in Ref. 1 using the method of dimensional continuation.2 While the calculational techniques were imported from quantum field theory, the calculation itself lies squarely within the standard framework of convergent kinetic equations. By using these calculations, ignition condition regime in (D/Tx/3Hey) fusion fuel pellet is investigated, including energy deposition fraction of charged particles and neutrons in fuel pellet, bremsstrahlung and inverse bremsstrahlung radiation, inverse Compton scattering and thermal conduction losses.
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26

Singh, Sushil, Chris D. Armstrong, Ning Kang, Lei Ren, Huiya Liu, Neng Hua, Dean R. Rusby et al. "Bremsstrahlung emission and plasma characterization driven by moderately relativistic laser–plasma interactions". Plasma Physics and Controlled Fusion 63, n.º 3 (6 de enero de 2021): 035004. http://dx.doi.org/10.1088/1361-6587/abcf7e.

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27

ELIEZER, SHALOM, PABLO T. LEÓN, JOSÉ M. MARTINEZ-VAL y DIMITRI V. FISHER. "Radiation loss from inertially confined degenerate plasmas". Laser and Particle Beams 21, n.º 4 (octubre de 2003): 599–607. http://dx.doi.org/10.1017/s0263034603214191.

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Bremsstrahlung is one of the most important energy loss mechanisms in achieving ignition, which is only possible above a threshold in temperature for a given fusion reaction and plasma conditions. A detailed analysis of the bremsstrahlung process in degenerate plasma points out that radiation energy loss is much smaller than the value given by the classical formulation. This fact seems not useful to relax ignition requirements in self-ignited targets, because it is only relevant at extremely high densities. On the contrary, it can be very positive in the fast ignition scheme, where the target is compressed to very high densities at a minimum temperature, before the igniting beamlet is sent in.
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28

Mahdavi, M., T. Koohrokhi y Z. Barfami. "The Effect of Energy Leakage Probability on Burn Propagation in an Optically Thick Fusion Plasma". ISRN High Energy Physics 2012 (2012): 1–10. http://dx.doi.org/10.5402/2012/838394.

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In an optically thick plasma, the mean free path of bremsstrahlung photons is smaller than the plasma radius, and radiation can be treated as a photon gas in thermal equilibrium. In these conditions, the black body radiation spectrum exceeds the number of hot photons, and reabsorption processes such as inverse bremsstrahlung radiation and inverse Compton scattering become important. It has been shown that a dense fusion plasma like the one being used in ICF method is initially optically thick. When the fuel pellet is burning, the temperature of its electrons rises (approximately greater than 90 KeV), and the pellet becomes rapidly optically thin. In this paper, we have shown that the energy leakage probability makes electron temperature remain low (approximately smaller than 55 KeV), and as a result the fuel pellet remains optically thick during burning.
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29

Fortmann, C., R. Redmer, H. Reinholz, G. Röpke, A. Wierling y W. Rozmus. "Bremsstrahlung vs. Thomson scattering in VUV-FEL plasma experiments". High Energy Density Physics 2, n.º 3-4 (octubre de 2006): 57–69. http://dx.doi.org/10.1016/j.hedp.2006.04.001.

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30

LAMOUREUX, M., R. H. PRATT y L. JACQUET. "X-RAY BREMSSTRAHLUNG EMISSION DUE TO PLASMA SUPERTHERMAL ELECTRONS". Le Journal de Physique Colloques 48, n.º C9 (diciembre de 1987): C9–355—C9–358. http://dx.doi.org/10.1051/jphyscol:1987961.

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31

Ferrante, G., M. Zarcone y S. A. Uryupin. "Inverse bremsstrahlung in a plasma with electron temperature anisotropy". Physics of Plasmas 8, n.º 11 (noviembre de 2001): 4745–52. http://dx.doi.org/10.1063/1.1405014.

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32

Haug, E. "Bremsstrahlung energy loss of electrons passing through a plasma". Astronomy & Astrophysics 423, n.º 3 (12 de agosto de 2004): 793–95. http://dx.doi.org/10.1051/0004-6361:20040377.

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33

Nozawa, Satoshi, Naoki Itoh y Yasuharu Kohyama. "Relativistic Thermal Bremsstrahlung Gaunt Factor for the Intracluster Plasma". Astrophysical Journal 507, n.º 2 (10 de noviembre de 1998): 530–57. http://dx.doi.org/10.1086/306352.

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34

Sid, A. "Nonlinear inverse bremsstrahlung absorption in laser-fusion plasma corona". Physics of Plasmas 10, n.º 1 (enero de 2003): 214–19. http://dx.doi.org/10.1063/1.1523395.

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35

Friedlein, Rainer y Günter Zschornack. "Angle dispersive de-convolution of bremsstrahlung spectra from plasma". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 349, n.º 2-3 (octubre de 1994): 554–57. http://dx.doi.org/10.1016/0168-9002(94)91226-2.

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36

Schultheiss, Christoph y Frank Hoffmann. "Observation of directed bremsstrahlung from a hollow cathode plasma". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 51, n.º 2 (agosto de 1990): 187–91. http://dx.doi.org/10.1016/0168-583x(90)90521-u.

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37

Xu Miao-Hua, Liang Tian-Jiao y Zhang Jie. "Bremsstrahlung diagnostics of hot electrons in laser-plasma interactions". Acta Physica Sinica 55, n.º 5 (2006): 2357. http://dx.doi.org/10.7498/aps.55.2357.

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38

Oussama, Boultif, Ghezal Abdenasser y Abdelaziz Sid. "Electron-ion inverse bremsstrahlung absorption in magnetized fusion plasma". EPL (Europhysics Letters) 133, n.º 5 (1 de marzo de 2021): 55001. http://dx.doi.org/10.1209/0295-5075/133/55001.

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39

IGLESIAS, CARLOS A. "Comment on ‘Collective effects in bremsstrahlung in plasmas’". Journal of Plasma Physics 58, n.º 2 (agosto de 1997): 381–83. http://dx.doi.org/10.1017/s0022377897005825.

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In a recent study Tsytovich et al. [J. Plasma Phys. 56, 127 (1996)] claimed to obtain new expressions for electron–ion bremsstrahlung in plasmas. It is shown, however, that they interpreted earlier work incorrectly and simply reproduced well-known results.
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40

Thompson, W. B. "The stimulated emission of Bremsstrahlung in a fully ionized plasma". Laser and Particle Beams 6, n.º 3 (agosto de 1988): 513–23. http://dx.doi.org/10.1017/s0263034600005437.

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The process of induced bremsstrahlung is studied and it is found that anisotropy in the electron distribution can lead to the amplification of radiation. The gain rate is ,Λ where ν is the electron-ion collision frequency, ωp and ω the plasma and radiation frequency, and Λ a numerical factor which is positive only for anisotropic distributions.
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41

ISSAC, R., J. WIRTHIG, E. BRUNETTI, G. VIEUX, B. ERSFELD, S. P. JAMISON, D. JONES, R. BINGHAM, D. CLARK y D. A. JAROSZYNSKI. "Bright source of Kα and continuum X rays by heating Kr clusters using a femtosecond laser". Laser and Particle Beams 21, n.º 4 (octubre de 2003): 535–40. http://dx.doi.org/10.1017/s0263034603214099.

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X rays emitted from Kr clusters illuminated by a femtosecond laser have been observed over a wide spectral region from 3 keV to 15 keV. The measured spectra are characterized by a broad bremsstrahlung continuum and Kα, β lines at 12.66 keV and 14.1 keV. To the best of the authors' knowledge, this is the first observation of Kα, β emission from laser-heated Kr clusters. The bremsstrahlung continuum arising from collisions in the plasma implies a population of hot electrons consistent with a temperature of several kiloelectron volts. The absolute X-ray yield in the 3–15 keV region is found to be of the order of 107 photons per laser pulse. The plasma temperature, estimated from the continuum part of the spectrum as a function of laser intensity and X-ray yield as a function of laser pulse duration, are studied.
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42

Itoh, Naoki. "Neutrino Emission Processes in the Weinberg-Salam Theory". International Astronomical Union Colloquium 108 (1988): 434–35. http://dx.doi.org/10.1017/s025292110009429x.

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The neutrino emission processes play essential roles in stellar evolution as expemplified by the observations of the neutrinos from SN 1987a by the KAMIOKANDE-II and IMB experiments. Recently a very extensive study of the various neutrino emission processes based on the Weinberg-Salam theory has been completed by the present author and his collaborators. The neutrino emission processes calculated by the author’s group include pair, photo-, plasma, and bremsstrahlung neutrino processes. The neutrino energy loss rates due to pair, photo-, and plasma processes in the framework of the Weinberg-Salam theory are found to be substantially lower than the result obtained by Beaudet, Petrosian, and Salpeter. The reduction factor α is in the range 0.35 < α < 0.88 depending on the neutrino masses, density, and temperature. The ionic correlation effects play important roles in the bremsstrahlung neutrino process. The present author and his collaborators recently calculated the bremsstrahlung neutrino energy loss rate taking into account the ionic correlation effects in the crystalline lattice state as well as in the liquid metal state. They found that the ionic correlation effects suppress the bremsstrhlung neutrino energy loss typically by a factor 2-20. The present findings will bear great importance in neutrino astronomy.
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43

Jung, Young-Dae y Daiji Kato. "Turbulence Effects on Bremsstrahlung Emission in the Turbulent Solar Plasma". Publications of the Astronomical Society of Japan 64, n.º 1 (25 de febrero de 2012): 19. http://dx.doi.org/10.1093/pasj/64.1.19.

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44

Wiggins, D. L., C. T. Raynor y J. A. Johnson. "Evidence of inverse bremsstrahlung in laser enhanced laser-induced plasma". Physics of Plasmas 17, n.º 10 (octubre de 2010): 103303. http://dx.doi.org/10.1063/1.3501995.

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45

Silin, Viktor P. "Coherent bremsstrahlung generation of harmonics in a laser-produced plasma". Quantum Electronics 29, n.º 1 (31 de enero de 1999): 11–18. http://dx.doi.org/10.1070/qe1999v029n01abeh001403.

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46

Kasthurirangan, S., A. N. Agnihotri, C. A. Desai y L. C. Tribedi. "Temperature diagnostics of ECR plasma by measurement of electron bremsstrahlung". Review of Scientific Instruments 83, n.º 7 (julio de 2012): 073111. http://dx.doi.org/10.1063/1.4738642.

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47

Astapenko, V. A. "Polarization bremsstrahlung from a fast structural ion in a plasma". Plasma Physics Reports 34, n.º 10 (octubre de 2008): 860–66. http://dx.doi.org/10.1134/s1063780x08100073.

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48

WIERLING, A., Th MILLAT y G. RPKE. "Classical bremsstrahlung in a non-ideal plasma with effective interaction". Journal of Plasma Physics 70, n.º 2 (abril de 2004): 185–97. http://dx.doi.org/10.1017/s0022377803002538.

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Chaurasia, S., S. Tripathi, P. Leshma, C. G. Murali y J. Pasley. "Optimization of bremsstrahlung and characteristic line emission from aluminum plasma". Optics Communications 308 (noviembre de 2013): 169–74. http://dx.doi.org/10.1016/j.optcom.2013.07.001.

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Korsakov, V. B. y G. D. Fleishman. "On polarization of transition bremsstrahlung in a weakly gyrotropic plasma". Radiophysics and Quantum Electronics 38, n.º 9 (septiembre de 1995): 577–80. http://dx.doi.org/10.1007/bf01037838.

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