The fast deuteron (non-Maxwellian component) diagnostic method, which is based on the higher resolution optical spectroscopic measurement, has been developed as a powerful tool. Owing to a decrease in the D–H charge-exchange cross section, the diagnostic ability of conventional optical diagnostic methods should be improved for ∼MeV energy deuterons. Because the ³He–H charge-exchange cross section is much larger than that of D–H in the ∼MeV energy range, the visible light (VIS) spectrum of ³He produced by the dueteron–dueteron (DD) reaction may be a useful tool. Although the density of ³He is small because it is produced via the DD reaction, improvement of the emissivity of the VIS spectrum of ³He can be expected by using a high-energy beam. We evaluate the VIS spectrum of ³He for the cases when a fast deuteron tail is formed and not formed in the ITER-like beam injected deuterium plasma. Even when the beam energy is in the MeV energy range, a large change appears in the half width at half maximum of the VIS spectrum. The emissivity of the VIS spectrum of ³He and the emissivity of bremsstrahlung are compared, and the measurable VIS spectrum is obtained. It is shown that the VIS spectrum of ³He is a useful tool for the MeV beam deuteron tail diagnostics.

中文翻译：

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使用氘等离子体中氘-氘反应产生的 3 He 的可见光光谱快速诊断氘

基于更高分辨率光学光谱测量的快速氘核（非麦克斯韦分量）诊断方法已被开发为一种强大的工具。由于D–H电荷交换截面的减小，对于MeV能量氘，常规光学诊断方法的诊断能力应得到提高。由于³ He–H 电荷交换截面在∼MeV 能量范围内远大于 D–H 的电荷交换截面，因此由 Dueteron-dueteron (DD) 反应产生的³ He的可见光 (VIS) 光谱可能是有用的工具。虽然密度³，因为它是通过DD反应，的VIS光谱的发射率的改善产生他是小³他可以通过使用高能光束来预期。我们评估了³ He的 VIS 光谱，适用于在类 ITER 束注入的氘等离子体中形成快速氘尾而不形成的情况。即使当光束能量在 MeV 能量范围内时，VIS 光谱的半峰宽也会出现很大的变化。比较了³ He的VIS光谱的发射率和韧致辐射的发射率，得到了可测量的VIS光谱。结果表明，³ He的 VIS 光谱是 MeV 束氘核尾部诊断的有用工具。