Open AccessInvestigations on radiative opacity measurement by the method of direct laser-heating and self-backlighting
Author(s) -
Jiyan Zhang,
Jiamin Yang,
Yang Gao,
Ding Yao-Nan,
Jun Li,
Yan Jun,
Zhijian Wu,
Yongkun Ding,
Baohan Zhang,
Zheng Zhi-Jian
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.195201
Subject(s) - backlight , opacity , plasma , laser , materials science , radiative transfer , optics , absorption (acoustics) , hohlraum , spectral line , sample (material) , absorption spectroscopy , physics , optoelectronics , liquid crystal display , quantum mechanics , astronomy , thermodynamics
A target designed for opacity studies of dense plasmas by laser direct heating and self-backlighting technique was presented and tested. The backlight source and sample plasma were generated by directing a frequency-tripled Nb-glass laser onto an Au/CH/Al/CH multilayer target on the XG-II laser facility, and the absorption of the sample plasma was obtained by measuring the attenuated backlight spectrum of the sample plasma. One-dimensional radiative hydrodynamic code Multi-1D was used to simulate the laser heating of the multilayer target, and the temperature and density profiles in the target were given. Experimental data were compared with the theoretically calculated spectra using the detailed-term-accounting model, which showed a temperature range from 20 eV to 70 eV in the sample plasma, a result in quite good agreement with the Multi-1D simulations.