Charge exchange recombination spectroscopy for {alpha} particles colliding with hydrogen atoms
- Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031 (China)
- Institute of Applied Physics and Computational Mathematics, PO Box 8009, Beijing 100088 (China)
- College of Material Sciences and Optoelectronic Technology, Graduate University of the Chinese Academy of Sciences, PO Box 4588, Beijing 100049 (China)
The intensities of charge exchange recombination spectroscopy (CXRS) of {alpha} particles colliding with the hydrogen atoms in the neutral beam injection (NBI) are calculated by solving the rate equations including electron collision processes in the quasi-static state approximation. The effects of electron collision processes on the CXRS signals for He{sup +}(n=4{yields}3) at {lambda}=468.6nm in various plasma conditions are discussed, and it is found that these effects can increase the CXRS signals by 50% for electron density n{sub e}{>=}10{sup 15}cm{sup -3}. However, their importance decreases with the increasing of NBI energy. For the short pulse of NBI, the influences of electron collision processes can be neglected for n{sub e}{<=}10{sup 14}cm{sup -3}. Furthermore, the spectra of He{sup +}(n{yields}n') are present for the plasma conditions of HT-7 tokamak.
- OSTI ID:
- 22046989
- Journal Information:
- Physics of Plasmas, Vol. 18, Issue 10; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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