Observation of runaway electron beams by visible color camera in the Experimental Advanced Superconducting Tokamak

• Published in: Review of scientific instruments Vol. 81; no. 3; p. 033506
• Main Authors: Shi, Yuejiang, Fu, Jia, Li, Jiahong, Yang, Yu, Wang, Fudi, Li, Yingying, Zhang, Wei, Wan, Baonian, Chen, Zhongyong
• Format: Journal Article
• Language: English
• Published: United States 01.03.2010
• ISSN: 1089-7623
• DOI: 10.1063/1.3340909

The synchrotron radiation originated from the energetic runaway electrons has been measured by a visible complementary metal oxide semiconductor camera working in the wavelength ranges of 380-750 nm in the Experimental Advanced Superconducting Tokamak [H. Q. Liu et al., Plasma Phys. Contr. Fusion 49, 995 (2007)]. With a tangential viewing into the plasma in the direction of electron approach on the equatorial plane, the synchrotron radiation from the energetic runaway electrons was measured in full poloidal cross section. The synchrotron radiation diagnostics provides a direct pattern of the runaway beam inside the plasma. The energy and pitch angle of runaway electrons have been obtained according to the synchrotron radiation pattern. A stable shell shape of synchrotron radiation has been observed in a few runaway discharges.