Characterization of an imploding cylindrical plasma for electron transport studies using x-ray emission spectroscopy
- Univ. of California, San Diego, CA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- General Atomics, San Diego, CA (United States)
- Univ. of Rochester, NY (United States)
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Osaka Univ., Suita (Japan)
- Univ. of Bordeaux, Talence (France). CNRS-CEA
We report on the characterization of the conditions of an imploding cylindrical plasma by time-resolved x-ray emission spectroscopy. Knowledge about this implosion platform can be applied to studies of particle transport for inertial confinement fusion schemes or to astrophysical plasmas. A cylindrical Cl-doped CH foam within a tube of solid CH was irradiated by 36 beams (Itotal ~5 x 1014 W/cm2, 1.5 ns square pulse, and Etotal ~ 16.2 kJ) of the OMEGA-60 laser to radially compress the CH toward the axis. The analysis of the time-resolved spectra showed that the compression can be described by four distinct phases, each presenting different plasma conditions. First the ablation of the cylinder is dominant; second, the foam is heated and induces a significant jump in emission intensities; third, the temperature and density of the foam reaches a maximum; and finally, the plasma expands. Ranges for the plasma temperature were inferred with the atomic physics code SCRAM (Spectroscopic Collisional-Radiative Atomic Model) and the experimental data have been compared to hydrodynamic simulations performed with the 2D code FLASH, which showed a similar implosion dynamic over time.
- Research Organization:
- Univ. of California, San Diego, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0003943; FOA-0001568; NA0003525; AC04-94AL85000; NA0003842
- OSTI ID:
- 1633763
- Alternate ID(s):
- OSTI ID: 1597140; OSTI ID: 1810375
- Report Number(s):
- SAND-2021-7751J; TRN: US2201235
- Journal Information:
- Physics of Plasmas, Vol. 27, Issue 2; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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