Investigation of picosecond thermodynamics in a laser-produced plasma using Thomson scattering

被引：6
|
作者：
Davies, A. S. [1 ,2 ]
Haberberger, D. [1 ]
Katz, J. [1 ]
Bucht, S. [1 ,2 ]
Palastro, J. P. [1 ]
Follett, R. K. [1 ]
Froula, D. H. [1 ,2 ]
机构：
[1] Univ Rochester, Lab Laser Energet, 250 East River Rd, Rochester, NY 14623 USA
[2] Univ Rochester, Dept Phys & Astron, Rochester, NY 14623 USA
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2020年 / 62卷 / 01期
关键词：
plasma thermodynamics; laser-plasma interactions; time-resolved light scattering; spectroscopy; optical plasma measurements; ultrafast optics; laser light absorption in plasmas; PULSE; COMPRESSION; THRESHOLD;
D O I：
10.1088/1361-6587/ab49db
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The picosecond evolution of the plasma conditions in a laser-produced plasma was measured using a Thomson-scattering diagnostic. The picosecond resolved Thomson spectra was enabled by a pulse-front-tilt-compensated spectrometer. The Thomson spectra revealed a transition in the plasma conditions from an initially cold evolving plasma to a quasi-stationary equilibrium plasma. The equilibrium temperature was found to match the generalized heat equation's predicted scaling T-e proportional to n(e)(2/5) and T-e proportional to I-1/5. The plasma evolution was compared to Raman gain bandwidth calculations and showed a time-dependent resonance detuning that would limit the transfer efficiency of a Raman plasma amplifier in the linear regime.
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页数：8
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