Magnetic fluctuations in currentless plasmas in the atf torsatron

J. H. Harris; J. L. Dunlap; V. K. Paré; G. L. Bell; T. S. Bigelow; A. C. England; J. C. Glowienka; L. D. Horton; H. C. Howe; R. C. Isler; M. M. Menon; M. Murakami; D. A. Rasmussen; J. B. Wilgen; W. R. Wing; R. N. Morris; G. H. Neilson

doi:10.1088/0029-5515/31/6/007

Magnetic fluctuations in currentless plasmas in the atf torsatron

J. H. Harris, J. L. Dunlap, V. K. Paré, G. L. Bell, T. S. Bigelow, A. C. England, J. C. Glowienka, L. D. Horton, H. C. Howe, R. C. Isler, M. M. Menon, M. Murakami, D. A. Rasmussen, J. B. Wilgen, W. R. Wing, R. N. Morris, G. H. Neilson

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Abstract

Measurements of poloidal magnetic field fluctuations outside currentless, finite-beta ((β)≤0.5%, β₀ ≤3%) plasmas with peaked pressure profiles in the Advanced Toroidal Facility (ATF) torsatron reveal bands of small (B_g/B_θ -10^-5), coherent fluctuations in the frequency range 5-60 kHz. The geometrical structure of these fluctuations shows n = 1 toroidal mode symmetry, with inferred poloidal mode numbers of m = 2 and 3. The coherent B_&thgr; amplitudes increase with (β) for &(β)≤ 0.3%, and then saturate and begin to decrease with (β) for &(β)≥ 0.3%.

Original language	English
Pages (from-to)	1099-1106
Number of pages	8
Journal	Nuclear Fusion
Volume	31
Issue number	6
DOIs	https://doi.org/10.1088/0029-5515/31/6/007
State	Published - Jun 1991

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Harris, J. H., Dunlap, J. L., Paré, V. K., Bell, G. L., Bigelow, T. S., England, A. C., Glowienka, J. C., Horton, L. D., Howe, H. C., Isler, R. C., Menon, M. M., Murakami, M., Rasmussen, D. A., Wilgen, J. B., Wing, W. R., Morris, R. N., & Neilson, G. H. (1991). Magnetic fluctuations in currentless plasmas in the atf torsatron. Nuclear Fusion, 31(6), 1099-1106. https://doi.org/10.1088/0029-5515/31/6/007

@article{7e5f8cd977ae458eaa2c608bd540fceb,

title = "Magnetic fluctuations in currentless plasmas in the atf torsatron",

abstract = "Measurements of poloidal magnetic field fluctuations outside currentless, finite-beta ((β)≤0.5%, β0 ≤3%) plasmas with peaked pressure profiles in the Advanced Toroidal Facility (ATF) torsatron reveal bands of small (Bg/Bθ -10-5), coherent fluctuations in the frequency range 5-60 kHz. The geometrical structure of these fluctuations shows n = 1 toroidal mode symmetry, with inferred poloidal mode numbers of m = 2 and 3. The coherent B&thgr; amplitudes increase with (β) for &(β)≤ 0.3%, and then saturate and begin to decrease with (β) for &(β)≥ 0.3%.",

author = "Harris, {J. H.} and Dunlap, {J. L.} and Par{\'e}, {V. K.} and Bell, {G. L.} and Bigelow, {T. S.} and England, {A. C.} and Glowienka, {J. C.} and Horton, {L. D.} and Howe, {H. C.} and Isler, {R. C.} and Menon, {M. M.} and M. Murakami and Rasmussen, {D. A.} and Wilgen, {J. B.} and Wing, {W. R.} and Morris, {R. N.} and Neilson, {G. H.}",

year = "1991",

month = jun,

doi = "10.1088/0029-5515/31/6/007",

language = "English",

volume = "31",

pages = "1099--1106",

journal = "Nuclear Fusion",

issn = "0029-5515",

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TY - JOUR

T1 - Magnetic fluctuations in currentless plasmas in the atf torsatron

AU - Harris, J. H.

AU - Dunlap, J. L.

AU - Paré, V. K.

AU - Bell, G. L.

AU - Bigelow, T. S.

AU - England, A. C.

AU - Glowienka, J. C.

AU - Horton, L. D.

AU - Howe, H. C.

AU - Isler, R. C.

AU - Menon, M. M.

AU - Murakami, M.

AU - Rasmussen, D. A.

AU - Wilgen, J. B.

AU - Wing, W. R.

AU - Morris, R. N.

AU - Neilson, G. H.

PY - 1991/6

Y1 - 1991/6

N2 - Measurements of poloidal magnetic field fluctuations outside currentless, finite-beta ((β)≤0.5%, β0 ≤3%) plasmas with peaked pressure profiles in the Advanced Toroidal Facility (ATF) torsatron reveal bands of small (Bg/Bθ -10-5), coherent fluctuations in the frequency range 5-60 kHz. The geometrical structure of these fluctuations shows n = 1 toroidal mode symmetry, with inferred poloidal mode numbers of m = 2 and 3. The coherent B&thgr; amplitudes increase with (β) for &(β)≤ 0.3%, and then saturate and begin to decrease with (β) for &(β)≥ 0.3%.

AB - Measurements of poloidal magnetic field fluctuations outside currentless, finite-beta ((β)≤0.5%, β0 ≤3%) plasmas with peaked pressure profiles in the Advanced Toroidal Facility (ATF) torsatron reveal bands of small (Bg/Bθ -10-5), coherent fluctuations in the frequency range 5-60 kHz. The geometrical structure of these fluctuations shows n = 1 toroidal mode symmetry, with inferred poloidal mode numbers of m = 2 and 3. The coherent B&thgr; amplitudes increase with (β) for &(β)≤ 0.3%, and then saturate and begin to decrease with (β) for &(β)≥ 0.3%.

UR - http://www.scopus.com/inward/record.url?scp=0026173563&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/31/6/007

DO - 10.1088/0029-5515/31/6/007

M3 - Article

AN - SCOPUS:0026173563

SN - 0029-5515

VL - 31

SP - 1099

EP - 1106

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 6

ER -

Magnetic fluctuations in currentless plasmas in the atf torsatron

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