Alpha particle loss measurements and analysis in JET DT plasmas

IF 3.5 1区 物理与天体物理 Q1 PHYSICS, FLUIDS & PLASMAS Nuclear Fusion Pub Date : 2024-08-11 DOI:10.1088/1741-4326/ad69a1
P.J. Bonofiglo, V.G. Kiptily, J. Rivero-Rodriguez, M. Nocente, M. Podestà, Ž. Štancar, M. Poradzinski, V. Goloborodko, S.E. Sharapov, M. Fitzgerald, R. Dumont, J. Garcia, D. Keeling, D. Frigione, L. Garzotti, F.G. Rimini, D. Van Eester, E. Lerche, M. Maslov and JET Contributors
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Abstract

Burning reactor plasmas will be self-heated by fusion born alpha particles from deuterium-tritium reactions. Consequently, a thorough understanding of the confinement and transport of DT-born alpha particles is necessary to maintain the plasma self-heating. Measurements of fast ion losses provide a direct means to monitor alpha particle confinement. JET’s 2021–2022 second experimental DT-campaign offers burning plasma scenarios with advanced fast ion loss diagnostics for the first time in nearly 25 years. Coherent and non-coherent alpha losses were observed due to a variety of low frequency MHD activity. This manuscript will present the loss mechanisms, spatial and pitch dependencies, scalings with plasma parameters, correlations with wall impurities, and magnitude of DT-alpha born losses.
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JET DT 等离子体中的α粒子损耗测量与分析
燃烧反应堆等离子体会被氘氚反应产生的核聚变α粒子自加热。因此,要维持等离子体的自加热,就必须全面了解氘氚反应产生的阿尔法粒子的封闭和传输情况。对快速离子损耗的测量为监测阿尔法粒子的封闭提供了直接手段。JET 的 2021-2022 年第二次 DT 实验活动在近 25 年来首次提供了具有先进快速离子损耗诊断功能的燃烧等离子体场景。由于各种低频 MHD 活动,观测到了相干和非相干阿尔法损耗。本手稿将介绍损耗机制、空间和间距依赖性、与等离子体参数的比例关系、与壁杂质的相关性以及 DT α损耗的大小。
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来源期刊
Nuclear Fusion
Nuclear Fusion 物理-物理:核物理
CiteScore
6.30
自引率
39.40%
发文量
411
审稿时长
2.6 months
期刊介绍: Nuclear Fusion publishes articles making significant advances to the field of controlled thermonuclear fusion. The journal scope includes: -the production, heating and confinement of high temperature plasmas; -the physical properties of such plasmas; -the experimental or theoretical methods of exploring or explaining them; -fusion reactor physics; -reactor concepts; and -fusion technologies. The journal has a dedicated Associate Editor for inertial confinement fusion.
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