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Title: Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser–matter interaction

Journal Article · · Review of Scientific Instruments
DOI: https://doi.org/10.1063/5.0206348 · OSTI ID:2530326
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [5]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [6]; ORCiD logo [6]; ORCiD logo [7]
  1. ELI Beamlines Facility, Dolní Břežany (Czech Republic). Extreme Light Infrastructure ERIC; Czech Technical Univ., Prague (Czech Republic)
  2. Univ. of California, San Diego, CA (United States)
  3. Univ. of California, San Diego, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  4. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  5. General Atomics, San Diego, CA (United States)
  6. ELI Beamlines Facility, Dolní Břežany (Czech Republic). Extreme Light Infrastructure ERIC
  7. ELI Beamlines Facility, Dolní Břežany (Czech Republic). Extreme Light Infrastructure ERIC; Czech Technical Univ., Prague (Czech Republic); General Atomics, San Diego, CA (United States)

With the advent of high repetition rate laser facilities, novel diagnostic tools compatible with these advanced specifications are required. This paper presents the design of an active gamma-ray spectrometer intended for these high repetition rate experiments, with particular emphasis on functionality within a PW level laser-plasma interaction chamber’s extreme conditions. The spectrometer uses stacked scintillators to accommodate a broad range of gamma-ray energies, demonstrating its adaptability for various experimental setups. In addition, it has been engineered to maintain compactness, electromagnetic pulse resistance, and ISO-5 cleanliness requirements while ensuring high sensitivity. The spectrometer has been tested in real conditions inside the PW-class level interaction chamber at the BELLA center, LBNL. The paper further details the calibration process, which utilizes a 60Co radioactive source, and describes the unfolding technique implemented through a stochastic minimization method.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231; SC0014664
OSTI ID:
2530326
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 96; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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