Advanced simulation of ITER core X-ray crystal spectroscopy

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Jin, Xinyi and Cheng, Zhifeng and Zhang, Junli and Yan, Wei and Chen, Zhongyong and Pablant, Novimir and Gao, Lan and Lu, Dian and O’Mullane, Martin and Tieulent, Raphael and Barnsley, Robin (2025) Advanced simulation of ITER core X-ray crystal spectroscopy. Review of Scientific Instruments, 96 (5). 053503. ISSN 1089-7623 (https://doi.org/10.1063/5.0253335)

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Abstract

X-Ray Simulation Analysis (XRSA) is an analytical ray-tracing mixed code developed specifically for the ITER Core X-Ray Crystal Spectroscopy (XRCS-Core) diagnostic, which employs a dual-reflection configuration incorporating multiple pre-reflectors made of Highly Oriented Pyrolytic Graphite (HOPG) and spherically curved analyzing crystals. The ITER XRCS-Core is designed for high spectral resolution measurement in specific wavelength ranges, including narrow bands around 1.354 Å for W64+, 2.19 Å for Xe51+, and 2.555 Å for Xe44+ and Xe47+, enabling diagnostic capability across a broad electron temperature range in the ITER plasma. XRSA facilitates efficient simulation of the spectral performance of this complex X-ray spectroscopic system. Recent updates to the XRSA code have incorporated two critical effects: auto-focusing, which specifically applies to HOPG, and polarization. These two effects are particularly important in the dual-reflection configuration used in the ITER XRCS-Core system to provide more accurate modeling results. Simulations conducted with the updated code demonstrate that polarization has a substantial impact on the performance of the dual-reflection system. Additionally, the combined influence of polarization and system layout introduces performance variations across channels through the same crystal.

ORCID iDs

Jin, Xinyi, Cheng, Zhifeng, Zhang, Junli, Yan, Wei, Chen, Zhongyong, Pablant, Novimir, Gao, Lan, Lu, Dian, O’Mullane, Martin ORCID logoORCID: https://orcid.org/0000-0002-2160-4546, Tieulent, Raphael and Barnsley, Robin;
  • Item type:Article
    ID code:92981
    Dates:
    Date
    Event
    8 May 2025
    Published
    21 April 2025
    Accepted
    16 December 2024
    Submitted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:30 May 2025 13:12
    Last modified:12 Aug 2026 06:34
    URI:https://strathprints.strath.ac.uk/id/eprint/92981
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