论文信息 - Gamma-diagnostics of alpha-particles in 4He and D–T plasmas

Gamma-diagnostics of alpha-particles in 4He and D–T plasmas

This article reports on γ-ray diagnosis of ICRF-accelerated 4He ions and fusion α particles used in the JET tokamak. This diagnostic based on the analysis of γ rays emitted in nuclear reaction 9Be(α,nγ)12C. The results of the first observation of the 4.44-MeV γ-radiation due to the reaction 9Be(α,nγ)12C in JET deuterium–tritium experiment (DTE1) are presented. Gamma-ray spectra have been recorded with collimated spectrometer, and the γ-ray emission radial profiles measured with the JET neutron/gamma profile monitor. Doppler broadening effects which could be used for the ICRF-accelerated 4He-ion diagnosis with high energy resolution γ-ray detectors are discussed. Capabilities of the γ-ray measurements in next step D–T devices are discussed.

[1] D. McDonald,et al. First observation of pT fusion in JET tritium plasmas with ICRF heating of protons , 2001 .

[2] A. Mishin,et al. In-Beam Study of the 9 Be(α, n 1 γ) 12 C Reaction and Alpha-Particle Diagnostics , 1992 .

[3] M. J. Mantsinen,et al. γ-ray diagnostics of energetic ions in JET , 2002 .

[4] G. J. Sadler,et al. The JET neutron emission profile monitor , 1993 .

[5] G. Sadler,et al. Gamma ray emission profile measurements from JET ICRF-heated discharges , 1996 .

[6] Richard B. Firestone,et al. Table of Isotopes , 1978 .

[7] G. Sadler,et al. Investigations of fast-particle behavior in joint European torus plasmas using nuclear techniques , 1990 .

[8] M-L Mayoral,et al. Alpha-tail production with ion-cyclotron-resonance heating of 4He-beam ions in JET plasmas. , 2002, Physical review letters.

[9] M-L Mayoral,et al. Controlling the profile of ion-cyclotron-resonant ions in JET with the wave-induced pinch effect. , 2002, Physical review letters.

[10] Vasilij G. Kiptilyj. Capabilities of gamma spectroscopy for fast alpha-particle diagnostics , 1990 .