Hard X-Ray collimation system at the T-15MD tokamak

V. I. Tepikin; Тепикин В. И.; P. V. Savrukhin; Саврухин П. В.; E. A. Shestakov; Шестаков Е. А.; P. D. Lisovoi; Лисовой П. Д.; A. V. Khramenkov; Храменков А. В.; A. I. Aristov; Аристов А. И.

doi:10.31857/S0367292124100013

Hard X-Ray collimation system at the T-15MD tokamak

Authors: Tepikin V.I.¹^,2, Savrukhin P.V.¹^,2, Shestakov E.A.¹, Lisovoi P.D.¹^,2, Khramenkov A.V.¹, Aristov A.I.²
Affiliations:
1. National Research Centre “Kurchatov Institute”
2. National Research University “Moscow Power Engineering Institute”
Issue: Vol 50, No 10 (2024)
Pages: 1145-1155
Section: TOKAMAKS
URL: https://ogarev-online.ru/0367-2921/article/view/284502
DOI: https://doi.org/10.31857/S0367292124100013
EDN: https://elibrary.ru/FCYWBZ
ID: 284502

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Abstract

The Hard X-Ray collimation system was installed at the T-15MD tokamak (major radius of R = 1.48 m, minor radius of a = 0.67 m, elongation of k = 1.7–1.9, triangularity of δ = 0.3–0.4, toroidal magnetic field of B_T = 2 T, plasma current of up to Ip = 2 MA, and discharge duration of up to 30 s) to provide the possibility of measuring the spatial and temporal evolution of runaway electron beams. The diagnostic is based on LaBr₃(Ce) scintillation detectors, witch provides energy spectrum measurements for energies form 0.3 to 10 MeV. Monte Carlo simulation of the shielding efficiency in the GEANT4 environment showed that the collimator provides 2° field of view (FOV). Horizontal and vertical FOV movement along the plasma cross-section is arranged by a rotating base and screw support elements. An algorithm for processing the signals from the scintillation detectors with a graphical user interface and data visualization is used for reconstruction of the spectra. The results of testing the detector in a laboratory setup and in preliminary experiments carried out with the T-15MD tokamak in which runaway electrons beams were generated are presented.

Keywords

hard X-ray radiation, accelerated electrons, collimator, scintillation detector, tokamak

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Hard X-Ray collimation system at the T-15MD tokamak

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Abstract

Keywords

About the authors

References

Supplementary files