Extraction of Poloidal Velocity from Charge Exchange Recombination Spectroscopy Measurements

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A novel approach has been implemented on DIII-D to allow the correct determination of the plasma poloidal velocity from charge exchange spectroscopy measurements. Unlike usual techniques, the need for detailed atomic physics calculations to properly interpret the results is alleviated. Instead, the needed atomic physics corrections are self-consistently determined directly from the measurements, by making use of specially chosen viewing chords. Modeling results are presented that were used to determine a set of views capable of measuring the correction terms. We present the analysis of a quiescent H-mode discharge, illustrating that significant modifications to the velocity profiles are required in ... continued below

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1,016 Kilobytes pages

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Solomon, W.M.; Burrell, K.H.; Gohil, P.; Groebner, R.J. & Baylor, L.R. July 16, 2004.

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Description

A novel approach has been implemented on DIII-D to allow the correct determination of the plasma poloidal velocity from charge exchange spectroscopy measurements. Unlike usual techniques, the need for detailed atomic physics calculations to properly interpret the results is alleviated. Instead, the needed atomic physics corrections are self-consistently determined directly from the measurements, by making use of specially chosen viewing chords. Modeling results are presented that were used to determine a set of views capable of measuring the correction terms. We present the analysis of a quiescent H-mode discharge, illustrating that significant modifications to the velocity profiles are required in these high ion temperature conditions. We also present preliminary measurements providing the first direct comparison of the standard cross-section correction to the atomic physics calculations.

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1,016 Kilobytes pages

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INIS; OSTI as DE00828483

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  • Other Information: PBD: 16 Jul 2004

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  • Report No.: PPPL-3981
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/828483 | External Link
  • Office of Scientific & Technical Information Report Number: 828483
  • Archival Resource Key: ark:/67531/metadc783583

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  • July 16, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • June 10, 2016, 6:22 p.m.

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Solomon, W.M.; Burrell, K.H.; Gohil, P.; Groebner, R.J. & Baylor, L.R. Extraction of Poloidal Velocity from Charge Exchange Recombination Spectroscopy Measurements, report, July 16, 2004; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc783583/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.