1. Enhancement of the conversion efficiency of soft x-ray by colliding gold plasmas
- Author
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P. F. Zheng, M. Zi, Y. Y. Ma, S. Kawata, X. H. Yang, Wenpeng Wang, Guo-Bo Zhang, Y. Yuan, Y. Z. Ke, Y. Cui, F. Y. Wu, B. H. Xu, and S. J. Chen
- Subjects
Physics ,Opacity ,Physics::Instrumentation and Detectors ,Astrophysics::High Energy Astrophysical Phenomena ,Energy conversion efficiency ,Plasma ,Radiation ,Condensed Matter Physics ,Laser ,Instability ,law.invention ,Physics::Plasma Physics ,law ,Atomic physics ,Inertial confinement fusion ,FOIL method - Abstract
A new scheme is proposed to enhance the conversion efficiency (CE) of soft x-rays (0.1–1.5 keV) generated by irradiating a double-gold-foil target using double laser pulses to collide gold plasmas. A detailed analysis of the hydrodynamic evolution of the colliding plasmas is performed by using one-dimensional radiation hydrodynamic simulations. The results show that the total soft x-ray CE can be enhanced up to 71.5% by setting the foil thickness as d1 = 0.3 μm, and this is 14.5% higher than that for a single laser irradiating a single-gold-foil target. Most of the enhanced soft x-ray CEs are generated from a stagnation layer formed by plasma collisions. Such a scheme is simple and practical, which is beneficial for their applications in astrophysical opacity calculations, inertial confinement fusion, and hydrodynamic instability analyses.
- Published
- 2021