| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
|
|
|
|
Estimating the Radial Profile of Edge Plasma Electrical Fluctuations in the IR-T1 Tokamak |
| K. Mikaili Agah*, M. Ghoranneviss, M. K. Salem, A. Salar Elahi, S. Mohammadi, R. Arvin |
Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
|
|
| Cite this article: |
|
K. Mikaili Agah, M. Ghoranneviss, M. K. Salem et al 2013 Chin. Phys. Lett. 30 025202 |
|
|
|
|
Abstract The radial dependence of edge plasma turbulence is investigated in the IR-T1 tokamak. The radial profile of the fluctuation level and spectra are measured using an array of Langmuir probes (rake probe) in the r/a=0.75–1.2 region. In all radial positions the edge plasma is turbulently unstable, with a broad band fluctuation spectrum in the frequency range f= 10–1000 kHz. The relative fluctuation level, as monitored by the ion saturation current J+, is always highest near the wall and decreases monotonically toward the plasma center, while the shape of the fluctuation power spectra is almost unchanged. The result of this experiment shows that in contrast to the more inner regions, the plasma near the wall does not simply have a small density fluctuation about a mean, but rather a shredded structure in which one can imagine that discrete shreds of plasma interact with one another rather than with the average background.
|
|
|
Received: 13 November 2012
Published: 02 March 2013
|
|
| PACS: |
52.55.Fa
|
(Tokamaks, spherical tokamaks)
|
| |
52.55.Dy
|
(General theory and basic studies of plasma lifetime, particle and heat loss, energy balance, field structure, etc.)
|
|
|
|
|
|
[1] Mikaili Agah K, Ghoranneviss M, Salem M K, Salar Elahi A, Mohammadi S and Arvin R 2012 J. Fusion Energy (accepted)
[2] Levinson S J, Beall J M, Powers E J and Bengtson R D 1984 Nucl. Fusion 24 527
[3] Liewer P C 1985 Nucl. Fusion 25 543
[4] Wootton A J, Carreras B A, Matsumoto H, McGuire K, Peebles W A, Ritz C P, Terry P W and Zweben S J 1990 Phys. Fluids B 2 2879
[5] Surko C M and Slusher R E 1983 Science 221 817
[6] Carreras B A 1997 IEEE Trans. Plasma Sci. 25 1281
[7] Endler M 1999 J. Nucl. Mater. 266 84
[8] Horton W 1999 Rev. Mod. Phys. 71 735
[9] Hidalgo C 1995 Plasma Phys. Control. Fusion 37 A53
[10] Carreras B A 2005 J. Nucl. Mater. 337 315
[11] Zweben S J, Boedo J A, Grulke O, Hidalgo C, LaBombard B, Maqueda R J, Scarin P and Terry J L 2007 Plasma Phys. Cont. Fusion 49 S1
[12] Boedo J A 2009 J. Nucl. Mater. 390 29
[13] Zweben S J and Taylor R J 1981 Nucl. Fusion 21 193
[14] Zweben S J Liewer P C and Gould R W 1982 J. Nucl. Mater. 111 39
[15] Proudfoot G and Harbour P J 1980 J. Nucl. Mater. 93 413
[16] LaBombard B 2002 Phys. Plasmas 9 1300
[17] Calderon E, Hidalgo C, Pedrosa M A and Silva C 2004 Rev. Sci. Instrum. 75 4293
[18] Ding W G, Zong Y X, Hua F C, Ming J D and Zhi Q X 1998 Chin. Phys. Lett. 15 510
[19] Hailin Z et al 2010 Plasma Sci. Technol. 12 262
[20] Mazzucato E 1982 Phys. Rev. Lett. 48 1828
[21] Surko C M and Slusher R E 1980 Phys. Fluids 23 2425
[22] Saito T, Hamada Y, Yamashita T, Ikeda M, Nakamura M and Tanaka S 1981 Nucl. Fusion 21 1005
[23] Semet A, Mase A, Peebles W A, Luhmann N C and Zweben S 1980 Phys. Rev. Lett. 45 445
[24] Mazzucato E 1976 Phys. Rev. Lett. 36 792
[25] M Porkolab et al 2006 IEEE Trans. Plasma Sci. 34 229
[26] Yadong L, Jiangang L, Xiaodong Z, Tao Z and Shiyao L 2009 Plasma Sci. Technol. 11 529
[27] Bretz N 1997 Rev. Sci. Instrum. 68 2927
[28] Hartfuss H J, Geist T and Hirsch M 1997 Plasma Phys. Control. Fusion 39 1693
[29] Goodall D H J 1982 J. Nucl. Mater. 111 11
[30] Zweben S J, McChesney J and Gould R W 1983 Nucl. Fusion 23 825
[31] Endler M, Niedermeyer H, Giannone L, Kolzhauer E, Rudyj A, Theimer G and Tsois N 1995 Nucl. Fusion 35 1307
[32] Ming X et al 2011 Plasma Sci. Technol. 13 167
[33] Gentle K W, Liao K, Lee K and Rowan W L 2010 Plasma Sci. Technol. 12 391
[34] Ritz C P et al 1989 Phys. Rev. Lett. 62 1844
[35] Nakano H, Fujisawa A, Shimizu A, Minami T, Yoshimura Y, Okamura S, Matsuoka K and Ohshima S 2004 Rev. Sci. Instrum. 75 3505
[36] Shariatzadeh R, Ghoranneviss M, Emami M and Salem M K 2011 Phys. Scr. 83 15504
[37] staib P 1982 J. Nucl. Mater. 111 109
[38] Laframboise J G and Rubinstein J 1976 Phys. Fluids 19 1900
[39] Zweben S J and Gould R W 1983 Nucl. Fusion 23 1625
[40] C Hidalgo et al 1992 Phys. Rev. Lett. 69 1205 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
