Overview of results from the ATF torsatron

R. J. Colchin; M. Murakami; E. Anabitarte; F. S.B. Anderson; G. L. Bell; J. D. Bell; T. S. Bigelow; E. C. Crume; J. L. Dunlap; G. R. Dyer; A. C. England; P. W. Fisher; W. A. Gabbard; J. C. Glowienka; R. H. Goulding; J. W. Halliwell; G. R. Hanson; J. H. Harris; G. R. Haste; C. Hidalgo-Vera; D. L. Hillis; S. Hiroe; L. D. Horton; H. C. Howe; D. P. Hutchinson; R. C. Isler; T. C. Jemigan; M. Kwon; R. A. Langley; D. K. Lee; J. F. Lyon; J. W. Lue; C. H. Ma; M. M. Menon; R. N. Morris; P. K. Mioduszewski; G. H. Neilson; A. L. Qualls; D. A. Rasmussen; P. S. Rogers; P. L. Shaw; T. D. Shepard; J. E. Simpkins; S. Sudo; C. E. Thomas; T. Uckan; M. R. Wade; J. B. Wilgen; W. R. Wing; H. Yamadaand; J. J. Zielinski

doi:10.1063/1.859554

Overview of results from the ATF torsatron

R. J. Colchin, M. Murakami, E. Anabitarte, F. S.B. Anderson, G. L. Bell, J. D. Bell, T. S. Bigelow, E. C. Crume, J. L. Dunlap, G. R. Dyer, A. C. England, P. W. Fisher, W. A. Gabbard, J. C. Glowienka, R. H. Goulding, J. W. Halliwell, G. R. Hanson, J. H. Harris, G. R. Haste, C. Hidalgo-VeraD. L. Hillis, S. Hiroe, L. D. Horton, H. C. Howe, D. P. Hutchinson, R. C. Isler, T. C. Jemigan, M. Kwon, R. A. Langley, D. K. Lee, J. F. Lyon, J. W. Lue, C. H. Ma, M. M. Menon, R. N. Morris, P. K. Mioduszewski, G. H. Neilson, A. L. Qualls, D. A. Rasmussen, P. S. Rogers, P. L. Shaw, T. D. Shepard, J. E. Simpkins, S. Sudo, C. E. Thomas, T. Uckan, M. R. Wade, J. B. Wilgen, W. R. Wing, H. Yamadaand, J. J. Zielinski

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Abstract

Experiments involving plasma improvement, confinement scaling, bootstrap currents, and edge fluctuations have been carried out in the Advanced Toroidal Facility (ATF) torsatron [Fusion Technol. 10, 179 (1986)]. Average densities n̄_e≤9x10¹⁹m^-3 have been obtained, with global energy confinement times τ_E^*≤20 msec. Confinement times generally follow the stellarator/torsatron empirical scaling law, τ_SL = 0.17XP^-0.58n_e ^0.69B^0.84a²R^0.75 (with τ_SL in seconds, power P in megawatts, density n_e in 10²⁰ m^-3, and plasma radius a and major radius R in meters). Gas injection during neutral beam injection (NBI) causes increases in n_e, so that τ_E^* does not decrease during NBI. Edge plasma fluctuations are found to exhibit a mode change near the peak of the energy confinement time. Plasma currents observed during electron cyclotron heating have been identified as bootstrap currents.

Original language	English
Pages (from-to)	1347-1352
Number of pages	6
Journal	Physics of Fluids B
Volume	2
Issue number	6
DOIs	https://doi.org/10.1063/1.859554
State	Published - 1990

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Colchin, R. J., Murakami, M., Anabitarte, E., Anderson, F. S. B., Bell, G. L., Bell, J. D., Bigelow, T. S., Crume, E. C., Dunlap, J. L., Dyer, G. R., England, A. C., Fisher, P. W., Gabbard, W. A., Glowienka, J. C., Goulding, R. H., Halliwell, J. W., Hanson, G. R., Harris, J. H., Haste, G. R., ... Zielinski, J. J. (1990). Overview of results from the ATF torsatron. Physics of Fluids B, 2(6), 1347-1352. https://doi.org/10.1063/1.859554

@article{874afb204ac545299390c5a7031e13be,

title = "Overview of results from the ATF torsatron",

abstract = "Experiments involving plasma improvement, confinement scaling, bootstrap currents, and edge fluctuations have been carried out in the Advanced Toroidal Facility (ATF) torsatron [Fusion Technol. 10, 179 (1986)]. Average densities {\=n}e≤9x1019m-3 have been obtained, with global energy confinement times τE*≤20 msec. Confinement times generally follow the stellarator/torsatron empirical scaling law, τSL = 0.17XP-0.58ne 0.69B0.84a2R0.75 (with τSL in seconds, power P in megawatts, density ne in 1020 m-3, and plasma radius a and major radius R in meters). Gas injection during neutral beam injection (NBI) causes increases in ne, so that τE* does not decrease during NBI. Edge plasma fluctuations are found to exhibit a mode change near the peak of the energy confinement time. Plasma currents observed during electron cyclotron heating have been identified as bootstrap currents.",

author = "Colchin, {R. J.} and M. Murakami and E. Anabitarte and Anderson, {F. S.B.} and Bell, {G. L.} and Bell, {J. D.} and Bigelow, {T. S.} and Crume, {E. C.} and Dunlap, {J. L.} and Dyer, {G. R.} and England, {A. C.} and Fisher, {P. W.} and Gabbard, {W. A.} and Glowienka, {J. C.} and Goulding, {R. H.} and Halliwell, {J. W.} and Hanson, {G. R.} and Harris, {J. H.} and Haste, {G. R.} and C. Hidalgo-Vera and Hillis, {D. L.} and S. Hiroe and Horton, {L. D.} and Howe, {H. C.} and Hutchinson, {D. P.} and Isler, {R. C.} and Jemigan, {T. C.} and M. Kwon and Langley, {R. A.} and Lee, {D. K.} and Lyon, {J. F.} and Lue, {J. W.} and Ma, {C. H.} and Menon, {M. M.} and Morris, {R. N.} and Mioduszewski, {P. K.} and Neilson, {G. H.} and Qualls, {A. L.} and Rasmussen, {D. A.} and Rogers, {P. S.} and Shaw, {P. L.} and Shepard, {T. D.} and Simpkins, {J. E.} and S. Sudo and Thomas, {C. E.} and T. Uckan and Wade, {M. R.} and Wilgen, {J. B.} and Wing, {W. R.} and H. Yamadaand and Zielinski, {J. J.}",

year = "1990",

doi = "10.1063/1.859554",

language = "English",

volume = "2",

pages = "1347--1352",

journal = "Physics of Fluids B",

issn = "0899-8221",

number = "6",

}

Colchin, RJ, Murakami, M, Anabitarte, E, Anderson, FSB, Bell, GL, Bell, JD, Bigelow, TS, Crume, EC, Dunlap, JL, Dyer, GR, England, AC, Fisher, PW, Gabbard, WA, Glowienka, JC, Goulding, RH, Halliwell, JW, Hanson, GR, Harris, JH, Haste, GR, Hidalgo-Vera, C, Hillis, DL, Hiroe, S, Horton, LD, Howe, HC, Hutchinson, DP, Isler, RC, Jemigan, TC, Kwon, M, Langley, RA, Lee, DK, Lyon, JF, Lue, JW, Ma, CH, Menon, MM, Morris, RN, Mioduszewski, PK, Neilson, GH, Qualls, AL, Rasmussen, DA, Rogers, PS, Shaw, PL, Shepard, TD, Simpkins, JE, Sudo, S, Thomas, CE, Uckan, T, Wade, MR, Wilgen, JB, Wing, WR, Yamadaand, H & Zielinski, JJ 1990, 'Overview of results from the ATF torsatron', Physics of Fluids B, vol. 2, no. 6, pp. 1347-1352. https://doi.org/10.1063/1.859554

TY - JOUR

T1 - Overview of results from the ATF torsatron

AU - Colchin, R. J.

AU - Murakami, M.

AU - Anabitarte, E.

AU - Anderson, F. S.B.

AU - Bell, G. L.

AU - Bell, J. D.

AU - Bigelow, T. S.

AU - Crume, E. C.

AU - Dunlap, J. L.

AU - Dyer, G. R.

AU - England, A. C.

AU - Fisher, P. W.

AU - Gabbard, W. A.

AU - Glowienka, J. C.

AU - Goulding, R. H.

AU - Halliwell, J. W.

AU - Hanson, G. R.

AU - Harris, J. H.

AU - Haste, G. R.

AU - Hidalgo-Vera, C.

AU - Hillis, D. L.

AU - Hiroe, S.

AU - Horton, L. D.

AU - Howe, H. C.

AU - Hutchinson, D. P.

AU - Isler, R. C.

AU - Jemigan, T. C.

AU - Kwon, M.

AU - Langley, R. A.

AU - Lee, D. K.

AU - Lyon, J. F.

AU - Lue, J. W.

AU - Ma, C. H.

AU - Menon, M. M.

AU - Morris, R. N.

AU - Mioduszewski, P. K.

AU - Neilson, G. H.

AU - Qualls, A. L.

AU - Rasmussen, D. A.

AU - Rogers, P. S.

AU - Shaw, P. L.

AU - Shepard, T. D.

AU - Simpkins, J. E.

AU - Sudo, S.

AU - Thomas, C. E.

AU - Uckan, T.

AU - Wade, M. R.

AU - Wilgen, J. B.

AU - Wing, W. R.

AU - Yamadaand, H.

AU - Zielinski, J. J.

PY - 1990

Y1 - 1990

N2 - Experiments involving plasma improvement, confinement scaling, bootstrap currents, and edge fluctuations have been carried out in the Advanced Toroidal Facility (ATF) torsatron [Fusion Technol. 10, 179 (1986)]. Average densities n̄e≤9x1019m-3 have been obtained, with global energy confinement times τE*≤20 msec. Confinement times generally follow the stellarator/torsatron empirical scaling law, τSL = 0.17XP-0.58ne 0.69B0.84a2R0.75 (with τSL in seconds, power P in megawatts, density ne in 1020 m-3, and plasma radius a and major radius R in meters). Gas injection during neutral beam injection (NBI) causes increases in ne, so that τE* does not decrease during NBI. Edge plasma fluctuations are found to exhibit a mode change near the peak of the energy confinement time. Plasma currents observed during electron cyclotron heating have been identified as bootstrap currents.

AB - Experiments involving plasma improvement, confinement scaling, bootstrap currents, and edge fluctuations have been carried out in the Advanced Toroidal Facility (ATF) torsatron [Fusion Technol. 10, 179 (1986)]. Average densities n̄e≤9x1019m-3 have been obtained, with global energy confinement times τE*≤20 msec. Confinement times generally follow the stellarator/torsatron empirical scaling law, τSL = 0.17XP-0.58ne 0.69B0.84a2R0.75 (with τSL in seconds, power P in megawatts, density ne in 1020 m-3, and plasma radius a and major radius R in meters). Gas injection during neutral beam injection (NBI) causes increases in ne, so that τE* does not decrease during NBI. Edge plasma fluctuations are found to exhibit a mode change near the peak of the energy confinement time. Plasma currents observed during electron cyclotron heating have been identified as bootstrap currents.

UR - http://www.scopus.com/inward/record.url?scp=0041143609&partnerID=8YFLogxK

U2 - 10.1063/1.859554

DO - 10.1063/1.859554

M3 - Article

AN - SCOPUS:0041143609

SN - 0899-8221

VL - 2

SP - 1347

EP - 1352

JO - Physics of Fluids B

JF - Physics of Fluids B

IS - 6

ER -

Overview of results from the ATF torsatron

Abstract

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