Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 92, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0043833
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Funding
- U.S. DOE, Office of Fusion Energy Sciences [FWP SW1626 FES]
- U.S. DOE by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- DOE [DE-SC-0016249, DE-NA-0003856, DE-AC02-09CH11466]
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This study presents measurements of spatially and temporally resolved electron temperature in high-energy-density plasmas using gated x-ray pinhole imagers. By comparing the attenuated signal through different filter materials, a spatially resolved electron temperature as low as 0.1 keV can be estimated. Furthermore, imaging from different directions has a negligible effect on temperature estimates.
We present measurements of spatially and temporally resolved electron temperature in high-energy-density plasmas using gated x-ray pinhole imagers. A 2D image of bremsstrahlung x-ray self-emission from laser-driven plasma plumes is detected at the same time through two pinholes covered with different filter materials. By comparing the attenuated signal through each filter, a spatially resolved electron temperature as low as 0.1 keV can be estimated. Measurements of the plasma plume taken from different directions indicate that imaging through extended plasmas has a negligible effect on the temperature estimates. Methods for estimating the expected signal, selecting filters, and incorporating the response of the detector are discussed.
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