Acta Phys. Sin. Vol. 61, No. 7 (2012) HT-7 slide-away * 1) 1) 2) 2) 2) 1) 1) 1) (, ( ), ) 2) (, ) ( ; )

Hele tekst

(1) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. HT-7 slide-away * 1)†. 1). 2). 2). 2). 1). 1). 1) ( , (), 201620 ) 2) ( , 230031 ) ( 2010 11 30 ; 2011 6 22 ). slide-away ; . slide-away . : slide-away ,

(2) , .. : , slide-away , , PACS: 52.25.Fi, 52.35.Hr, 52.55.Dy. 1 . [2] , ωk − nωce = k// v// ,. , Fd = m e vvcoll (v), m e ,. v// , k// . v , vcoll : e4 ne ln Λ (2 + Zeﬀ ), e , vcoll (v) = 4πε20 m2e v 3 n e , ln Λ , ε0 . , ωce

(3) , n .. , Zeﬀ . , , . , .

(4) , , . , [1] . . . n = 0 , (Cherenkov resonance). . (df (v)/dv > 0), , ; . (df (v)/dv < 0), , . n < 0 ,

(5) (anomalous Doppler resonance). , , . : hωk , hk// . . , . δW = δW// + δW⊥ = −hωk.

(6) . ωk ,

(7) ,

(8). δW// = −v// hk// , . *

(9) ( 109-10-0044030),

(10) ( 11D10908),

(11)

(12) ( : 10775030, 11175045)

(13) ITER ( )( 2009GB107006, 2010GB108004, 2009GB106002)

(14) . . † E-mail: hwlu@dhu.edu.cn. http://wulixb.iphy.ac.cn. c 2012 Chinese Physical Society . 075202-1.

(15) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. away . HT-7 .

(16) . slide-. δW⊥ = −h(ωk − v// k// ).. away , . n < 0 (ωk − v// k// ) < 0, ,

(17) δW⊥ > 0. n > 0 (normal Doppler resonance). (ωk > ωce ) , ,

(18) .. slide-away

(19) . slide-away ,

(20)

(21) , . slide-away .. 2 .

(22) , . ne2 1/2 , ωpe = ε0 me eB

(23) ωce = , me ωpe /ωce , .

(24) 1 , #108429 #108433 0.39 s. 0.33 s slide-away . ,

(25) (ECE) . ; , . ,

(26) ,. ; , Hα ,. slide-away .. , .. , . #108433 . , , . , . , ” “. .

(27) , , . , , .

(28) , Hα . , , . , . ,

(29) 1 X . . , . : .. . [3].

(30) . [4,5]. , , , slide-away , ,

(31) . [6]. .

(32). (ITER) . .

(33) , , ; , ( )

(34)

(35). . [7−9].

(36) 1. . . #108429 #108433

(37) ((Ip ) ,. (Vloop ) , (n e )

(38) , (GM-. HL-2A[10] , EAST[11,12] HT-7[13,14] . CdTe) (0.3—1.2 MeV) , (GM-BGO) . . (0.5—8.0 MeV) , (ECE)

(39) . , (Hα ) Hα , (Vis) ). . HT-7

(40) .

(41) 2

(42) 3 slide-away . slide-away , . slide-away . slide-away , slide-.

(43) .

(44) 2 , slide-away . away ωpe /ωce

(45)

(46) , slide-. , (n e /Hα ). 075202-2.

(47) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. , (n e /Hα ) ECE .

(48) . , . .

(49) 3 , #108433 . , . 0.33s slide-away . [2] (ωk − nωce = k// v// ) . , 0.40—0.45 s 0.55—0.60 s .

(50) ,

(51) . .

(52) , (n e /Hα ) . , [15] . .

(53) . ,.

(54) , . slide-away . .

(55) . .

(56) 1 ,. . ,

(57) , .

(58) ..

(59)

(60) [16] . . ,

(61) , ,

(62)

(63) , ..

(64) 2 #108429 (n e /Hα ) .

(65) 4 .

(66) 3 #108433 (n e /Hα ) .

(67) 4 slide-away .

(68) , slide-away

(69) ,

(70) 5 #108429 #108433 (0.3—1.2 MeV) . , ECE . , . . 1 ms 2 ms , . .

(71) 5

(72) 6 #108429 #108433 . , ECE , , . (0.3—1.2 MeV) (0.5—8.0 MeV) . .. .

(73) . , ωpe /ωce . : #108429 #108433 0.39 s 0.33 s. , , ωpe /ωce. slide-away , . , ωpe /ωce

(74) , . . . 075202-3.

(75) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. slide-away , . slide-away

(76) . , . ..

(77) , , ,.

(78) pinch , ,

(79) pinch ,

(80) ,

(81) . ( ) , , ,

(82) ,

(83) . #108433.

(84) 8 #108429 (0.5—8.0 MeV)

(85) . , slide-away

(86)

(87) ,. .

(88) 5

(89) 6 #108433 , #108433 0.45 s ..

(90) 9 #108433 (0.3—1.2 MeV)

(91)

(92) 6 #108429 #108433 (0.5—8.0 MeV) .

(93) 9

(94) 10 #108433 . .

(95) , slide-away . #108433 slide-away 0.33 s, , . .

(96) 9

(97) 10

(98) , slide-away , , , , , . .

(99) 9

(100) 10 , ,

(101) .

(102) 7 #108429 (0.3—1.2 MeV)

(103) . , . . ,

(104)

(105) .

(106) 7

(107) 8 #108429 . , .

(108) ,

(109) . . , . 075202-4.

(110) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. . . . , .

(111) 5

(112) 6 . , . , .. , pinch ,

(113) . , , , . ,

(114) . , .

(115) 12 : 600—700 ms 300—400 ms , ..

(116) 10 #108433 (0.5—8.0 MeV)

(117) .

(118) 12 #108433 . 3 slide-away slide-away .

(119) 11 #108429 . ; slide-away

(120) 11

(121) 12 #108429 #108433 . . .

(122) . ,. ; slide-away . #108429 0.39 s slide-away , . . . , ; ,. : slide-away . , pinch . , ; slide-away . ,

(123) . ,

(124) 11 100—200 ms,. . 200—300 ms, 300—400 ms . . . ; 300—400 ms 600—. : slide-away . 700 ms .. . .

(125) 12 , 100—200 ms, 200—. slide-away . 300 ms, 300—400 ms . : slide-away .

(126) 11

(127) . .

(128) . slide-away. , . . . 300—400 ms 600—700 ms . , . , 600—700 ms , . , . . 075202-5.

(129) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. slide-away . . slide-away .

(130)

(131) , . , .

(132) .

(133)

(134).

(135) .. slide-away ,

(136)

(137) slide-away ,

(138)

(139) . HT-7

(140)

(141) .. [1] Sizyuk V, Hassanein A 2009 Nucl. Fusion 49 095003. [10] Zhang Y P, Yang J W, Liu Y 2009 Chin. Phys. B 18 5385. [2] Jaspers R J E 1995 Ph D. Thesis (Eindhoven University of Tech-. [11] Lu H W, Hu L Q, Chen Z Y J 2008 Plasma Phys. 74 445 [12] Lu H W, Hu L Q, Li Y D, Zhong G Q, Lin S Y, Xu P 2010 Chin.. nology, Netherlands) [3] Einat M, Jerby E 1997 Phys. Rev. E 56 5996. Phys. B 19 125201. [4] Gill R D, Alper B, Edwards A W 2000 Nucl. Fusion 40 163. [13] Lu H W, Hu L Q, Zhou R J, Xu P, Zhong G Q, Lin S Y, Wang S F. [5] Chen Z Y, Wan B N, Lin S Y 2006 Phys. Lett. A 351 413. 2010 Acta Phys. Sin. 59 7175 (in Chinese) [, , . [6] Lu H W, Hu L Q, Lin S Y, Zhong G Q, Zhou R J, Zhang J Z 2010. , , , , 2010 59 7175]. Acta Phys. Sin. 59 5596 (in Chinese) [, , ,. [14] Lu H W, Hu L Q, Zhou R J, Lin S Y, Zhong G Q, Wang S F, Chen. , , 2010 59 5596]. K Y, Xu P, Zhang J Z, Ling B L, Mao S T, Duan Y M 2010 Chin.. [7] Kurzan B, Steuer K H, Fussmann G 1995 Phys. Rev. Lett. 75 4626. Phs. B 19 065201. [8] Esposito B 1996 Plasma Phys. Control. Fusion 38 2035. [15] Chen Z Y, Wan B N, Ling B L 2007 Chin. Phys. Lett. 24 3195. [9] Nishimura E 1983 Japan. J. Appl. Phys. 22 1182. [16] Laurent L, Rax J M 1990 Europhys. Lett. 11 219. 075202-6.

(142) Acta Phys. Sin. Vol. 61, No. 7 (2012) 075202. The effect of gas puffing on plasma during slide-away discharge in the HT-7 tokamak∗ Lu Hong-Wei1)† Zha Xue-Jun1) Hu Li-Qun2) Lin Shi-Yao2) Zhou Rui-Jie2) Luo Jia-Rong1) Zhong Fang-Chuan1) 1) ( Department of Applied Physics, Donghua University, Magnetic Confinement Fusion Research Center (Donghua University), Ministry of Education, Shanghai 201620, China ) 2) ( Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 China ) ( Received 30 November 2010; revised manuscript received 22 June 2011 ). Abstract In tokamak plasma, the discharge will turn into “runaway“ discharge from normal discharge if the plasma density becomes very low. The discharge will enter into “slide-away“ discharge if the density decays to a critical one, in which the confinement of plasma (exactly supper thermal electrons) is better than that in normal discharge. The confinement of plasma and the anomalous Doppler instability during slide-away discharge gas puffing are investigated. The effect of gas puffing on runaway electrons during slide-away discharge is also studied in this paper. It is found that the anomalous Doppler instability can be suppressed by the gas puffing during slide-away discharge, while the confinement of plasma becomes poor, and many high energy runaway electrons occur during gas puffing.. Keywords: tokamak, slide-away discharg, gas puffing, runaway electron PACS: 52.25.Fi, 52.35.Hr, 52.55.Dy. * Project supported by the School Foundation of Donghua University (Grant No. 109-10-0044030), the Fundamental Research Funds for the Central Universities (Grant No.11D10908), the National Natural Science Foundation of China (Grant Nos. 10775030, 11175045), and the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant Nos. 2009GB107006, 2010GB108004, 2009GB106002). † E-mail: hwlu@dhu.edu.cn. 075202-7.

(143)

No results found