Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T

Xin Wang; E. Y. Wang; D. A. Diebold; N. Hershkowitz; T. Intrator; G. Kant; S. Oliva; S. Regan; J. Sorensen; M. Vukovic; G. R. Winz; S. Wukitch; R. Breun; D. A. Brouchous; M. Cekic; B. Cui; M. Doczy; D. Edgell; M. Kishinevsky; J. A. Meyer; Ph Probert

doi:10.1088/0029-5515/35/4/I08

Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T

Xin Wang, E. Y. Wang, D. A. Diebold, N. Hershkowitz, T. Intrator, G. Kant, S. Oliva, S. Regan, J. Sorensen, M. Vukovic, G. R. Winz, S. Wukitch, R. Breun, D. A. Brouchous, M. Cekic, B. Cui, M. Doczy, D. Edgell, M. Kishinevsky, J. A. MeyerPh Probert

Research output: Contribution to journal › Article › peer-review

Abstract

Data are presented showing the first demonstration that H mode plasmas can be produced with a biased electrode in the presence of substantial auxiliary power (the Alfven wave power was roughly twice the corresponding ohmic power). The data also show the first demonstration of Alfven wave heating of electrons during an H mode. Although the H mode has been produced in some tokamaks (without the use of a biased electrode) by auxiliary heating greater than a threshold value dependent on plasma conditions and the auxiliary heating method, for the first time, measurements presented here show that subthreshold Alfven wave power increases the edge particle transport (in both ohmic and H mode plasmas) and that this auxiliary power degrades rather than enhances the biased electrode H mode. In addition, for the first time, it is shown that Alfven waves generated by + pi /2 (as compared with a) phasing result in greater RF fuelling in H mode plasmas.

Original language	English (US)
Article number	I08
Pages (from-to)	475-482
Number of pages	8
Journal	Nuclear Fusion
Volume	35
Issue number	4
DOIs	https://doi.org/10.1088/0029-5515/35/4/I08
State	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Condensed Matter Physics

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Wang, X., Wang, E. Y., Diebold, D. A., Hershkowitz, N., Intrator, T., Kant, G., Oliva, S., Regan, S., Sorensen, J., Vukovic, M., Winz, G. R., Wukitch, S., Breun, R., Brouchous, D. A., Cekic, M., Cui, B., Doczy, M., Edgell, D., Kishinevsky, M., ... Probert, P. (1995). Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T. Nuclear Fusion, 35(4), 475-482. Article I08. https://doi.org/10.1088/0029-5515/35/4/I08

Wang, X, Wang, EY, Diebold, DA, Hershkowitz, N, Intrator, T, Kant, G, Oliva, S, Regan, S, Sorensen, J, Vukovic, M, Winz, GR, Wukitch, S, Breun, R, Brouchous, DA, Cekic, M, Cui, B, Doczy, M, Edgell, D, Kishinevsky, M, Meyer, JA & Probert, P 1995, 'Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T', Nuclear Fusion, vol. 35, no. 4, I08, pp. 475-482. https://doi.org/10.1088/0029-5515/35/4/I08

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title = "Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T",

abstract = "Data are presented showing the first demonstration that H mode plasmas can be produced with a biased electrode in the presence of substantial auxiliary power (the Alfven wave power was roughly twice the corresponding ohmic power). The data also show the first demonstration of Alfven wave heating of electrons during an H mode. Although the H mode has been produced in some tokamaks (without the use of a biased electrode) by auxiliary heating greater than a threshold value dependent on plasma conditions and the auxiliary heating method, for the first time, measurements presented here show that subthreshold Alfven wave power increases the edge particle transport (in both ohmic and H mode plasmas) and that this auxiliary power degrades rather than enhances the biased electrode H mode. In addition, for the first time, it is shown that Alfven waves generated by + pi /2 (as compared with a) phasing result in greater RF fuelling in H mode plasmas.",

author = "Xin Wang and Wang, {E. Y.} and Diebold, {D. A.} and N. Hershkowitz and T. Intrator and G. Kant and S. Oliva and S. Regan and J. Sorensen and M. Vukovic and Winz, {G. R.} and S. Wukitch and R. Breun and Brouchous, {D. A.} and M. Cekic and B. Cui and M. Doczy and D. Edgell and M. Kishinevsky and Meyer, {J. A.} and Ph Probert",

year = "1995",

doi = "10.1088/0029-5515/35/4/I08",

language = "English (US)",

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pages = "475--482",

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T1 - Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T

AU - Wang, Xin

AU - Wang, E. Y.

AU - Diebold, D. A.

AU - Hershkowitz, N.

AU - Intrator, T.

AU - Kant, G.

AU - Oliva, S.

AU - Regan, S.

AU - Sorensen, J.

AU - Vukovic, M.

AU - Winz, G. R.

AU - Wukitch, S.

AU - Breun, R.

AU - Brouchous, D. A.

AU - Cekic, M.

AU - Cui, B.

AU - Doczy, M.

AU - Edgell, D.

AU - Kishinevsky, M.

AU - Meyer, J. A.

AU - Probert, Ph

PY - 1995

Y1 - 1995

N2 - Data are presented showing the first demonstration that H mode plasmas can be produced with a biased electrode in the presence of substantial auxiliary power (the Alfven wave power was roughly twice the corresponding ohmic power). The data also show the first demonstration of Alfven wave heating of electrons during an H mode. Although the H mode has been produced in some tokamaks (without the use of a biased electrode) by auxiliary heating greater than a threshold value dependent on plasma conditions and the auxiliary heating method, for the first time, measurements presented here show that subthreshold Alfven wave power increases the edge particle transport (in both ohmic and H mode plasmas) and that this auxiliary power degrades rather than enhances the biased electrode H mode. In addition, for the first time, it is shown that Alfven waves generated by + pi /2 (as compared with a) phasing result in greater RF fuelling in H mode plasmas.

AB - Data are presented showing the first demonstration that H mode plasmas can be produced with a biased electrode in the presence of substantial auxiliary power (the Alfven wave power was roughly twice the corresponding ohmic power). The data also show the first demonstration of Alfven wave heating of electrons during an H mode. Although the H mode has been produced in some tokamaks (without the use of a biased electrode) by auxiliary heating greater than a threshold value dependent on plasma conditions and the auxiliary heating method, for the first time, measurements presented here show that subthreshold Alfven wave power increases the edge particle transport (in both ohmic and H mode plasmas) and that this auxiliary power degrades rather than enhances the biased electrode H mode. In addition, for the first time, it is shown that Alfven waves generated by + pi /2 (as compared with a) phasing result in greater RF fuelling in H mode plasmas.

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Interaction of Alfven waves with biased H mode plasmas in Phaedrus-T

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