A current profile model for magnetic analysis of the start-up phase of toroidal plasmas driven by electron cyclotron heating and current drive
作者： T Yoshinaga , M Uchida , H Tanaka , T Maekawa
DOI: 10.1088/0029-5515/47/3/007
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摘要: An estimation model of plasma current density distribution for the start-up phase toroidal plasmas generated by electron cyclotron heating (ECH) in low aspect ratio torus experiment device is presented. The assumes a power law parabolic profile having seven fitting parameters. Its position, extent and broadness (or steepness) are fitted adjusting these parameters to observed magnetic flux signals. adequacy has been examined confirmed comparisons reconstructed profiles resultant poloidal surfaces with images at visible light range various stages discharges, including both initial open field phase, subsequent closed decay after ECH turned off also current-profile limiting experiment. This method may be useful study non-inductive experiments ECH, where there no appropriate MHD constraint on as that full tokamak discharge plasmas.
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sci-hub.se 参考文章(9)
T. Yoshinaga, M. Uchida, H. Tanaka, T. Maekawa, Spontaneous formation of closed-field torus equilibrium via current jump observed in an electron-cyclotron-heated plasma Physical Review Letters. ,vol. 96, pp. 125005- 125005 ,(2006) , 10.1103/PHYSREVLETT.96.125005
Y. S. Hwang, C. B. Forest, D. S. Darrow, G. Greene, M. Ono, Reconstruction of current density distributions in the CDX‐U tokamak Review of Scientific Instruments. ,vol. 63, pp. 4747- 4749 ,(1992) , 10.1063/1.1143628
T Maekawa, Y Terumichi, H Tanaka, M Uchida, T Yoshinaga, S Yamaguchi, H Igami, M Konno, K Katsuura, K Hayashi, Y Abe, J Yamada, S Maebara, T Imai, Formation of spherical tokamak equilibria by ECH in the LATE device Nuclear Fusion. ,vol. 45, pp. 1439- 1445 ,(2005) , 10.1088/0029-5515/45/11/026
A Ejiri, Y Takase, H Kasahara, T Yamada, K Hanada, K. N Sato, H Zushi, K Nakamura, M Sakamoto, H Idei, M Hasegawa, A Iyomasa, N Imamura, K Esaki, M Kitaguchi, K Sasaki, H Hoshika, O Mitarai, N Nishino, RF start-up and sustainment experiments on the TST-2@K spherical tokamak Nuclear Fusion. ,vol. 46, pp. 709- 713 ,(2006) , 10.1088/0029-5515/46/7/003
D.W. Swain, G.H. Neilson, An efficient technique for magnetic analysis of non-circular, high-beta tokamak equilibria Nuclear Fusion. ,vol. 22, pp. 1015- 1030 ,(1982) , 10.1088/0029-5515/22/8/002
R. Raman, T. R. Jarboe, B. A. Nelson, V. A. Izzo, R. G. O’Neill, A. J. Redd, R. J. Smith, Demonstration of plasma startup by coaxial helicity injection. Physical Review Letters. ,vol. 90, pp. 075005- ,(2003) , 10.1103/PHYSREVLETT.90.075005
L.L. Lao, H. St. John, R.D. Stambaugh, A.G. Kellman, W. Pfeiffer, Reconstruction of current profile parameters and plasma shapes in tokamaks Nuclear Fusion. ,vol. 25, pp. 1611- 1622 ,(1985) , 10.1088/0029-5515/25/11/007
M Gryaznevich, V Shevchenko, A Sykes, Plasma formation in START and MAST spherical tokamaks Nuclear Fusion. ,vol. 46, ,(2006) , 10.1088/0029-5515/46/8/S02
C. B. Forest, Y. S. Hwang, M. Ono, G. Greene, T. Jones, W. Choe, M. Schaffer, A. Hyatt, T. Osborne, R. I. Pinsker, C. C. Petty, J. Lohr, S. Lippmann, Investigation of the formation of a fully pressure‐driven tokamak* Physics of Plasmas. ,vol. 1, pp. 1568- 1575 ,(1994) , 10.1063/1.870708