Second Preliminary Report on X-ray Yields from OMEGA II Targets

Fournier, K B ; May, M J ; MacLaren, S A ; Coverdale, C A ; Davis, J F

Lawrence Livermore National Laboratory

关键词: 70 Plasma Physics And Fusion Technology;    Wave Forms;    74 Atomic And Molecular Physics;    Targets;    Lawrence Livermore National Laboratory;   

DOI  :  10.2172/900115
RP-ID  :  UCRL-TR-224095
RP-ID  :  W-7405-ENG-48
RP-ID  :  900115

美国|英语

来源: UNT Digital Library

【 摘 要 】

We present details about X-ray yields measured with LLNL and SNL diagnostics in soft and moderately hard X-ray bands from laser-driven, doped-aerogel targets shot on 07/14/06 during the OMEGA II test series. Yields accurate to {+-}25% in the 5-15 keV band are measured with Livermore's HENWAY spectrometer. Yields in the sub-keV to 3.2 keV band are measured with LLNL's DANTE diagnostic, the DANTE yields may be 35-40% too large. SNL ran a PCD-based diagnostic that also measured X-ray yields in the spectral region above 4 keV, and also down to the nearly sub-keV range. The PCD and HENWAY and DANTE numbers are compared. The time histories of the X-ray signals are measured with LLNL's H11 PCD, and from two SNL PCDs with comparable filtering. There is a persistent disagreement between the H11 PCD and SNL PCD measured FWHM, which is shown not to be due to analysis techniques. The recommended X-ray waveform is that from the SNL PCD p66k10, which was recorded on a fast, high-bandwidth TDS 6804 oscilloscope, and which are not plotted here.