Investigation of M-band and L-band Gold Spectra in Hot Halfraums at OMEGA and in EBIT plasmas
Abstract
The determination of the charge state distribution (CSD) of highly ionized gold in high-density plasmas ( ∼ 10^21 cm-3) is critical for ICF experiments. Predictive calculations of the CSD have produced widely varying results. Previous experiments on NOVA have had some success in guiding the models at 2 keV. Here, CSD's have been investigated in Hot Halfraum experiments (Te ∼ 5 keV) at OMEGA by comparing the n=5arrow3 and n=4arrow3 in Ni-like to Kr-like Au and the 3darrow2p transitions in Co to P-like Au to HULLAC line emission modeling. Improvements in these measurements were possible due to a new spectrometer, the MSPEC, which can accommodate a variety of crystal mounts (e.g. elliptical and convex) and has a better spectral range and resolution than previous instruments. The OMEGA measurements will be compared with gold line emission of Kr-like to Ti-like Au and CSD measurements from the low density ( ∼ 10^12 cm-3) plasmas created at the Livermore electron beam ion trap (EBIT) facility. This work was performed by the University of California LLNL under the auspices of the DOE under contract W-7405-ENG-48.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- November 2004
- Bibcode:
- 2004APS..DPPJP1080M