Estimation of Charge Exchange Recombination Emission Based on Diagnostic Neutral Beam on the Experimental Advanced Superconducting Tokamak
ZHANG Xian-Mei1, WAN Bao-Nian2, WU Zhen-Wei2
1Department of Physics, East China University of Science and Technology, Shanghai 200237
2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
Estimation of Charge Exchange Recombination Emission Based on Diagnostic Neutral Beam on the Experimental Advanced Superconducting Tokamak
ZHANG Xian-Mei1;WAN Bao-Nian2;WU Zhen-Wei2
1Department of Physics, East China University of Science and Technology, Shanghai 200237
2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
摘要Diagnostic neutral beam (DNB) attenuation and charge exchange recombination emission are estimated on EAST tokamak. Approximately 40% of the beam with the energy of 50\,keV can reach the plasma centre (r=0) for the typical parameters of the Experimental Advanced Superconducting Tokamak (EAST) plasma. Emissivities of CVI (n=8→7, 529.0nm) and OVIII (n=10→9, 607.0nm) visible charge exchange recombination emissions based on the DNB are estimated. The emissivities of the visible bremsstrahlung emission near this wavelength are also calculated for comparison. The results show that the charge exchange recombination emission is about two orders of magnitude greater than the bremsstrahlung emission. It is theoretically indicated that the ratio of signal of charge exchange recombination spectroscopy to the noise from background bremsstrahlung emission, S/N, is large enough in the EAST tokamak with the typical designed parameters. The present results are helpful for experiment design of charge-exchange recombination spectroscopy based on the DNB in the EAST tokamak.
Abstract：Diagnostic neutral beam (DNB) attenuation and charge exchange recombination emission are estimated on EAST tokamak. Approximately 40% of the beam with the energy of 50\,keV can reach the plasma centre (r=0) for the typical parameters of the Experimental Advanced Superconducting Tokamak (EAST) plasma. Emissivities of CVI (n=8→7, 529.0nm) and OVIII (n=10→9, 607.0nm) visible charge exchange recombination emissions based on the DNB are estimated. The emissivities of the visible bremsstrahlung emission near this wavelength are also calculated for comparison. The results show that the charge exchange recombination emission is about two orders of magnitude greater than the bremsstrahlung emission. It is theoretically indicated that the ratio of signal of charge exchange recombination spectroscopy to the noise from background bremsstrahlung emission, S/N, is large enough in the EAST tokamak with the typical designed parameters. The present results are helpful for experiment design of charge-exchange recombination spectroscopy based on the DNB in the EAST tokamak.
ZHANG Xian-Mei;WAN Bao-Nian;WU Zhen-Wei. Estimation of Charge Exchange Recombination Emission Based on Diagnostic Neutral Beam on the Experimental Advanced Superconducting Tokamak[J]. 中国物理快报, 2007, 24(2): 487-489.
ZHANG Xian-Mei, WAN Bao-Nian, WU Zhen-Wei. Estimation of Charge Exchange Recombination Emission Based on Diagnostic Neutral Beam on the Experimental Advanced Superconducting Tokamak. Chin. Phys. Lett., 2007, 24(2): 487-489.
[1] Isler R C 1994 Plasma Phys. Control. Fusion 36 171 [2] Fonck R J, Darrow D S and Jaehnig K P 1984 Phys. Rev. A 29 3288 [3] Synakowski E J, Bell R E, Bundy R V et al 1995 Phys.Rev. Lett. 75 3689 [4] Park J and Wurden G Intense Diagnostic Neutral Beam for ITERhttp://wsx.lanl.gov/publication/LANL-IDNB-ITER-white-paper.pdf [5] Hu L Q, Wan B N, Hu C D et al 2004 Rev. Sci. Instrum. 75 3496 [6] Fu P, Song Z Q, Gao G et al 2006 Nucl. Fusion 46S85 [7] Rowan W L and Marmar E S 1997 Rev. Sci. Instrum. 68 300 [8] Beu T A 1985 Comput. Phys. Commun. 36 161 [9] Whyte D G, Wade M R, D F Finkenthal et al 1997 NuclearFusion 38 387
2007, Vol. 24 
