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IAEA-CN-SO/A-VII-S MAGNETIC TURBULENCE AND RESISTIVE MHD INSTABILITIES IN A 0.6 < q < 3 POLOIDAL DIVERTOR TOKAMAK Y.Z. AGIM, J.D. CALLEN, Z. CHANG, R.N. DEXTER, J.A. GOETZ, D.E. GRAESSLE, E. HAINES, D. KORTBAWI, M.A. LaPOINTE, R.A. MOYER 1 , Z. NING, S.C. PRAGER, T.D. REMPEL, J.C. SPROTT, I. TAN, E. UCHIMOTO 2 University of Wisconsin, Madison, Wisconsin, United States of America Abstract MAGNETIC TURBULENCE AND RESISTIVE MHD INSTABILITIES IN A 0.6 < q < 3 POLOIDAL DIVERTOR TOKAMAK. Detailed statistical properties of internal magnetic turbulence, and internal disruptions in magnetically and materially limited discharges, are studied in the Tokapole II poloidal divertor tokamak over the safety factor range 0.6 < qa < 3. A non-linear MHD code treats tearing modes in the divertor geometry. I. INTRODUCTION The Tokapole II poloidal divertor tokamak is operated over the range of the cylindrical edge safety factor, qa, between 0.6 and 3 [1], to investigate two topics - internal tokamak turbulence and resistive MHD instabilities in the presence of a divertor separatrix and scrape-off plasma. Both magnetically limited discharges (no scrape-off plates beyond the separatrix) and materially limited discharges (scrape-off plates inserted to the separatrix) are studied. Detailed spatial correlation properties of the magnetic turbulence are measured within the plasma using magnetic probes. Although the fluctuation amplitude increases as qa decreases, qualitative changes in the turbulence properties are not observed, implying that the turbulence over the range 0.6 < qa < 3 might be due to a single underlying cause or set of instabilities. Experimental results on disruptions and tearing modes have been compared with results from a non-linear MHD code which treats both the separatrix and the scrape-off plasma. In both code and experiment it is observed that the m=2, n=1 (2/1) mode and its associated disruptions are suppressed as the q=2 surface 1 University of California-Los Angeles, Los Angeles, CA 90024, USA. 2 Courant Institute, New York University, 251 Mercer Street, New York, NY 10012, USA. 409
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The cover picture shows the inside
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AFGHANISTAN ALBANIA ALGERIA ARGENTI
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PLASMA PHYSICS AND CONTROLLED NUCLE
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EDITORIAL NOTE The Proceedings have
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A. Kaminaga, T. Kaneko, T. Kato, M.
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Improved confinement regimes with O
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Tokamak with strong magnetic field
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Resonant island divertor experiment
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Particle removal capabilities of th
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Inside launch electron cyclotron he
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T. Hjima, S. Ishida, K. Itami, T. I
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T. Yamauchi, I. Nakazawa, K. Hasega
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ARTSIMOVICH MEMORIAL LECTURE C. MAI
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IAEA-CN-50/A-0 5 ceptible to fast r
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IAEA-CN-50/A-0 7 fusion power plant
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FIRST EXPERIMENTS IN TORE SUPRA EQU
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IAEA-CN-50/A-I-1 11 Supra is the fi
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IAEA-CN-50/A-I-1 13 poloidal field
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nee id interfere >res an j-> 1 O E
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i I •O OJ) — '5 c IS 2 HI 1ZI _
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nl 30 .29 .28 .27 26 .25 .24 .23 22
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IAEA-CN-50/A-I-1 However, reasonabl
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IAEA-CN-50/A-I-1 25 will make it po
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IAEA-CN-50/A-I-2 AN OVERVIEW OF TFT
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IAEA-CN-50/A-I-2 29 inner belt limi
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IAEA-CN-50/A-I-2 31 0 10 20 TOTAL P
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5 DC LU LU 3 - 1 - Q Q A 1 A IAEA-C
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IAEA-CN-50/A-I-2 35 The question ar
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0.20 0.15 0.10 Rp= 2.45 m a = 0.79
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: . • • 1 IAEA-CN-50/A-I-2 39 1
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LATEST JET RESULTS AND FUTURE PROSP
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Parameter Plasma major radius (Ro)
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1500 IAEA-CN-50/A-I-3 45 2 4 I, (MA
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IAEA-CN-50/A-I-3 47 3.0 3.5 Major r
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I 15 10 5 0 IAEA-CN-50/A-I-3 49 V \
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IAEA-CN-50/A-I-3 51 Magnetic measur
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0.8 0.6 IAEA-CN-50/A-I-3 53 -0.2 12
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10 0.5 Pulse No: 15376 n(He')/ne=1.
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IAEA-CN-50/A-I-3 57 5 10 15 [Pt-dW/
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10 E X 4 H-mode y 0.2 0.4 0.6 0.8 1
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IAEA-CN-50/A-I-3 61 where V is the
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IAEA-CN-50/A-I-3 63 confinement deg
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IAEA-CN-50/A-I-3 65 References [1 ]
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68 JT-60 TEAM T. TANAKA, Y. TANAKA,
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Ip = 3.2 MA lp = 2.7 MA JT-60TEAM R
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72 JT-60TEAM E5695 0 1 2 3 4 5 6 7
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74 JT-60TEAM 3 : LIH *3.1HA 2.8HA A
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76 JT-60TEAM 4.5 5.0 5.5 6.0 6.5 7.
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78 JT-60TEAM 250 "(a) 200 150 50 n
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80 JT-60 TEAM The further developme
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STABILITY OF HIGH BETA DISCHARGES I
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IAEA-CN-50/A-II-l 85 a typical plas
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0.5- 0- 0.8- 0.4- 0.0- IAEA-CN-50/A
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IAEA-CN-50/A-IM 89 absence of the l
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s.o • .5 (a) IAEA-CN-50/A-II-l 91
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IAEA-CN-50/A-II-l 93 stability limi
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IAEA-CN-50/A-II-l 95 [6] STAMBAUGH,
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98 OKABAYASHI et al. PBX-M maximall
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100 1 .0 .6 .0 -.2 -.4 -.6 1.11 CO
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102 0.5 OKABAYASHI et al. Indentati
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104 OKABAYASHI et al. 40 30 I I I I
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106 OKABAYASHI et al. §1 •a J i
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108 OKABAYASHI et al. -2 1 • •
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MHD ACTIVITIES AND RELATED IMPURITY
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0.5 IAEA-CN-50/A-H-3 113 FIG. 1. St
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0) a. II E IAEA-CN-50/A-H-3 115 1 1
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IAEA-CN-50/A-II-3 117 These observa
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6. CONCLUSIONS IAEA-CN-50/A-II-3 11
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122 GAO et al. With hydrogen plasma
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124 GAO et al. P—3.0 r—8.5 SHOT
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126 GAO et al. a) M >
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128 GAO et al. 0.6 0.3 0.0 50 100 r
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SUPERLOW DENSITY EXPERIMENT ON HT-6
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IAEA-CN-50/A-n-S-l 133 (b) Hard X-r
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IAEA-CN-SO/A-n-5-l 135 0 0.2 0.4 0:
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IAEA-CN-50/A-D-5-2 INVESTIGATION OF
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0.14 0.10 0.09 0.08 0.05 0.04 0.03
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TABLE I. REDUCTION OF Xe (m 2 -s')
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IAEA-CN-50/A-II-5-2 143 (3) The lin
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146 FUSSMANN et al. Abstract IMPROV
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148 FUSSMANN et al. 150- 100- 50- 0
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150 FUSSMANN et al. UJ 100- 50- + 2
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152 FUSSMANN et al. In both regimes
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154 FUSSMANN et al. reduced. With c
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156 FUSSMANN et al. and consequentl
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THE JET H-MODE AT HIGH CURRENT AND
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IAEA-CN-50/A-IH-2 achieve an H-mode
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6.0 40 2.0 (a) 0l=. 5.0 (c) 0 Pulse
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IAEA-CN-50/A-III-2 165 reduced in t
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IAEA-CN-50/A-HI-2 167 near the firs
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IAEA-CN-50/A-III-2 169 plasmas with
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I 3s H-mode 8
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IAEA-CN-50/A-HI-2 173 The steep tem
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IAEA-CN-50/A-III-2 175 available),
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IAEA-CN-50/A-III-2 177 (xi0 19 m 3
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IAEA-CN-50/A-III-2 179 APPENDIX I T
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IAEA-CN-50/A-IH-2 181 [16] Bishop,
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184 ZARNSTORFT et al. Abstract TRAN
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186 ZARNSTORFF et al. X-ray spectro
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188 ZARNSTORFF et al. 8 CM e CM E 2
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190 ZARNSTORFF et al. 1.5 2.0 2.5 n
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IAEA-CN-50/A-III-4 ENERGY CONFINEME
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o O •
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0.3 0.2- 0.1- 0.0 0.8 0.6 0.4 0.2 0
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00 d f CM I- CQ i o o o IAEA-CN-50/
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E m F LU LJU Z o N_ CE UU o / UJ q
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IAEA-CN-50/A-m-4 203 The TB values
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IAEA-CN-50/A-HM 205 [7] OHYABU, N.,
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208 SUZUKI et al. favourable in a c
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210 SUZUKI etal. As the neutral bea
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212 SUZUKI et al. 3. FOUR-PELLET IN
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HEATING OF PEAKED DENSITY PROFILES
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Yd o g a> - c 4 _n ...— 0) n 12 t
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1.3 I" 1 |03 C 0.5 i: 12 8 4 n - Te
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IAEA-CN-50/A-IV-l 221 1 2 3 Q,_-2ff
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2 q(o) 1- 10 1 U • O • IAEA-CN-
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0.3 f0.2 1 5" 0.1 IAEA-CN-50/A-IV-l
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IAEA-CN-50/A-IV-l 227 APPENDIX I TH
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IAEA-CN-50/A-IV-2 PELLET INJECTION
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3 - 2 - 1 - IAEA-CN-50/A-IV-2 231 1
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0 FIG. 4. ONI O £ at o ID c IC 15
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IAEA-CN-50/A-IV-2 0.35 MW 2.6 MW Ga
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IAEA-CN-50/A-IV-2 237 finement. The
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240 AZIZOV et al. TABLE I. TSP PARA
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242 AZIZOV et al. 65 75 85 95 105 1
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244 AZIZOV et al. 30 40 50 60 Ip =
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HIGH TEMPERATURE EXPERIMENTS AND FU
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IAEA-CN-50/A-IV-4 249 FIG. 1. Data
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P ICRHV 2 IAEA-CN-50/A-IV-4 251 FIG
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IAEA-CN-SO/AIV-4 253 FIG. 4. (a) Di
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IAEA-CN-50/A-IV-4 255 The fusion pe
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258 STRACHAN et al. - Z - 1, Steady
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260 STRACHAN et al. 10' 10' Classic
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262 STRACHAN et al. _ 1 s 10* I : 1
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ENERGY CONFINEMENT WITH AUXILIARY H
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E6950(Bi=4.0T) E6956(Bt = 2.7T) °4
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E7558 • IMPROVED 5 6 TIME (S) IAE
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7.0 E - 1 0.0 7.0 0.0 =— \ n; - T
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IAEA-CN-50/A-V-1 273 [9] SHIMOMURA,
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276 ASHRAF et al. However, the conv
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278
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280 ASHRAF et al. Modulation amplit
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282 KIMet al. (a) (b) 410 420 TIME
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284 KIM et al. (b) o 3
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286 KIM et ah In summary, we observ
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288 KAWAHATA et al. TEXT tokamak, t
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290 KAWAHATA et al. ^ 30 °- S-200.
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292 KAWAHATA et al. 0 6 12 18 24 ra
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294 WOOTTON et al. 1. Particle tran
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296 10' N 10° E gio- 1 O (a) 10" 0
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298 WOOTTON et al. ne=3xl0 19 m- 3
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300 ZURRO et al. FIG. 1. Variation
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302 ZURRO et al. Mo) 6 (10"cm- 3 )
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304 ZURRO et al. -140 50 100 f(kHz)
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TRANSPORT STUDIES ON TFTR UTILIZING
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IAEA-CN-50/A-V-4 309 uses the TRANS
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5 g 30 20 < 2.0 Q § 1.0 i 0.5 10 1
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IAEA-CN-50/A-V-4 313 the laser-blow
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IAEA-CN-S0/A-V-4 315 on working gas
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I0 7 ! 10' 1.8 IAEA-CN-50/A-V-4 317
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IAEA-CN-50/A-V-4 319 The difference
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IAEA-CN-50/A-V-4 321 [12] RADEZTSKY
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324 DONNE et al. E CO o FIG. 1. Sho
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326 DONNE et al. 350 300 250 200 15
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328 DONNE et al. 1.0 0.8 - 0.6 - t
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RECENT TEXTOR RESULTS TEXTOR TEAM (
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IAEA-CN-50/A-VI-l 333 line-radiatio
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IAEA-CN-50/A-VI-l 335 These measure
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q(r] 3- 2- 1- - IAEA-CN-50/A-VI-l 3
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IAEA-CN-50/A-VI-l 339 FIG. 4. Sawto
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IAEA-CN-S0/A-VI-2-1 RESONANT ISLAND
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IAEA-CN-50/A-VI-2-1 343 • «• >
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IAEA-CN-50/A-VI-2-1 345 tons. This
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348 EVANS et al. JIPP T-IIU ( minor
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350 EVANS et al. FIG. 3. High speed
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352 EVANS et al. REFERENCES [1] KAR
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354 BAKOS et al. The radiation of t
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356 BAKOS et al. < + s 5 2 1 5 2 10
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Page 414 and 415: 388 NAGAYAMA et al. of the magnetic
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Page 433: IAEA-CN-50/A-VH-4 407 ACKNOWLEDGMEN
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Page 460 and 461: 434 BAGDASAROV et al. 1.5 - 1.0 CD
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458 DIPPEL et al. four outside faci
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460 DIPPEL et al. REFERENCES [1] CO
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462 McCRACKEN et al. and the way in
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464 McCRACKEN et al. TABLE I. IMPUR
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466 McCRACKEN et al. 4. CONCLUSIONS
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468 DE KOCK et al. 2. EXPERIMENTAL
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470 DE KOCK et al. Profiles in dive
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472 DE KOCK et al. rrr 3 Ja. eV lio
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474 DE KOCK et al. discrepancy. How
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INVESTIGATION OF LIMITER SCRAPE-OFF
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-o.i 0 0 -0.2 .J-\ I I I 2 4 6 8 ar
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m 2 3 - 4 > o 3 2 - _ 5 -50 -100 |
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IAEA-CN-50/A-VII-14 MEASUREMENTS OF
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IAEA-CN-50/A-VII-14 have arbitrary
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IAEA-CN-50/A-VH-14 487 TABLE I. SOM
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IAEA-CN-50/A-VII-14 489 r =-D Vn +r
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IAEA-CN-50/A-VII-14 491 thermonucle
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IAEA-CN-50/A-VIM4 493 [11] Christia
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496 BOLTON et al. 70 60 50- £ 40
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498 BOLTON et al. * 3 - 5 T 3 - •
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500 BOLTON et al. SMM 1.0 (s) 0.5 t
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502 BOLTON et al. The Tokamak de Va
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CHARACTERISTICS OF BANANA REGIME CO
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o sz. It 11! IAEA-CN-50/A-VII-16 50
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IAEA-CN-50/A-VIM6 509 The estimated
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PLASMA HEATING AND CURRENT DRIVE (S
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514 ALIKAEVetal. 1. INTRODUCTION Th
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516 ALIKAEVetal. The profiles of ne
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518 ALIKAEV et al. 4 ~ S " 3 1 b
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520 ALIKAEV et al. u n < 3 - 2 r ,
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522 ALIKAEV et al. FIG. 10. Diamagn
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524 ALIKAEV et al. 3.2 _ ^ 3.1 CO 3
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IAEA-CN-50/E-I-2 ELECTRON CYCLOTRON
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IAEA-CN-50/E-I-2 529 2. ELECTRON CY
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4.0 3.0 2.0 1.0 0.0 6.0 4.0- 2.0- 0
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IAEA-CN-50/E-I-2 3. CONFINEMENT WIT
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2.0 . P« (MW) \PNBI 800 1000 1200
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S Q o ERH a. HI Q - AMPL 80- 60- 40
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IAEA-CN-50/E-I-2 539 The ELM-free p
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542 ASHRAF et al. experiments on FT
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544 1.1 ASHRAF et al. Absorption zo
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546 ASHRAF et al. cm from the magne
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548 ASHRAF et al. 20 4 I ,5 £ 10 .
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HIGH POWER ECRH AND ICRF HEATING EX
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IAEA-CN-50/E-I-4 553 0-1 Jr FIG. 2.
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1.2. ICRF experiments IAEA-CN-50/E-
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IAEA-CN-50/E-I-4 557 This effect mi
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100 50 4th 2.0 3,0 IAEA-CN-50/E-I-4
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IAEA-CN-50/E-I-4 561 [3] SATO, M.,
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564 * 0 2 ' 0 20 ? I 0 § 0 50 100
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566 TANAKA et al. and one order sma
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568 TANAKA et al. Figures 3(a)-(i)
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570 TANAKA et al. [2] TANAKA, S., e
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572 WEYNANTS et al. Important aniso
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574 WEYNANTS et al. 05- (c) V. V DI
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576 WEYNANTS et al. 3 eff.o 2 1 •
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578 WEYNANTS et al. 2.06 2.10 2.14
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580 20 EH.rh [kJl WEYNANTS et al. 3
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582 WEYNANTS et al. [II] JACQUINOT,
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584 NOTERDAEME et al. in the start-
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586 NOTERDAEME et al.
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588 NOTERDAEME et al. with the time
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590 NOTERDAEME et al. the small imp
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592 NOTERDAEME et al. 13] NOTERDAEM
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594 START et al. sustained for 1.2
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596 START et al. 300 200 Te (eV) 10
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598 START et al. GAMMA YIELD COUNTS
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600 START et al. 45 t(S) Onset of s
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602 START et al. and the energy con
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,01) |c= 0.4 0.2 0 2 I 0 3 2 • 1
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IAEA-CN-50/E-II-4 609 1 1 I 1 I 1 1
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IAEA-CN-50/E-II-5 FULL-WAVE MODELIN
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IAEA-CN-50/E-II-5 613 When Eq. (4)
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IAEA-CN-50/E-II-5 615 the equations
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IAEA-CN-50/E-H-5 617 I i i i I I I
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1.0 0.9 0.8 0.7 1 0.6 10.5 1 0.4 0.
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LOWER HYBRID EXPERIMENTS IN JT-60 K
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- 2t ji IplMA) OIV LIM 0.7 - A 1.0
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'E - 3 "2 2 - 2 le? Ip(MA) 0.7 1.0
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IAEA-CN-SO/E-m-l 627 circles are da
Page 655 and 656:
STEADY STATE CURRENT DRIVE BY LOWER
Page 657 and 658:
45 2 30 a. " 15 0 7 e s 9 2.5 : ic
Page 659 and 660:
1/1 z 3 163- IAEA-CN-50/E-III-2 633
Page 661 and 662:
50* 70" 90' 110" 130' 150' 170* A*
Page 663 and 664:
IAEA-CN-50/E-III-3 LOWER HYBRID HEA
Page 665 and 666:
1.0 0.8 - _ OOnrr IAEA-CN-50/E-HI-3
Page 667 and 668:
-4 IAEA-CN-50/E-HI-3 641 FIG. 3. Sa
Page 669:
IAEA-CN-50/E-III-3 643 stronger emi
Page 672 and 673:
646 BUDNIKOV et al. 100 50 34 36 38
Page 674 and 675:
648 BUDN1K0V et al. 2 E (keV) F/G.
Page 676 and 677:
650 BUDNIKOV et a). » 4 t 660 f (M
Page 678 and 679:
652 BUDNIKOV et al. •a I -a 10' 1
Page 680 and 681:
654 BUDNIKOV etal. 0.5 CM* ne(x10 1
Page 682 and 683:
656 SCOTT et al. 1. Introduction A
Page 684 and 685:
658 SCOTT et al. FIG. 2. Central ro
Page 686 and 687:
660 SCOTT et al. 30 25 20 - / 1 10
Page 688 and 689:
662 SCOTT et al. The TFTR "supersho
Page 690 and 691:
664 SCOTT et al. Z3 5. 2 ? 1 Ge XXX
Page 692 and 693:
666 SCOTT et al. to drive most or a
Page 695 and 696:
DIII-D NEUTRAL BEAM CURRENT DRIVE E
Page 697 and 698:
IAEA-CN-50/E-III-6 671 2. NEUTRAL B
Page 699 and 700:
3.0 0.0 0.2 0.0 0.2 0.0 30.0 SXR (r
Page 701 and 702:
IAEA-CN-50/E-HKS 675 obtained and i
Page 703 and 704:
0.5- o.o -1 0.2- 0.0- 1.0- 0.6- 4.0
Page 705:
IAEA-CN-50/E-HI-6 679 [17] STRAIT,
Page 708 and 709:
682 OHKAWA et al. 2. CURRENT DRIVE
Page 710 and 711:
684 OHKAWA et al. In terms of the h
Page 712 and 713:
686 OHKAWA et al. regime. For ut <
Page 714 and 715:
688 OHKAWA et al. while holding the
Page 717 and 718:
ICRF HEATING ON THE TFTR TOKAMAK FO
Page 719 and 720:
IAEA-CN-50/E-IV-l 693 4 He plasma a
Page 721 and 722:
300 IAEA-CN-50/E-IV-l 695 -10 o 10
Page 723:
5. Conclusions IAEA-CN-50/E-IV-l 69
Page 726 and 727:
700 ASKINASI et al. 0 120 , 60 RF 1
Page 728 and 729:
702 ASKINASI et al. 240 - \ -3 \ J
Page 730 and 731:
704 ASKINASI et al. TABLE I. LOCATI
Page 732 and 733:
706 ASKINASI et al. REFERENCES [1]
Page 734 and 735:
708 KASILOV et al. current drive me
Page 736 and 737:
710 KASILOV et al. to the two-ion h
Page 738 and 739:
712 KASILOV et al. with the FW exci
Page 740 and 741:
714 KASILOV et al. Similarly, takin
Page 742 and 743:
716 KASILOV et al. If the resonant
Page 744 and 745:
718 KASILOVetal. If eh < e,, Eq. (1
Page 747 and 748:
IAEA-CN-50/E-IV-4 FULL WAVE SOLUTIO
Page 749 and 750:
with IAEA-CN-50/E-IV-4 723 H;(r) =
Page 751 and 752:
3000 m 2000 1000 0 1AEA-CN-50/E-IV-
Page 753 and 754:
IAEA-CN-50/E-IV-5 EXPERIMENTS ON EF
Page 755 and 756:
IAEA-CN-50/E-IV-5 729 0 ""'"10 20 3
Page 757 and 758:
IAEA-CN-50/E-IV-5 731 A, for a net
Page 759 and 760:
IMPROVEMENT OF RF CURRENT DRIVE DEN
Page 761 and 762:
IAEA-CN-S0/E-IV-6 735 A fast wave (
Page 763 and 764:
IAEA-CN-50/E-IV-6 737 electrons. Th
Page 765 and 766:
IAEA-CN-50/E-IV-7 NON-INDUCTIVE STA
Page 767 and 768:
300 200 - 100 - IAEA-CN-50/E-IV-7 7
Page 769 and 770:
IAEA-CN-50/E-IV-7 743 are related t
Page 771 and 772:
IAEA-CN-50/E-IV-7 745 TABLE I. CHAR
Page 773 and 774:
ACCESS TO SECOND STABILITY VIA PROF
Page 775 and 776:
6 5 4 w 3 2 1 0 IAEA-CN-50/E-IV-8 7
Page 777 and 778:
IAEA-CN-50/E-IV-8 751 10 15 20 RF C
Page 779 and 780:
IAEA-CN-50/E-IV-9 ELECTRON CYCLOTRO
Page 781 and 782:
IAEA-CN-50/EIV-9 755 The second mec
Page 783:
IAEA-CN-50/E-IV-9 757 In our case,
Page 786 and 787:
760 COHEN et al. concept of using p
Page 788 and 789:
762 COHEN et al. TABLE I. REPRESENT
Page 790 and 791:
764 COHEN et al. 20 ECH power P (MW
Page 792 and 793:
766 COHEN et al. [3] COHEN, B.I., e
Page 794 and 795:
768 electron velocity distribution
Page 796 and 797:
770 PESlC -02 FIG. 2. Real and imag
Page 798 and 799:
772 PESlC FIG. 5. Real and imaginar
Page 801 and 802:
CHAIRMEN OF SESSIONS Session A-I J.
Page 804:
INTERNATIONAL ATOMIC ENERGY AGENCY
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