Conceptual study of energy resolved x-ray measurement and electron temperature reconstruction on ITER with low voltage ionization chambers

Colette, D. and Mazon, D. and Barnsley, R. and O'Mullane, M. and Jardin, A. and Sirinelli, A. (2021) Conceptual study of energy resolved x-ray measurement and electron temperature reconstruction on ITER with low voltage ionization chambers. Review of Scientific Instruments, 92 (8). 083511. ISSN 0034-6748 (https://doi.org/10.1063/5.0028460)

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Abstract

In tokamaks with tungsten-based plasma facing components, such as ITER, pollution of the plasma by heavy impurities is a major concern as it can lead to radiative breakdown. The radiation emitted by such impurities is mainly composed of x-rays in the [0.1; 100] keV range. A diagnostic allowing for the reconstruction of the impurity distribution is of high interest. The ITER requirements for the x-ray measurement system make it mandatory for the detector to provide spectral information. Due to the radiation environment during the ITER nuclear phase, advanced detectors exhibiting high resilience to neutrons and gamma rays, such as gas-filled detectors, are required. The use of Low Voltage Ionization Chambers (LVICs) for this purpose is investigated in this paper. Several anodes have been added to the detector in order to allow for spectral deconvolution. This article presents a conceptual study of the use of a multi-anode LVIC for energy resolved x-ray measurement on ITER. It covers the design of the multi-anode LVIC and its modeling, the method for spectral deconvolution, and its application to energy resolved x-ray tomography, as well as the computation of the electron temperature from the reconstructed local x-ray emissivity.

ORCID iDs

Colette, D., Mazon, D., Barnsley, R., O'Mullane, M. ORCID logoORCID: https://orcid.org/0000-0002-2160-4546, Jardin, A. and Sirinelli, A.;
  • Item type:Article
    ID code:77930
    Dates:
    Date
    Event
    31 August 2021
    Published
    10 August 2021
    Published Online
    14 June 2021
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:29 Sep 2021 09:42
    Last modified:11 Nov 2024 13:14
    URI:https://strathprints.strath.ac.uk/id/eprint/77930
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