We have made the first drift wave study of particle transport in the Experimental Advanced Superconducting Tokamak (Wan et al., Nucl. Fusion 49, 104011 (2009)). The results reveal that collisions make the particle flux more inward in the high collisionality regime. This can be traced back to effects that are quadratic in the collision frequency. The particle pinch is due to electron trapping which is not very efficient in the high collisionality regime so the approach to equilibrium is slow. We have included also the electron temperature gradient (ETG) mode to give the right electron temperature gradient, since the Trapped Electron Mode (TE mode) is weak in this regime. However, at the ETG mode number ions are Boltzmann distributed so the ETG mode does not give particle transport.
REFERENCES
1.
B.
Wan
, EAST and HT-7 Teams, and International collaborators, “Recent experiments in the EAST and HT-7 superconducting tokamaks
,” Nucl. Fusion
49
, 104011
(2009
).2.
J.
Li
and B.
Wan
, EAST Team, and International collaborators, “Recent progress in RF-heating and long pulse experiments on EAST
,” Nucl. Fusion
51
, 094007
(2011
).3.
G. S.
Xu
, B. N.
Wan
, J. G.
Li
, X. Z
Gong
, J. S.
Hu
, J. F.
Shan
, H.
Li
, D. K.
Mansfield
, D. A.
Hupreys
, V.
Naulin
, EAST Team, and International collaborators, “Study on H-mode access at low density with lower hybrid current drive and lithium wall-coatings on the EAST superconducting tokamak
,” Nucl. Fusion
51
, 072001
(2011
).4.
F.
Wagner
and U.
Stroth
, Plasma Phys. Controlled Fusion
35
, 1321
(1993
).5.
A. A.
Ware
, Phys. Rev. Lett.
25
, 916
(1970
).6.
C. S.
Liu
, D. C.
Baxter
, and W. B.
Thompson
, Phys. Rev. Lett.
26
, 621
(1971
).7.
B.
Coppi
and C.
Spight
, Phys. Rev. Lett.
41
, 551
(1978
).8.
T.
Antonsen
, B.
Coppi
, and R.
Englade
, Nucl. Fusion
19
, 641
(1979
).9.
J.
Weiland
, A.
Jarme'n
, and H.
Nordman
, Nucl. Fusion
29
, 1810
(1989
).10.
L.
Garzotti
, X.
Garbet
, P.
Mantica
, V.
Parail
, M.
Valovic
, G.
Corrigan
, D.
Heading
, T. T. C.
Jones
, P.
Lang
, H.
Nordman
, B.
Peguorie
, G.
Saibene
, J.
Spence
, P.
Strand
, J.
Weiland
, and EFDA-JET Contributors, Nucl. Fusion
43
, 1829
(2003
).11.
W. L.
Zhong
, X. L.
Zou
, C.
Bourdelle
, S. D.
Song
, J. F.
Artaud
, T.
Aniel
, and X. R.
Duan
, “Observation of critical gradient for particle transport in the Tore Supra Tokamak
,” Phys. Rev. Lett.
(submitted).12.
J.
Weiland
, in Proceedings of the 28th EPS Conference, Madeira, 2001, Europhysics Conference Abstracts
, Vol. 25A (1991
), p. 633
.13.
14.
J.
Nilsson
and J.
Weiland
, Nucl. Fusion
34
, 803
(1994
).15.
C.
Angioni
, A. G.
Peeters
, G. V.
Pereverzev
, F.
Ryter
, and G.
Tardini
, Phys. Rev. Lett.
90
, 205003
(2003
).16.
G.
Mazzitelli
, M. L.
Apicella
, D.
Frigione
, G.
Maddaluno
, M.
Marinucci
, C.
Mazzotta
, V. P.
Ridolfini
, M.
Romanelli
, G.
Szepesi
, O.
Tudisco
, and FTU Team, Nucl. Fusion
51
, 073006
(2011
).17.
G.
Szepesi
, M.
Romanelli
, A. G.
Peeters
, Y.
Camenen
, E. J.
Casson
, W. A.
Hornsby
, A. P.
Snodin
, D.
Wagner
, and FTU team, Nucl. Fusion
53
, 033007
(2013
);see also
G.
Szepesi
, Ph.D. thesis, University of Warwick
, 2013
.18.
M.
Gaudreau
, A.
Gonhalekar
, M. H.
Hughes
, D.
Overskei
, D. S.
Pappas
, R. R.
Parker
, S. M.
Wolfe
, E.
Apgar
, H. I.
Helava
, I. H.
Hutchinson
, E. S.
Marmar
, and K.
Molvig
, Phys. Rev. Lett.
39
, 1266
(1977
).19.
F.
Romanelli
, W. M.
Tang
, and R. B.
White
, Nucl. Fusion
26
, 1515
(1986
).20.
W.
Horton
, B. G.
Hong
, and W. M.
Tang
, Phys. Fluids
31
, 2971
(1988
).21.
F.
Jenko
, W.
Dorland
, and G. W.
Hammett
, Phys. Plasmas
8
, 4096
(2001
).22.
T.
Rafiq
, A.
Kritz
, J.
Weiland
, A. Y.
Pankin
and L.
Luo
, Phys. Plasmas
20
, 032506
(2013
).23.
J.
Weiland
, Stability and Transport in Magnetic Confinement Systems
(Springer
, New York
, 2012
).24.
25.
X.
Han
, C.
Shao
, X.
Xi
, J.
Zhao
, and Z.
Qing
, Rev. Sci. Instrum.
84
, 053502
(2013
).26.
J.
Weiland
, R.
Singh
, H.
Nordman
, P. K.
Kaw
, A.
Peeters
, and D.
Strinzi
, Nucl. Fusion
49
, 065033
(2009
).27.
M. A.
Mahmood
, A.
Eriksson
, and J.
Weiland
, Phys. Plasmas
17
, 122310
(2010
).© 2013 AIP Publishing LLC.
2013
AIP Publishing LLC
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