Safety factor measurements on the magnetic axis of the Texas experimental tokamak plasma in Ohmic and electron-cyclotron-resonance heated discharges

L. K. Huang; M. Finkenthal; D. Wróblewski; H. W. Moos; W. P. West; P. E. Phillips; D. C. Sing

doi:10.1103/PhysRevA.45.1089

Safety factor measurements on the magnetic axis of the Texas experimental tokamak plasma in Ohmic and electron-cyclotron-resonance heated discharges

L. K. Huang^*, M. Finkenthal, D. Wróblewski, H. W. Moos, W. P. West, P. E. Phillips, D. C. Sing

^*Corresponding author for this work

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

2 Scopus citations

Abstract

Analysis of the circular polarization of a spectral line emission inside plasmas provides a measurement of the poloidal magnetic field on the Texas experimental tokamak (TEXT). Three sets of different polarimeters, using, respectively, the Ti XVII 3834- line of the intrinsic titanium impurity and the Li I 6708- line of a monoenergetic lithium beam, were developed and operated on TEXT. The safety factor q on the magnetic axis, determined from the measured magnetic field, was found to be near unity in all cases of Ohmically heated sawtoothing and nonsawtoothing discharges, and significantly below unity in the case of electron-cyclotron-resonance heating at the plasma center for high edge q discharges.

Original language	English
Pages (from-to)	1089-1097
Number of pages	9
Journal	Physical Review A
Volume	45
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.45.1089
State	Published - 1992
Externally published	Yes

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title = "Safety factor measurements on the magnetic axis of the Texas experimental tokamak plasma in Ohmic and electron-cyclotron-resonance heated discharges",

abstract = "Analysis of the circular polarization of a spectral line emission inside plasmas provides a measurement of the poloidal magnetic field on the Texas experimental tokamak (TEXT). Three sets of different polarimeters, using, respectively, the Ti XVII 3834- line of the intrinsic titanium impurity and the Li I 6708- line of a monoenergetic lithium beam, were developed and operated on TEXT. The safety factor q on the magnetic axis, determined from the measured magnetic field, was found to be near unity in all cases of Ohmically heated sawtoothing and nonsawtoothing discharges, and significantly below unity in the case of electron-cyclotron-resonance heating at the plasma center for high edge q discharges.",

author = "Huang, {L. K.} and M. Finkenthal and D. Wr{\'o}blewski and Moos, {H. W.} and West, {W. P.} and Phillips, {P. E.} and Sing, {D. C.}",

year = "1992",

doi = "10.1103/PhysRevA.45.1089",

language = "אנגלית",

volume = "45",

pages = "1089--1097",

journal = "Physical Review A",

issn = "1050-2947",

publisher = "American Physical Society",

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T1 - Safety factor measurements on the magnetic axis of the Texas experimental tokamak plasma in Ohmic and electron-cyclotron-resonance heated discharges

AU - Huang, L. K.

AU - Finkenthal, M.

AU - Wróblewski, D.

AU - Moos, H. W.

AU - West, W. P.

AU - Phillips, P. E.

AU - Sing, D. C.

PY - 1992

Y1 - 1992

N2 - Analysis of the circular polarization of a spectral line emission inside plasmas provides a measurement of the poloidal magnetic field on the Texas experimental tokamak (TEXT). Three sets of different polarimeters, using, respectively, the Ti XVII 3834- line of the intrinsic titanium impurity and the Li I 6708- line of a monoenergetic lithium beam, were developed and operated on TEXT. The safety factor q on the magnetic axis, determined from the measured magnetic field, was found to be near unity in all cases of Ohmically heated sawtoothing and nonsawtoothing discharges, and significantly below unity in the case of electron-cyclotron-resonance heating at the plasma center for high edge q discharges.

AB - Analysis of the circular polarization of a spectral line emission inside plasmas provides a measurement of the poloidal magnetic field on the Texas experimental tokamak (TEXT). Three sets of different polarimeters, using, respectively, the Ti XVII 3834- line of the intrinsic titanium impurity and the Li I 6708- line of a monoenergetic lithium beam, were developed and operated on TEXT. The safety factor q on the magnetic axis, determined from the measured magnetic field, was found to be near unity in all cases of Ohmically heated sawtoothing and nonsawtoothing discharges, and significantly below unity in the case of electron-cyclotron-resonance heating at the plasma center for high edge q discharges.

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Safety factor measurements on the magnetic axis of the Texas experimental tokamak plasma in Ohmic and electron-cyclotron-resonance heated discharges

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