强激光与粒子束, 2011, 23 (8): 2116, 网络出版: 2011-09-20  

托卡马克等离子体电流爬升阶段逃逸电子行为

Runaway electron behaviors in current ramp-up phase in Tokamak
作者单位
1 东华大学 应用物理系, 上海 201620
2 中国科学院 等离子体物理研究所, 合肥 230031
摘要
分析了电流爬升阶段等离子体密度和电流爬升率对逃逸电子行为的影响,研究了低杂波辅助电流驱动条件下的逃逸电子辐射行为。结果发现:电流爬升阶段等离子体密度的大小严重影响了电流爬升阶段甚至电流平顶阶段逃逸电子的行为,较低的等离子体密度将会导致放电过程中比较强的逃逸电子辐射;低能逃逸电子辐射随着电流爬升率的增大而增强;低杂波辅助电流爬升可以有效地节约装置的伏秒数;降低放电过程中的环电压,可有效抑制逃逸电子的产生。
Abstract
Effects of plasma density and current ramp up rate on runaway electrons is investigated in current ramp-up phase. It is found that higher density and lower current ramp-up rate can reduce generation of runaway electrons in current ramp-up phase, even in current flat-top phase. Low plasma density will result in hard runaway electrons emission. Lower hybrid wave (LHW) can drive plasma current in order to reduce loop voltage and save volt-second product of Tokamak in current ramp-up phase. Runaway electrons can also be restrained because of reduced loop voltage.
参考文献

[1] Taylor P L, Kellman A G, Rice B W, et al. Experimental measurements of the current, temperature, and density profile changes during a disruption in the DⅢ-D Tokamak[J].Phys Rev Lett,1996,76(6):916-919.

[2] Whyte D G, Evans T E, Hyatt A W, et al. Rapid inward impurity transport during impurity pellet injection on the DⅢ-D Tokamak[J].Phys Rev Lett,1998,81(20):4392-4395.

[3] Bakhtiari M, Kawano Y, Tamai H, et al. Fast plasma shutdown scenarios in the JT-60U Tokamak using intense mixed gas puffing[J].Nucl Fusion,2002,42(10):1197-1204.

[4] Gill R D. Generation and loss of runaway electrons following disruptions in JET[J].Nucl Fusion,1993,33(11):1613-1635.

[5] Gill R D, Alper B, Edwards A W, et al. Direct observations of runaway electrons during disruptions in the JET Tokamak[J].Nucl Fusion,2000,40(2):163-174.

[6] Lu Hongwei, Hu Liqun, Lin Shiyao, et al.Runaway electron measurements in the EAST Tokamak[J].Contributions to Plasma Physics,,2010,50(2):117-121.

[7] Lu Hongwei, Hu Liqun, Li Yadong, et al. Investigation of fast pitch angle scattering of runaway electrons in the EAST Tokamak[J].Chin Phys B,2010,19:125201.

[8] Lu Hongwei, Hu Liqun, Chen Zhongyong. Observation of runaway electrons in the first EAST Ohmic discharge[J].J Plasma Physics,2008,74(4):445-453.

[9] Lu Hongwei, Hu Liqun, Lin Shiyao, et al, Investigation of anomalous Doppler instability in Ohmic and LHCD discharges in the HT-7 Tokamak[J].Physica Scripta,2010,81:025503.

[10] 卢洪伟,胡立群,林士耀, 等.HT-7托卡马克等离子体Slide-away放电研究[J].物理学报,2010,59(8) 5596-5601.(Lu Hongwei, Hu Liqun, Lin Shiyao, et al. Investigation of slide-away discharges in HT-7 Tokamak.Acta Physica Sinica,2010,59(8):5596-5601)

[11] 钟国强,胡立群,朱玉宝,等,HT-7上氘等离子体放电时中子注量的测量与分析[J].物理学报,2009,58(5):3262-3267.(Zhong Guoqiang, Hu Liqun, Zhu Yubao, et al. Neutron flux measurement and analysis in the HT-7 deuterium plasma.Acta Physica Sinica,2009,58(5):3262-3267)

[12] 郑永真,齐昌炜,丁玄同,等.托卡马克等离子体中内部磁扰动的测量研究[J].物理学报,2006,55(1):294-298.(Zheng Yongzhen, Qi Changwei, Ding Xuantong, et al. Internal magnetic fluctuation in the HL-1M Tokamak.Acta Physica Sinica,2006,55(1):294-298)

卢洪伟, 胡立群, 林士耀, 周瑞杰, 罗家融, 钟方川. 托卡马克等离子体电流爬升阶段逃逸电子行为[J]. 强激光与粒子束, 2011, 23(8): 2116. Lu Hongwei, Hu Liqun, Lin Shiyao, Zhou Ruijie, Luo Jiarong, Zhong Fangchuan. Runaway electron behaviors in current ramp-up phase in Tokamak[J]. High Power Laser and Particle Beams, 2011, 23(8): 2116.

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