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Journal articles on the topic 'Relativistic intensity'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Chang, Yifan, Chang Wang, Yubo Wang, Zhaonan Long, Zirui Zeng та Youwei Tian. "Collimation and monochromaticity of γ-rays generated by high-energy electron colliding with tightly focused circularly polarized laser with varied intensities". Laser Physics Letters 19, № 6 (2022): 065301. http://dx.doi.org/10.1088/1612-202x/ac6614.

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Abstract The collision of high-energy electron and laser pulses produces nonlinear inverse Thomson scattering, which can generate γ-rays. We study the effect of laser intensity on the energy angular distribution and spectrum of γ-ray radiation in tightly focused pulses. The γ-rays at non-relativistic intensity have good collimation and monochromaticity, and the radiation energy increases with the laser intensity. The ‘jumping point’ phenomenon of radiation energy variation under relativistic intensity and the ‘black hole’ of energy angular distribution were discovered. As the laser intensity i

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2

Liesfeld, Ben, Jens Bernhardt, Kay-Uwe Amthor, Heinrich Schwoerer, and Roland Sauerbrey. "Single-shot autocorrelation at relativistic intensity." Applied Physics Letters 86, no. 16 (2005): 161107. http://dx.doi.org/10.1063/1.1905779.

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3

Клименко, Владимир, and Vladimir Klimenko. "Sky-distribution of intensity of synchrotron radio emission of relativistic electrons trapped in Earth’s magnetic field." Solar-Terrestrial Physics 3, no. 4 (2017): 32–43. http://dx.doi.org/10.12737/stp-34201704.

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This paper presents the calculations of synchrotron radio emission intensity from Van Allen belts with Gaussian space distribution of electron density across L-shells of a dipole magnetic field, and with Maxwell’s relativistic electron energy distribution. The results of these calculations come to a good agreement with measurements of the synchrotron emission intensity of the artificial radiation belt’s electrons during the Starfish nuclear test. We have obtained two-dimensional distributions of radio brightness in azimuth — zenith angle coordinates for an observer on Earth’s surface. The west

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4

Friou, A., E. Lefebvre, and L. Gremillet. "Channeling dynamics of relativistic-intensity laser pulses." Physics of Plasmas 19, no. 2 (2012): 022704. http://dx.doi.org/10.1063/1.3680613.

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5

Lee, P. H. Y. "On relativistic self focusing." Laser and Particle Beams 5, no. 1 (1987): 15–25. http://dx.doi.org/10.1017/s0263034600002457.

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Ponderomotive force initiated laser self focusing can be enhanced by relativistic electron motion in a laser plasma. We derive the nonlinear refractive index due to relativistic effects and find that relativistic self focusing becomes important for a 0·25 μm laser when the laser intensity exceeds 5 × 1018 W/cm2.

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6

OSMAN, FREDERICK, REYNALDO CASTILLO, and HEINRICH HORA. "Relativistic and ponderomotive self-focusing at laser–plasma interaction." Journal of Plasma Physics 61, no. 2 (1999): 263–73. http://dx.doi.org/10.1017/s0022377898007417.

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The nonlinear plasma dielectric function due to relativistic electron motion is derived. From this, one can obtain the nonlinear refractive index of the plasma and estimate the importance of relativistic self-focusing in comparison with ponderomotive non-relativistic self-focusing at very high laser intensities. When the laser intensity is very high, ponderomotive self-focusing will be dominant. However, at some point, when the oscillating velocity of the plasma electrons becomes very large, relativistic effects will also play a role in self-focusing.

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7

Jolicoeur, Sheean, Roy Maartens, Eline M. De Weerd, Obinna Umeh, Chris Clarkson, and Stefano Camera. "Detecting the relativistic bispectrum in 21cm intensity maps." Journal of Cosmology and Astroparticle Physics 2021, no. 06 (2021): 039. http://dx.doi.org/10.1088/1475-7516/2021/06/039.

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8

Willingale, L., P. M. Nilson, C. Zulick, et al. "Relativistic intensity laser interactions with low-density plasmas." Journal of Physics: Conference Series 688 (March 2016): 012126. http://dx.doi.org/10.1088/1742-6596/688/1/012126.

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9

Marques, J. P., F. Parente та P. Indelicato. "Relativistic MCDF calculation of Kβ/Kα intensity ratios". Journal of Physics B: Atomic, Molecular and Optical Physics 34, № 17 (2001): 3487–91. http://dx.doi.org/10.1088/0953-4075/34/17/308.

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10

Leshchenko, V. E., V. A. Vasiliev, N. L. Kvashnin, and E. V. Pestryakov. "Coherent combining of relativistic-intensity femtosecond laser pulses." Applied Physics B 118, no. 4 (2015): 511–16. http://dx.doi.org/10.1007/s00340-015-6047-7.

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11

Douma, E., C. J. Rodger, L. W. Blum, T. P. O'Brien, M. A. Clilverd, and J. B. Blake. "Characteristics of Relativistic Microburst Intensity From SAMPEX Observations." Journal of Geophysical Research: Space Physics 124, no. 7 (2019): 5627–40. http://dx.doi.org/10.1029/2019ja026757.

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12

Mangles, S. P. D., K. Krushelnick, Z. Najmudin, et al. "The generation of mono-energetic electron beams from ultrashort pulse laser–plasma interactions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364, no. 1840 (2006): 663–77. http://dx.doi.org/10.1098/rsta.2005.1730.

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The physics of the interaction of high-intensity laser pulses with underdense plasma depends not only on the interaction intensity but also on the laser pulse length. We show experimentally that as intensities are increased beyond 10 20 W cm −2 the peak electron acceleration increases beyond that which can be produced from single stage plasma wave acceleration and it is likely that direct laser acceleration mechanisms begin to play an important role. If, alternatively, the pulse length is reduced such that it approaches the plasma period of a relativistic electron plasma wave, high-power inter

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13

Gaur, B., P. Rawat, and G. Purohit. "Effect of self-focused cosh Gaussian laser beam on the excitation of electron plasma wave and particle acceleration." Laser and Particle Beams 34, no. 4 (2016): 621–30. http://dx.doi.org/10.1017/s0263034616000525.

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AbstractThis work presents an investigation of the self-focusing of a high-power laser beam having cosh Gaussian intensity profile in a collissionless plasma under weak relativistic-ponderomotove (RP) and only relativistic regimes and its effect on the excitation of electron plasma wave (EPW), and particle acceleration process. Nonlinear differential equations have been set up for the beam width and intensity of cosh Gaussian laser beam (CGLB) and EPW using the Wentzel-Kramers-Brillouin and paraxial-ray approximations as well as fluid equations. The numerical results are presented for differen

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14

Клименко, Владимир, and Vladimir Klimenko. "Sky-distribution of intensity of synchrotron radio emission of relativistic electrons trapped in Earth’s magnetic field." Solnechno-Zemnaya Fizika 3, no. 4 (2017): 34–46. http://dx.doi.org/10.12737/szf-34201704.

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This paper presents the calculations of synchrotron radio emission intensity from Van Allen belts with Gaussian space distribution of electron density across L-shells of a dipole magnetic field, and with Maxwell’s relativistic electron energy distribution. The results of these calculations come to a good agreement with measurements of the synchrotron emission intensity of the artificial radiation belt’s electrons during the Starfish nuclear test. We have obtained two-dimensional distributions of radio brightness in azimuth — zenith angle coordinates for an observer on Earth’s surface. The west

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15

Shoucri, Magdi. "Comments on ‘Electromagnetic Surface Waves in a Relativistic Magnetized Plasma Propagating in a Cylindrical Column’ Applied Physics Research 16, 6 (2024)." Applied Physics Research 17, no. 1 (2025): 35. https://doi.org/10.5539/apr.v17n1p35.

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The dispersion relations of electromagnetic surface waves in a magnetized relativistic beam propagating in a cylindrical column surrounded by vacuum have been recently derived by Lee, 2024, using relativistic fluid equations. We would like to draw attention to an important body of work to study the problem of electromagnetic surface waves propagating at the surface of a relativistic beam, both in a cylindrical column and in cartesian geometry, and both in the absence and in the presence of an external magnetic field of arbitrary intensity.

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16

ASTHANA, MEENU V., DINESH VARSHNEY, and M. S. SODHA. "Relativistic self-focusing of transmitted laser radiation in plasmas." Laser and Particle Beams 18, no. 1 (2000): 101–7. http://dx.doi.org/10.1017/s0263034600181121.

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This paper presents an analysis of relativistic self-focusing of a Gaussian laser beam incident normally on a plane interface of a linear medium and a nonlinear, nonabsorbing plasma with an intensity dependent dielectric constant. Considering the nonlinearity to arise from the relativistic variation of mass and the Lorentz force on electrons. Following Wentzel–Kramers–Brillouin (WKB) and paraxial ray approximation the phenomenon of relativistic self-focusing of the transmitted laser radiation has been analyzed for the arbitrary magnitude of nonlinearity. Change in the intensity distribution al

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17

Asthana, Meenu, M. S. Sodha, and K. P. Maheshwari. "Relativistic self-focusing of laser beams in time-harmonic plane waves: arbitrary intensity." Journal of Plasma Physics 51, no. 1 (1994): 155–62. http://dx.doi.org/10.1017/s002237780001744x.

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This paper presents a paraxial theory of relativistic self-focusing of a Gaussian laser beam in plasma for a time-harmonic plane wave at arbitrary beam intensity. Since the relativistic mechanism is instantaneous, the theory is also applicable to self-focusing of laser pulses. The analysis leads to two values for the critical beam power for self-focusing, Pcr1 and Pcr2. When P < Pcr1 < Pcr2, the beam diverges. When Pcr1 <P <pcr2, it first converges, then diverges, and so on. When P > Pcr2 it first diverges, then converges, and so on.

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18

Baumann, C., and A. Pukhov. "Electron dynamics in twisted light modes of relativistic intensity." Physics of Plasmas 25, no. 8 (2018): 083114. http://dx.doi.org/10.1063/1.5044617.

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19

Xu, Hui, Zheng-Ming Sheng, Jie Zhang, and M. Y. Yu. "Intensity-dependent resonance absorption in relativistic laser-plasma interaction." Physics of Plasmas 13, no. 12 (2006): 123301. http://dx.doi.org/10.1063/1.2397580.

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20

Umstadter, D. P., C. Barty, M. Perry, and G. A. Mourou. "Tabletop, Ultrahigh-Intensity Lasers: Dawn of Nonlinear Relativistic Optics." Optics and Photonics News 9, no. 7 (1998): 40. http://dx.doi.org/10.1364/opn.9.7.000040.

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21

Hartemann, F. V. "High-intensity scattering processes of relativistic electrons in vacuum." Physics of Plasmas 5, no. 5 (1998): 2037–47. http://dx.doi.org/10.1063/1.872875.

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22

Walsh, J., K. Woods, and S. Yeager. "Intensity of Smith-Purcell radiation in the relativistic regime." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 341, no. 1-3 (1994): 277–79. http://dx.doi.org/10.1016/0168-9002(94)90364-6.

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23

Vyas, Ashish, Ram Kishor Singh, and R. P. Sharma. "Study of coexisting stimulated Raman and Brillouin scattering at relativistic laser power." Laser and Particle Beams 32, no. 4 (2014): 657–63. http://dx.doi.org/10.1017/s0263034614000688.

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AbstractThis paper presents a model to study the stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) simultaneously at relativistic laser power. At high intensity, the relativistic mass correction for the plasma electrons becomes significant and the plasma refractive index gets modified which leads to the relativistic self-focusing of the pump beam. This filamentation process affects the scattering processes (SRS and SBS) and at the same time the pump filamentation process also gets modified in the presence of the coexisting SRS and SBS due to the pump depletion. We hav

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24

Chen, J., K. H. Li, and J. H. Wen. "Relativistic high-order harmonics of a hydrogenlike atom in an ultrastrong laser field." Canadian Journal of Physics 77, no. 7 (1999): 521–29. http://dx.doi.org/10.1139/p99-025.

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The relativistic high-order harmonics of a hydrogenlike atom in an ultrastrong laser field has been simulated by the classical Monte-Carlo method in this paper. The results concerning the influence of the laser parameters (frequency, pulse-shape, intensity, etc.) on the relativistic high-order harmonics have been obtained and the conversion efficiency has also been calculated. Some conclusions are drawn and discussed.PACS Nos.: 42.65Ky and 32.80Rm

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25

LONTANO, M., M. BORGHESI, S. V. BULANOV, et al. "Nondrifting relativistic electromagnetic solitons in plasmas." Laser and Particle Beams 21, no. 4 (2003): 541–44. http://dx.doi.org/10.1017/s0263034603214105.

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Low-frequency, relativistic, subcycle solitary waves are found in two-dimensional and three-dimensional particle-in-cell (PIC) numerical simulations, as a result of the interaction of ultrashort, high-intensity laser pulses with plasmas. Moreover, nondrifting, subcycle relativistic electromagnetic solitons have been obtained as solutions of the hydrodynamic equations for an electron–ion warm plasma, by assuming the quasi-neutrality character of the plasma response. In addition, the formation of long-living macroscopic soliton-like structures has been experimentally observed by means of the pro

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26

Asthana, M., K. P. Maheshwari, and M. S. Sodha. "Nonlinear relativistic self-focusing of laser radiation in plasmas: Arbitrary intensity." Laser and Particle Beams 12, no. 4 (1994): 623–32. http://dx.doi.org/10.1017/s0263034600008508.

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A paraxial theory of relativistic self-focusing of a Gaussian laser beam in plasmas, when the nonlinear part of the effective dielectric constant is arbitrarily large, is presented. The plasma is taken to be homogeneous without any density fluctuations being necessary. The approach of Akhmanov et al. based on the WKB and paraxial ray approximations has been followed. It is seen that the saturating nature of nonlinearity leads to two values of critical power of the beam (Pcrl and Pcr2) for self-focusing. When the power of the beam P lies between the two critical values (i.e., Pcr1 < P < P

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27

Struminsky, A. B., I. Yu Grigorieva, Yu I. Logachev, and A. M. Sadovskii. "Solar relativistic electrons and protons on October 28, 2021 (GLE73)." Известия Российской академии наук. Серия физическая 87, no. 7 (2023): 1023–27. http://dx.doi.org/10.31857/s0367676523701818.

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The proton event of October 28, 2021, which was accompanied by the first in the current 25th cycle and the 73rd in the history of observations, a ground-based enhancement in the intensity of cosmic rays (GLE73), is considered. The development of the parent flare lasted more than 10 min against the background of the highest energy release simultaneously creating the conditions both for acceleration of the coronal mass ejection (CME) and acceleration of charged particles to relativistic energies. The similarity of time intensity profiles of relativistic electrons and protons in the Earth’s orbit

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28

Afanasiev, G. N., M. V. Lyubchenko, and Yu P. Stepanovsky. "Fine structure of the Vavilov–Cherenkov radiation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462, no. 2066 (2005): 689–99. http://dx.doi.org/10.1098/rspa.2005.1599.

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We found relativistic quantum corrections to the one-photon Cherenkov emission. It is proved that, in the absence of dispersion, the Vavilov–Cherenkov radiation fills the whole Cherenkov cone (in the Tamm–Frank theory the Vavilov–Cherenkov radiation for the fixed refractive index is confined to the surface of the Cherenkov cone). The radiation intensity reaches the maximum inside the Cherenkov cone. It turns out that photons with different energies fly at different angles in the interval from zero up to the Cherenkov angle corresponding to the initial charge velocity. The visible light region,

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29

Albert, O., H. Wang, D. Liu, Z. Chang, and G. Mourou. "Generation of relativistic intensity pulses at a kilohertz repetition rate." Optics Letters 25, no. 15 (2000): 1125. http://dx.doi.org/10.1364/ol.25.001125.

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30

Golovinski, P. A., M. A. Dolgopolov, and V. G. Khlebostroev. "Hard x-ray generation in laser field of relativistic intensity." Physica Scripta 51, no. 6 (1995): 759–61. http://dx.doi.org/10.1088/0031-8949/51/6/009.

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31

Rezaei, S., M. R. Jafari Milani, and M. J. Jafari. "High intensity laser beam propagation through a relativistic warm magnetoplasma." Physics of Plasmas 24, no. 4 (2017): 043101. http://dx.doi.org/10.1063/1.4979169.

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32

Umstadter, D., S. ‐Y Chen, G. Ma, et al. "Dense and Relativistic Plasmas Produced by Compact High‐Intensity Lasers." Astrophysical Journal Supplement Series 127, no. 2 (2000): 513–18. http://dx.doi.org/10.1086/313340.

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33

Garuchava, D. P., Z. I. Rostomashvili, and N. L. Tsintsadze. "Filamentation instability of relativistic-intensity electromagnetic waves in a plasma." Soviet Journal of Quantum Electronics 16, no. 9 (1986): 1267–68. http://dx.doi.org/10.1070/qe1986v016n09abeh007486.

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34

Har-Shemesh, Omri, and Antonino Di Piazza. "Peak intensity measurement of relativistic lasers via nonlinear Thomson scattering." Optics Letters 37, no. 8 (2012): 1352. http://dx.doi.org/10.1364/ol.37.001352.

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35

Mioduszewski, A. J., P. A. Hughes, and G. C. Duncan. "The Effects of Light Travel Time on the Appearance of Relativistic Jets." International Astronomical Union Colloquium 164 (1998): 139–40. http://dx.doi.org/10.1017/s0252921100044894.

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AbstractWe present simulated maps showing the appearance in total intensity of flows computed using a relativistic hydrodynamic code (Duncan k. Hughes 1994: ApJ, 436, L119). The radiation transfer calculations allow for full treatment of relativistic effects, such as Doppler boosting and time delay. Depending on viewing angle, and the speed of emitting features, the appearance of a jet can be strongly influenced by either effect; in both cases the map differs dramatically from the morphology exhibited by the hydrodynamic quantities.

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36

Purohit, Gunjan, Priyanka Rawat, Pradeep Kothiyal, and Ramesh Kumar Sharma. "Relativistic longitudinal self-compression of ultra-intense Gaussian laser pulses in magnetized plasma." Laser and Particle Beams 38, no. 3 (2020): 188–96. http://dx.doi.org/10.1017/s0263034620000245.

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AbstractThis article presents a preliminary study of the longitudinal self-compression of ultra-intense Gaussian laser pulse in a magnetized plasma, when relativistic nonlinearity is active. This study has been carried out in 1D geometry under a nonlinear Schrodinger equation and higher-order paraxial (nonparaxial) approximation. The nonlinear differential equations for self-compression and self-focusing have been derived and solved by the analytical and numerical methods. The dielectric function and the eikonal have been expanded up to the fourth power of r (radial distance). The effect of in

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37

Yeeram, T. "Enhancements of relativistic electron flux at geostationary orbit during high-intensity, long-duration, continuous AE activity (HILDCAA) from 2015 to 2017." Journal of Physics: Conference Series 2431, no. 1 (2023): 012100. http://dx.doi.org/10.1088/1742-6596/2431/1/012100.

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Abstract This work characterizes the enhancements of relativistic electron flux (MeV) in the geostationary orbit (GEO) in High Intensity, Long Duration, Continuous AE Activity (HILDCAA) occurred during declining phase of solar cycle 24. We employed the relativistic electron (0.8 - 2.0 MeV) flux and low-energy electron (40 - 130 keV) flux measured by GOES-13 and POES satellites, respectively. Typically, the relativistic electron flux increases, while the low-energy electron flux decreases in the long recovery phase of moderate storms. The enhancements of E > 0.8 MeV and > 2.0 MeV occurred

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38

Hajra, Rajkumar, Bruce T. Tsurutani, Quanming Lu, et al. "Ultra-relativistic Electron Acceleration during High-intensity Long-duration Continuous Auroral Electrojet Activity Events." Astrophysical Journal 965, no. 2 (2024): 146. http://dx.doi.org/10.3847/1538-4357/ad2dfe.

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Abstract Magnetospheric relativistic electrons are accelerated during substorms and strong convection events that occur during high-intensity long-duration continuous auroral electrojet activity (HILDCAA) events, associated with solar wind high-speed streams (coming from coronal holes). From an analysis of ∼2–20 MeV electrons at L ∼ 2–7 measured by the Van Allen Probe satellite, it is shown that ∼3.4–4.1 days long HILDCAA events are characterized by ∼7.2 MeV electron acceleration in the L ∼ 4.0–6.0 region, which occurs ∼2.9–3.4 days after the onset of HILDCAA. The dominant acceleration process

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39

Kando, Masaki, Alexander S. Pirozhkov, James K. Koga, Timur Zh Esirkepov, and Sergei V. Bulanov. "Prospects of Relativistic Flying Mirrors for Ultra-High-Field Science." Photonics 9, no. 11 (2022): 862. http://dx.doi.org/10.3390/photonics9110862.

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Recent progress of high-peak-power lasers makes researchers envisage ultra-high-field science; however, the current or near future facilities will not be strong enough to reach the vacuum breakdown intensity, i.e., the Schwinger field. To address this difficulty, a relativistic flying mirror (RFM) technology is proposed to boost the focused intensity by double the Doppler effect of an incoming laser pulse. We review the principle, theoretical, and experimental progress of the RFM, as well as its prospects.

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40

Sen, Sonu, Meenu Asthana Varshney, and Dinesh Varshney. "Relativistic Propagation of Linearly/Circularly Polarized Laser Radiation in Plasmas." ISRN Optics 2013 (September 2, 2013): 1–8. http://dx.doi.org/10.1155/2013/642617.

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Paraxial theory of relativistic self-focusing of Gaussian laser beams in plasmas for arbitrary magnitude of intensity of the beam has been presented in this paper. The nonlinearity in the dielectric constant arises on account of relativistic variation of mass. An appropriate expression for the nonlinear dielectric constant has been used to study laser beam propagation for linearly/circularly polarized wave. The variation of beamwidth parameter with distance of propagation, self-trapping condition, and critical power has been evaluated. The saturating nature of nonlinearity yields two values of

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41

Jiao, J., B. Zhang, J. Yu, et al. "Generating high-yield positrons and relativistic collisionless shocks by 10 PW laser." Laser and Particle Beams 35, no. 2 (2017): 234–40. http://dx.doi.org/10.1017/s0263034617000106.

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AbstractRelativistic collisionless shock charged particle acceleration is considered as a possible origin of high-energy cosmic rays. However, it is hard to explore the nature of relativistic collisionless shock due to its low occurring frequency and remote detecting distance. Recently, there are some works attempt to solve this problem by generating relativistic collisionless shock in laboratory conditions. In laboratory, the scheme of generation of relativistic collisionless shock is that two electron–positron pair plasmas knock each other. However, in laboratory, the appropriate pair plasma

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42

Muhsin Hasan Ali and Noor Mustafa Fadel. "Determination of Relativistic Intensity of X-Ray Diffracted from Aluminum Element." Tikrit Journal of Pure Science 24, no. 4 (2019): 74–76. http://dx.doi.org/10.25130/tjps.v24i4.403.

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In this paper, the relative intensity of X-ray diffracted from Aluminum (Al) was found, and taking into account the influences on the intensity of these rays. There was good agreement between the calculated and measured values, the simple differences between them can be attributed to the fact that all crystals in nature are real and not ideal crystals, on the other hand, the accuracy of atomic positions are must probably effected the calculated results

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43

Bak, Petr, Dmitriy Bolkhovityanov, Andrey Korepanov, et al. "Instrument for Studying Wake Fields Influence to International Linear Collider High Intensity Bunch." Siberian Journal of Physics 4, no. 1 (2009): 30–36. http://dx.doi.org/10.54362/1818-7919-2009-4-1-30-36.

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Instrument for bunch tilt measurements in linear collider is presented. Electron beam probe basic principles are described and method of bunch tilt measurements is discussed. The simulation results of testing beam interaction with tilted relativistic bunch are presented. Main components of the bunch tilt measurement error are determined.

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44

MIRZANEJHAD, SAEED, FARSHAD SOHBATZADEH, and ZAHRA HEIDARI. "Instability of electromagnetic waves with radial polarization in a rotating relativistic electron beam guided by ion channel." Journal of Plasma Physics 78, no. 1 (2011): 25–31. http://dx.doi.org/10.1017/s0022377811000304.

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AbstractDispersion characteristics of electromagnetic waves with radial and azimuthal polarization in a rotating relativistic electron beam guided by an ion channel are investigated. Ion-channel electrostatic field and self-fields of relativistic electron beam were included in the formalism. It is shown that the wave with radial polarization is unstable in two regions due to coupling with fast space charge wave. The behaviors of the instability magnitude and spread are analyzed as a function of equilibrium parameters. The introduced instability can be used for amplification and production of h

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45

Paul, SN. "Nonlinear Instability of Circularly Polarised Waves in a Magnetised Relativistic Plasma." Australian Journal of Physics 43, no. 3 (1990): 311. http://dx.doi.org/10.1071/ph900311.

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An intensity dependent nonlinear dispersion relation of a circularly polarised wave in a magnetised relativistic plasma is derived using a special Lorentz transformation and then the stability criteria of the wave are investigated. From numerical estimations it is observed that electromagnetic waves, having powers much below that for the occurrence of nonlinear phenomena due to self-action effects, are unstable in a magnetised relativistic dense plasma. The effects of a strong magnetic field on the group velocity and cut-off frequency in a dense plasma are also discussed.

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46

UPADHYAY, A., V. K. TRIPATHI, A. K. SHARMA, and H. C. PANT. "Asymmetric self-focusing of a laser pulse in plasma." Journal of Plasma Physics 68, no. 1 (2002): 75–80. http://dx.doi.org/10.1017/s0022377802001794.

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An intense short-pulse laser propagating through a plasma undergoes self-pulse distortion due to the combined effects of nonlinearity-induced self-focusing and dispersion. The nonlinearity arises as a result of relativistic mass variation. The low-intensity front of the pulse converges mildly, while the high-intensity later portions self-focus strongly. However, at the intensity maxima, the self-focusing effect is masked by the saturation effect of the nonlinear refractive index. The group velocity is also a function of intensity; as a result, the front of the pulse becomes sharpened, while th

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Hasan Ali, Muhsin, and Noor Mustafa Fadel. "Determination of Relativistic Intensity of X-Ray Diffracted from Aluminum Element." Tikrit Journal of Pure Science 24, no. 4 (2019): 74. http://dx.doi.org/10.25130/j.v24i4.849.

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In this paper, the relative intensity of X-ray diffracted from Aluminum (Al) was found, and taking into account the influences on the intensity of these rays. There was good agreement between the calculated and measured values, the simple differences between them can be attributed to the fact that all crystals in nature are real and not ideal crystals, on the other hand, the accuracy of atomic positions are must probably effected the calculated results  http://dx.doi.org/10.25130/tjps.24.2019.076

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Hrour, E., S. Taj, A. Chahboune, and B. Manaut. "Relativistic proton-impact excitation of hydrogen atom in the presence of intense laser field." Canadian Journal of Physics 94, no. 7 (2016): 645–50. http://dx.doi.org/10.1139/cjp-2016-0074.

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A theoretical treatment, using the first Born approximation, is presented to analyse the results of relativistic laser-assisted proton – hydrogen atom scattering. Specific calculations are carried out for excitation of hydrogen atoms from 1s1/2 to 2s1/2 states by proton impact. We work in an approximation in which the incoming proton may be described by Dirac–Volkov states in the presence of a laser field. Semi-relativistic Darwin wave functions are used to describe the hydrogen atom in its initial and final states, while relativistic, spin, and laser interaction effects are also accounted for

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Domanski, Jaroslaw, and Jan Badziak. "Numerical studies of acceleration of thorium ions by a laser pulse of ultra-relativistic intensity." EPJ Web of Conferences 167 (2018): 01004. http://dx.doi.org/10.1051/epjconf/201816701004.

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One of the key scientific projects of ELI-Nuclear Physics is to study the production of extremely neutron-rich nuclides by a new reaction mechanism called fission-fusion using laser-accelerated thorium (232Th) ions. This research is of crucial importance for understanding the nature of the creation of heavy elements in the Universe; however, they require Th ion beams of very high beam fluencies and intensities which are inaccessible in conventional accelerators. This contribution is a first attempt to investigate the possibility of the generation of intense Th ion beams by a fs laser pulse of

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Hartemann, F. V., J. R. Van Meter, A. L. Troha, et al. "Three-dimensional relativistic electron scattering in an ultrahigh-intensity laser focus." Physical Review E 58, no. 4 (1998): 5001–12. http://dx.doi.org/10.1103/physreve.58.5001.

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