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Development of 2D GEM-based SXR plasma imaging for DTT device: focus on readout structure

Chernyshova, Maryna, Malinowski, Karol, Jabłońskia, Sławomir, Casiraghi, Irene, Demchenko, Iraida N. and Melikhov, Yevgen 2021. Development of 2D GEM-based SXR plasma imaging for DTT device: focus on readout structure. Fusion Engineering and Design 169 , 112443. 10.1016/j.fusengdes.2021.112443

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Creation and development of a new diagnostics useful for future thermonuclear reactors and helpful in studying impurity profiles, MHD modes/localization, and imaging are among urgent tasks in plasma research field. Global SXR imaging for DTT device in support of power exhaust programme and its consecutive impact for plasma core is an example of applicability of such diagnostics. This contribution presents the results of the ongoing development of the elaborated plasma X-ray imaging technology focusing on the design of the relevant structure of readout electrode. In order to achieve that, the details on the expected plasma radiation for the selected scenario for DTT machine were assessed. Then, the spatial distribution of plasma radiation intensity flux that will be reaching the detector window of the GEM based detector was simulated. Taking it into account along with the physical properties of the detector, the spatial and temporal distributions of charge cloud that will be reaching the readout plane were evaluated. The special design of the readout structure has been proposed that fulfil critical conditions originated from technological and physical constraints. The final effectiveness of the GEM based detector was evaluated proving that such detector is well suited for an effective plasma radiation imaging.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Elsevier
ISSN: 0920-3796
Date of First Compliant Deposit: 23 March 2021
Date of Acceptance: 1 March 2021
Last Modified: 17 May 2022 17:44

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