Time-resolved deuterium–deuterium fusion born 1 MeV triton confinement study in EAST deuterium plasma

Abstract A time-resolved deuterium–deuterium (D–D) fusion-born triton confinement study, aimed at understanding alpha particle confinement ability, was performed in Experimental Advanced Superconducting Tokamak (EAST) deuterium plasmas for the first time. A scintillating fiber detector was developed for measuring the secondary deuterium–tritium (D–T) neutrons, which provide evidence of triton slowdown, in EAST. The D–D fusion-born triton confinement experiment was performed by measuring secondary D–T neutrons in D-beam-heated D plasma with a plasma current of 400 kA. The secondary D–T neutron signal and its time evolution were obtained using pulse height discrimination analysis. The D–T neutron rate was calculated using the classical energetic ion confinement model to clarify the D–T neutron measurements. The secondary D–T neutron emission rate obtained from the numerical simulation closely agrees with the experimentally obtained results when considering the prompt loss of the tritons.

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Publication Details

Journal
Plasma Physics and Controlled Fusion
Published
2024-12-20
DOI
https://doi.org/10.1088/1361-6587/ada1f7
Primary Topic
Magnetic confinement fusion research
Type
article
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Time-resolved deuterium–deuterium fusion born 1 MeV triton confinement study in EAST deuterium plasma

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Time-resolved deuterium–deuterium fusion born 1 MeV triton confinement study in EAST deuterium plasma

Ruijie Zhou, M. Isobe, Weikun Chen, Siriyaporn Sangaroon, Kunihiro Ogawa, Eiji Takada, Liqun Hu, Longyong Liao, Kai Li, Guoqiang Zhong
article en

Abstract

Abstract A time-resolved deuterium–deuterium (D–D) fusion-born triton confinement study, aimed at understanding alpha particle confinement ability, was performed in Experimental Advanced Superconducting Tokamak (EAST) deuterium plasmas for the first time. A scintillating fiber detector was developed for measuring the secondary deuterium–tritium (D–T) neutrons, which provide evidence of triton slowdown, in EAST. The D–D fusion-born triton confinement experiment was performed by measuring secondary D–T neutrons in D-beam-heated D plasma with a plasma current of 400 kA. The secondary D–T neutron signal and its time evolution were obtained using pulse height discrimination analysis. The D–T neutron rate was calculated using the classical energetic ion confinement model to clarify the D–T neutron measurements. The secondary D–T neutron emission rate obtained from the numerical simulation closely agrees with the experimentally obtained results when considering the prompt loss of the tritons.

Plasma Physics and Controlled FusionVol. 67(2)
Hitotsubashi University (JP), Mahasarakham University (TH), University of Science and Technology of China (CN), Chinese Academy of Sciences (CN), National Institutes of Natural Sciences (JP), The Graduate University for Advanced Studies, SOKENDAI (JP), Hefei Institutes of Physical Science (CN), National Institute for Fusion Science (JP), Institute of Plasma Physics (CN), West Anhui University (CN)
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