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Title: Lineshape spectroscopy with a very high resolution, very high signal-to-noise crystal spectrometer

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4952748· OSTI ID:1411695
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [4];  [4];  [4];  [4];  [4];  [4]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. Erlangen-Nurnberg, Bamberg (Germany)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. 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
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (5)

Lineshape measurements of He- β spectra on the ORION laser facility 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