scholarly journals Measurements of laser-imprint-induced shock velocity nonuniformities in plastic targets with the Nike KrF laser

2021 ◽  
Vol 28 (3) ◽  
pp. 032704
Author(s):  
Jaechul Oh ◽  
Andrew J. Schmitt ◽  
Max Karasik ◽  
Stephen P. Obenschain
Keyword(s):  
Shock Velocity ◽  
Krf Laser

PHASE CONJUGATION OF KrF LASER RADIATION

1983 ◽  
Vol 44 (C2) ◽  
pp. C2-19-C2-25
Author(s):  
M. C. Gower ◽  
R. G. Caro
Keyword(s):  
Laser Radiation ◽  
Phase Conjugation ◽  
Krf Laser

Measurements of KrF laser-induced O2 fluorescence in high-temperature atmospheric air

1993 ◽  
Author(s):  
JAY GRINSTEAD ◽  
GABRIEL LAUFER ◽  
JAMES MCDANIEL, JR.
Keyword(s):  
High Temperature ◽  
Atmospheric Air ◽  
Krf Laser

Reflection of KrF laser radiation from silicon surfaces with various coatings

1993 ◽  
Vol 14 (6) ◽  
pp. 421-425 ◽  
Author(s):  
V. S. Barabanov ◽  
V. L. Kantsyrev ◽  
N. V. Morozov ◽  
P. B. Sergeev ◽  
M. A. Tyunina
Keyword(s):  
Laser Radiation ◽  
Silicon Surfaces ◽  
Krf Laser

scholarly journals Monte Carlo simulations of fast Newtonian and mildly relativistic shock breakout from a stellar wind

2020 ◽  
Vol 499 (4) ◽  
pp. 4961-4971
Author(s):  
Hirotaka Ito ◽  
Amir Levinson ◽  
Ehud Nakar
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Stellar Wind ◽  
Compact Star ◽  
Strong Dependence ◽  
Shock Velocity ◽  
Light Curves ◽  
Ultraviolet Emission ◽  
Relativistic Shocks ◽  
Strong Explosion

ABSTRACT Strong explosion of a compact star surrounded by a thick stellar wind drives a fast (>0.1c) radiation mediated shock (RMS) that propagates in the wind, and ultimately breaks out gradually once photons start escaping from the shock transition layer. In exceptionally strong or aspherical explosions, the shock velocity may even be relativistic. The properties of the breakout signal depend on the dynamics and structure of the shock during the breakout phase. Here we present, for the first time, spectra and light curves of the breakout emission of fast Newtonian and mildly relativistic shocks, that were calculated using self-consistent Monte Carlo simulations of finite RMS with radiative losses. We find a strong dependence of the νFν peak on shock velocity, ranging from ∼1 keV for vs/c = 0.1 to ∼100 keV for vs/c = 0.5, with a shift to lower energies as losses increase. For all cases studied the spectrum below the peak exhibits a nearly flat component (Fν ∼ ν0) that extends down to the break frequency below which absorption becomes important. This implies much bright optical/ultraviolet emission than hitherto expected. The computed light curves show a gradual rise over tens to hundreds of seconds for representative conditions. The application to SN 2008D/XRT 080109 and the detectability limits are also discussed. We predict a detection rate of about one per year with eROSITA.

Influence of Discharge Plasma Inhomogeneities on the Characteristics of KrF-Laser Radiation

2021 ◽  
Vol 63 (12) ◽  
pp. 2070-2075
Author(s):  
Hongda Li ◽  
Y. N. Panchenko ◽  
M. V. Andreev ◽  
A. V. Puchikin ◽  
S. A. Yampolskaya ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Discharge Plasma ◽  
Krf Laser

scholarly journals Monochromatic Conical IR Emission from Decaying KrF Laser Filaments in Xenon as Coherent Stimulated Four-Wave Mixing Process

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 47
Author(s):  
Igor V. Smetanin ◽  
Alexey V. Shutov ◽  
Nikolay N. Ustinovskii ◽  
Vladimir D. Zvorykin ◽  
Anna V. Bogatskaya ◽  
...  
Keyword(s):  
Transverse Relaxation Time ◽  
Four Wave Mixing ◽  
Theoretical Background ◽  
Wave Mixing ◽  
Mixing Process ◽  
Optical Phenomenon ◽  
Coherent Interaction ◽  
Conical Emission ◽  
Krf Laser ◽  
Ir Emission

We develop theoretical background for the new nonlinear optical phenomenon of narrowly directed monochromatic IR conical emission which has been recently observed when 248-nm UV filaments propagate in xenon (V. D. Zvorykin, et al., Laser Phys. Lett. 13, 125404 (2016)). We treat it as coherent stimulated four-wave mixing process in which two pump KrF laser photons are converted into the coupled pair of resonance IR(828 nm) and VUV (147 nm) photons through 5p5(2P3/2)6p[1/2]0→5p5(2P3/2)6s[3/2]1o and 5p5(2P3/2)6s[3/2]1o→1S0 transitions. We explore the coherent interaction regime which proceeds at a time scale shorter than transverse relaxation time T2. The momentum and energy conservation laws determine the characteristic angle of conical emission. We find that the threshold of this coherent process is determined by the KrF laser pump pulse area.

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