Optimized x-ray emission from 10 ns long germanium x-ray sources at the National Ignition Facility
Journal Article
·
· Review of Scientific Instruments
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- General Atomics, San Diego, CA (United States)
This study investigates methods to optimize quasi-monochromatic, ~10 ns long x-ray sources (XRS) for time-resolved x-ray diffraction measurements of phase transitions during dynamic laser compression measurements at the National Ignition Facility (NIF). To support this, we produce continuous and pulsed XRS by irradiating a Ge foil with NIF lasers to achieve an intensity of 2 × 1015 W/cm2, optimizing the laser-to-x-ray conversion efficiency. Our x-ray source is dominated by Ge He-α line emission. Here, we discuss methods to optimize the source to maintain a uniform XRS for ~10 ns, mitigating cold plasma and higher energy x-ray emission lines.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 2005056
- Alternate ID(s):
- OSTI ID: 1902496
- Report Number(s):
- LLNL-JRNL-836171; 1055289; TRN: US2405929
- Journal Information:
- Review of Scientific Instruments, Vol. 93, Issue 12; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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