Absolute throughput calibration of multiple spherical crystals for the Orion High-REsolution X-ray spectrometer (OHREX)

MacDonald, M. J.; Widmann, K.; Beiersdorfer, P.; Hell, N.; Hoarty, D. J.; Magee, E. W.; Shah, C.; Shepherd, R.; Brown, G. V.

doi:10.1063/5.0043683

Absolute throughput calibration of multiple spherical crystals for the Orion High-REsolution X-ray spectrometer (OHREX)

Journal Article · Sun Jan 31 23:00:00 EST 2021 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0043683· OSTI ID:1769129

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Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Directorate of Research and Applied Science (United Kingdom)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); NASA Goddard Inst. for Space Studies (GISS), New York, NY (United States); Max Planck Inst. fuer Kernphysik, Heidelberg (Germany)

We present absolute throughput analysis of several crystals for the Orion High-REsolution X-ray (OHREX) imaging crystal spectrometer using ray tracing and experimental measurements. The OHREX spectrometer is a high-resolution x-ray spectrometer designed to measure spectral line shapes at the Orion laser facility. The spectrometer is fielded with up to two spherical crystals simultaneously covering two independent spectral ranges. Each crystal has a nominal radius of curvature of R = 67.2 cm and is fielded at a nominal Bragg angle of 51.3°. To cover different bands of interest, several different crystals are available, including Ge (111), KAP, and several cuts of quartz, whose resolving power λ/Δλ exceeds 10 000. The calibrated response of the available crystals has previously been reported from measurements at the EBIT-I electron beam ion trap at Lawrence Livermore National Laboratory. Here, we model the absolute throughput of each crystal using ray tracing and verify the results using experimental data for the quartz $$(10\bar{1}1)$$ crystal.

View Accepted Manuscript (DOE)

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:: 1769129

Alternate ID(s):: OSTI ID: 1765927

Report Number(s):: LLNL-JRNL--818089; 1028409

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 92; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Absolute throughput calibration of multiple spherical crystals for the Orion High-REsolution X-ray spectrometer (OHREX)

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