Fusion product studies via fast ion D–D and D–3He fusion on JET
Fusion product studies via fast ion D–D and D–3He fusion on JET
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通过快离子 D-D 和 D-3He 在 JET 上聚变进行聚变产物研究
DOI：
10.1088/0029-5515/56/11/112021
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
V. Zoita
中科院分区：
文献类型：
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作者：
S. Sharapov;T. Hellsten;V. Kiptily;T. Craciunescu;J. Eriksson;M. Fitzgerald;J. Girardo;V. Goloborod’ko;C. Hellesen;A. Hjalmarsson;T. Johnson;Y. Kazakov;T. Koskela;M. Mantsinen;I. Monakhov;F. Nabais;M. Nocente;C. Perez von Thun;F. Rimini;M. Santala;M. Schneider;M. Tardocchi;M. Tsalas;V. Yavorskij;V. Zoita
2008年和2014年分别在JET碳壁和ITER类壁实验装置上进行了D-D和D-3 He快离子聚变实验，以测试聚变产物的中子和高能离子诊断。氘-氘中子能谱是纯氘等离子体中研究的热点。观察到D-D快聚变产生的中子的能谱显著展宽，并建立了D-D和D-D中子最大能量与等离子体密度的关系。非中子D-3 He聚变反应带电产物的诊断，3.7 MeV的α粒子类似于D-T聚变，和14.6 MeV的质子，是D-3 He等离子体研究的重点。用D（3 He，γ）5Li反应弱次级分支产生的16.4MeV γ射线测量数据，对D-3 He聚变功率进行了估算。为了在较低的输入加热功率下获得较高的D-D和D-3 He反应产额，采用三次谐波（f=3fCD）ICRH技术将D束加速到MeV能量范围。这些结果进行了比较的D束注入到D-3 He混合物，和3 He少数ICRH在D等离子体中的技术。
Dedicated fast ion D–D and D–3He fusion experiments were performed on JET with carbon wall (2008) and ITER-like wall (2014) for testing the upgraded neutron and energetic ion diagnostics of fusion products. Energy spectrum of D–D neutrons was the focus of the studies in pure deuterium plasmas. A significant broadening of the energy spectrum of neutrons born in D–D fast fusion was observed, and dependence of the maximum D and D–D neutron energies on plasma density was established. Diagnostics of charged products of aneutronic D–3He fusion reactions, 3.7 MeV alpha-particles similar to those in D–T fusion, and 14.6 MeV protons, were the focus of the studies in D–3He plasmas. Measurements of 16.4 MeV gamma-rays born in the weak secondary branch of D(3He, γ)5Li reaction were used for assessing D–3He fusion power. For achieving high yield of D–D and D–3He reactions at relatively low levels of input heating power, an acceleration of D beam up to the MeV energy range was used employing 3rd harmonic (f=3fCD) ICRH technique. These results were compared to the techniques of D beam injection into D–3He mixture, and 3He-minority ICRH in D plasmas.