Transport in Auxiliary Heated NSTX Discharges

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Description

The NSTX spherical torus (ST) provides a unique platform to investigate magnetic confinement in auxiliary-heated plasmas at low aspect ratio. Auxiliary power is routinely coupled to ohmically heated plasmas by deuterium neutral-beam injection (NBI) and by high-harmonic fast waves (HHFW) launch. While theory predicts both techniques to preferentially heat electrons, experiment reveals the electron temperature is greater than the ion temperature during HHFW, but the electron temperature is less than the ion temperature during NBI. In the following we present the experimental data and the results of transport analyses.

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1.1 MB pages

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LeBlanc, B.P.; Bell, M.G.; Bell, R.E.; Bitte, M.L.; Bourdelle, C.; Gates, D.A. et al. July 10, 2003.

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Description

The NSTX spherical torus (ST) provides a unique platform to investigate magnetic confinement in auxiliary-heated plasmas at low aspect ratio. Auxiliary power is routinely coupled to ohmically heated plasmas by deuterium neutral-beam injection (NBI) and by high-harmonic fast waves (HHFW) launch. While theory predicts both techniques to preferentially heat electrons, experiment reveals the electron temperature is greater than the ion temperature during HHFW, but the electron temperature is less than the ion temperature during NBI. In the following we present the experimental data and the results of transport analyses.

Physical Description

1.1 MB pages

Notes

INIS; OSTI as DE00814704

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  • Other Information: PBD: 10 Jul 2003

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  • Report No.: PPPL-3837
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/814704 | External Link
  • Office of Scientific & Technical Information Report Number: 814704
  • Archival Resource Key: ark:/67531/metadc735233

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  • July 10, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • April 15, 2016, 9:56 p.m.

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LeBlanc, B.P.; Bell, M.G.; Bell, R.E.; Bitte, M.L.; Bourdelle, C.; Gates, D.A. et al. Transport in Auxiliary Heated NSTX Discharges, report, July 10, 2003; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc735233/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.