Lineshape spectroscopy with a very high resolution, very high signal-to-noise crystal spectrometer
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. Erlangen-Nurnberg, Bamberg (Germany)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- AWE plc, Reading (United Kingdom)
Here, we have developed a high-resolution x-ray spectrometer for measuring the shapes of spectral lines produced from laser-irradiated targets on the Orion laser facility. The instrument utilizes a spherically bent crystal geometry to spatially focus and spectrally analyze photons from foil or microdot targets. The high photon collection efficiency resulting from its imaging properties allows the instrument to be mounted outside the Orion chamber, where it is far less sensitive to particles, hard x-rays, or electromagnetic pulses than instruments housed close to the target chamber center in ten-inch manipulators. Moreover, Bragg angles above 50° are possible, which provide greatly improved spectral resolution compared to radially viewing, near grazing-incidence crystal spectrometers. These properties make the new instrument an ideal lineshape diagnostic for determining plasma temperature and density. We describe its calibration on the Livermore electron beam ion trap facility and present spectral data of the K-shell emission from highly charged sulfur produced by long-pulse as well as short-pulse beams on the Orion laser in the United Kingdom.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1411695
- Alternate ID(s):
- OSTI ID: 1255626
- Report Number(s):
- LLNL-JRNL-684087
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 6; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Lineshape measurements of He- β spectra on the ORION laser facility
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journal | October 2016 |
Laser-driven strong magnetostatic fields with applications to charged beam transport and magnetized high energy-density physics
|
journal | May 2018 |
High resolution, high signal-to-noise crystal spectrometer for measurements of line shifts in high-density plasmas
|
journal | October 2018 |
Experimental comparison of spherically bent HAPG and Ge crystals
|
journal | October 2018 |
Observation of He-like Satellite Lines of the H-like Potassium K xix Emission
|
journal | August 2019 |
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