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

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

2 Scopus citations

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",

publisher = "IOP Publishing",

number = "6",

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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 - https://www.scopus.com/pages/publications/0026173563

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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