Reduced edge instability and improved confinement in the MST reversed-field pinch

B. E. Chapman; J. K. Anderson; T. M. Biewer; D. L. Brower; S. Castillo; P. K. Chattopadhyay; C. S. Chiang; D. Craig; D. J. Den Hartog; G. Fiksel; P. W. Fontana; C. B. Forest; S. Gerhardt; A. K. Hansen; D. Holly; Y. Jiang; N. E. Lanier; S. C. Prager; J. C. Reardon; J. S. Sarff

doi:10.1103/PhysRevLett.87.205001

Reduced edge instability and improved confinement in the MST reversed-field pinch

B. E. Chapman, J. K. Anderson, T. M. Biewer, D. L. Brower, S. Castillo, P. K. Chattopadhyay, C. S. Chiang, D. Craig, D. J. Den Hartog, G. Fiksel, P. W. Fontana, C. B. Forest, S. Gerhardt, A. K. Hansen, D. Holly, Y. Jiang, N. E. Lanier, S. C. Prager, J. C. Reardon, J. S. Sarff

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

5 Scopus citations

Abstract

Improved confinement has been achieved in the MST through control of the poloidal electric field, but it is now known that the improvement has been limited by bursts of an edge-resonant instability. Through refined poloidal electric field control, plus control of the toroidal electric field, we have suppressed these bursts. This has led to a total beta of 15% and a reversed-field-pinch-record estimated energy confinement time of 10 ms, a tenfold increase over the standard value which for the first time substantially exceeds the confinement scaling that has characterized most reversed-field-pinch plasmas.

Original language	English
Pages (from-to)	205001-1-205001-4
Journal	Physical Review Letters
Volume	87
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.87.205001
State	Published - Nov 12 2001
Externally published	Yes

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Chapman, B. E., Anderson, J. K., Biewer, T. M., Brower, D. L., Castillo, S., Chattopadhyay, P. K., Chiang, C. S., Craig, D., Den Hartog, D. J., Fiksel, G., Fontana, P. W., Forest, C. B., Gerhardt, S., Hansen, A. K., Holly, D., Jiang, Y., Lanier, N. E., Prager, S. C., Reardon, J. C., & Sarff, J. S. (2001). Reduced edge instability and improved confinement in the MST reversed-field pinch. Physical Review Letters, 87(20), 205001-1-205001-4. https://doi.org/10.1103/PhysRevLett.87.205001

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title = "Reduced edge instability and improved confinement in the MST reversed-field pinch",

abstract = "Improved confinement has been achieved in the MST through control of the poloidal electric field, but it is now known that the improvement has been limited by bursts of an edge-resonant instability. Through refined poloidal electric field control, plus control of the toroidal electric field, we have suppressed these bursts. This has led to a total beta of 15% and a reversed-field-pinch-record estimated energy confinement time of 10 ms, a tenfold increase over the standard value which for the first time substantially exceeds the confinement scaling that has characterized most reversed-field-pinch plasmas.",

author = "Chapman, {B. E.} and Anderson, {J. K.} and Biewer, {T. M.} and Brower, {D. L.} and S. Castillo and Chattopadhyay, {P. K.} and Chiang, {C. S.} and D. Craig and {Den Hartog}, {D. J.} and G. Fiksel and Fontana, {P. W.} and Forest, {C. B.} and S. Gerhardt and Hansen, {A. K.} and D. Holly and Y. Jiang and Lanier, {N. E.} and Prager, {S. C.} and Reardon, {J. C.} and Sarff, {J. S.}",

year = "2001",

month = nov,

day = "12",

doi = "10.1103/PhysRevLett.87.205001",

language = "English",

volume = "87",

pages = "205001--1--205001--4",

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issn = "0031-9007",

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Chapman, BE, Anderson, JK, Biewer, TM, Brower, DL, Castillo, S, Chattopadhyay, PK, Chiang, CS, Craig, D, Den Hartog, DJ, Fiksel, G, Fontana, PW, Forest, CB, Gerhardt, S, Hansen, AK, Holly, D, Jiang, Y, Lanier, NE, Prager, SC, Reardon, JC & Sarff, JS 2001, 'Reduced edge instability and improved confinement in the MST reversed-field pinch', Physical Review Letters, vol. 87, no. 20, pp. 205001-1-205001-4. https://doi.org/10.1103/PhysRevLett.87.205001

TY - JOUR

T1 - Reduced edge instability and improved confinement in the MST reversed-field pinch

AU - Chapman, B. E.

AU - Anderson, J. K.

AU - Biewer, T. M.

AU - Brower, D. L.

AU - Castillo, S.

AU - Chattopadhyay, P. K.

AU - Chiang, C. S.

AU - Craig, D.

AU - Den Hartog, D. J.

AU - Fiksel, G.

AU - Fontana, P. W.

AU - Forest, C. B.

AU - Gerhardt, S.

AU - Hansen, A. K.

AU - Holly, D.

AU - Jiang, Y.

AU - Lanier, N. E.

AU - Prager, S. C.

AU - Reardon, J. C.

AU - Sarff, J. S.

PY - 2001/11/12

Y1 - 2001/11/12

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AB - Improved confinement has been achieved in the MST through control of the poloidal electric field, but it is now known that the improvement has been limited by bursts of an edge-resonant instability. Through refined poloidal electric field control, plus control of the toroidal electric field, we have suppressed these bursts. This has led to a total beta of 15% and a reversed-field-pinch-record estimated energy confinement time of 10 ms, a tenfold increase over the standard value which for the first time substantially exceeds the confinement scaling that has characterized most reversed-field-pinch plasmas.

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JO - Physical Review Letters

JF - Physical Review Letters

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Reduced edge instability and improved confinement in the MST reversed-field pinch

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