Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak

doi:10.1088/1674-1056/19/12/125201

中国物理B ›› 2010, Vol. 19 ›› Issue (12): 125201-125201.doi: 10.1088/1674-1056/19/12/125201

Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak

卢洪伟, 胡立群, 李亚东, 钟国强, 林士耀, 许平, EAST-Team

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230030, China

收稿日期:2009-12-06 修回日期:2010-04-15 出版日期:2010-12-15 发布日期:2010-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10935004 and 10775041), and partly by JSPS–CAS Core University Program in the field of "Plasma and Nuclear Fusion".

Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak

Lu Hong-Wei(卢洪伟)^†, Hu Li-Qun(胡立群), Li Ya-Dong(李亚东), Zhong Guo-Qiang(钟国强), Lin Shi-Yao(林士耀), Xu Ping(许平), and EAST-Team

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230030, China

Received:2009-12-06 Revised:2010-04-15 Online:2010-12-15 Published:2010-12-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10935004 and 10775041), and partly by JSPS–CAS Core University Program in the field of "Plasma and Nuclear Fusion".

摘要/Abstract

摘要： This paper reports that an experimental investigation of fast pitch angle scattering (FPAS) of runaway electrons in the EAST tokamak has been performed. From the newly developed infrared detector (HgCdTe) diagnostic system, the infrared synchrotron radiation emitted by relativistic electrons can be obtained as a function of time. The FPAS is analysed by means of the infrared detector diagnostic system and the other correlative diagnostic systems (including electron–cyclotron emission, hard x-ray, neutrons). It is found that the intensity of infrared synchrotron radiation and the electron–cyclotron emission signal increase rapidly at the time of FPAS because of the fast increase of pitch angle and the perpendicular velocity of the energetic runaway electrons. The Parail and Pogutse instability is a possible mechanism for the FPAS.

Abstract: This paper reports that an experimental investigation of fast pitch angle scattering (FPAS) of runaway electrons in the EAST tokamak has been performed. From the newly developed infrared detector (HgCdTe) diagnostic system, the infrared synchrotron radiation emitted by relativistic electrons can be obtained as a function of time. The FPAS is analysed by means of the infrared detector diagnostic system and the other correlative diagnostic systems (including electron–cyclotron emission, hard x-ray, neutrons). It is found that the intensity of infrared synchrotron radiation and the electron–cyclotron emission signal increase rapidly at the time of FPAS because of the fast increase of pitch angle and the perpendicular velocity of the energetic runaway electrons. The Parail and Pogutse instability is a possible mechanism for the FPAS.

Key words: runaway electron beam, instability, fast pitch angle scattering, tokamak

中图分类号: (Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.))

52.35.Qz

52.55.Fa (Tokamaks, spherical tokamaks)

卢洪伟, 胡立群, 李亚东, 钟国强, 林士耀, 许平, EAST-Team. Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak[J]. 中国物理B, 2010, 19(12): 125201-125201.

Lu Hong-Wei(卢洪伟), Hu Li-Qun(胡立群), Li Ya-Dong(李亚东), Zhong Guo-Qiang(钟国强), Lin Shi-Yao(林士耀), Xu Ping(许平), and EAST-Team. Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak[J]. Chin. Phys. B, 2010, 19(12): 125201-125201.

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Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak

Investigation of fast pitch angle scattering of runaway electrons in the EAST tokamak

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