Speaker
Description
Gamma-rays generated in nuclear reactions were used in JET for decades to study the main mechanisms of fast-ions slowing down, redistribution and losses for development optimal plasma scenarios with auxiliary plasma heating [1]. The recent JET deuterium-tritium experiments (DTE) verified the feasibility of the confined α-particle diagnosing and monitoring D-T fusion rate. Also, a novel technique for the ion temperature assessments [2] was tested by means of the T-H fusion γ-ray measurement [3].
In this paper, a set of selected nuclear reactions is presented to diagnose fast-ions (H, D, T, 3He and α-particles) in pre-burning and burning plasmas using γ-rays. It is shown that γ-ray measurements give an opportunity to characterise performance of both NBI and ICRH heating (H- and 3He-minorities) standing up for scenarios development in the operated and constructing fusion plasma machines, JT-60SA, SPARC, ITER etc. A possibility for γ-ray monitoring of lost α-particles [4] in burning plasmas will be discussed.
1] Kiptily V.G., Cecil F.E. and Medley S.S., 2006 Plasma Phys. Control. Fusion 48 R59
[2] Kiptily V.G. et al 2015 Nucl. Fusion 55 023008
[3] Kiptily V.G. et al 2024 Nucl. Fusion 64 086059
[4] Kiptily V.G. et al 2018 Nucl. Fusion 58 014003
| Presentation type | Oral |
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