Fast Neutral Pressure Gauges in NSTX

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Successful operation in NSTX of two prototype fast-response micro ionization gauges during plasma operations has motivated us to install five gauges at different toroidal and poloidal locations to measure the edge neutral pressure and its dependence on the type of discharge (L-mode, H-mode, CHI) and the fueling method and location. The edge neutral pressure is also used as an input to the transport analysis codes TRANSP and DEGAS-2. The modified PDX-type Penning gauges are well suited for pressure measurements in the NSTX divertor where the toroidal field is relatively high. Behind the NSTX outer divertor plates where the field is ... continued below

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712 Kilobytes pages

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Raman, R.; Kugel, H.W.; Gernhardt, R.; Provost, T.; Jarboe, T.R. & Soukhanovskii, V. April 26, 2004.

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Description

Successful operation in NSTX of two prototype fast-response micro ionization gauges during plasma operations has motivated us to install five gauges at different toroidal and poloidal locations to measure the edge neutral pressure and its dependence on the type of discharge (L-mode, H-mode, CHI) and the fueling method and location. The edge neutral pressure is also used as an input to the transport analysis codes TRANSP and DEGAS-2. The modified PDX-type Penning gauges are well suited for pressure measurements in the NSTX divertor where the toroidal field is relatively high. Behind the NSTX outer divertor plates where the field is lower, an unshielded fast ion gauge of a new design has been installed. This gauge was developed after laboratory testing of several different designs in a vacuum chamber with applied magnetic fields.

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712 Kilobytes pages

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INIS; OSTI as DE00827840

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  • Other Information: PBD: 26 Apr 2004

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  • Report No.: PPPL-3944
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/827840 | External Link
  • Office of Scientific & Technical Information Report Number: 827840
  • Archival Resource Key: ark:/67531/metadc782048

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Creation Date

  • April 26, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • June 10, 2016, 6:22 p.m.

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Raman, R.; Kugel, H.W.; Gernhardt, R.; Provost, T.; Jarboe, T.R. & Soukhanovskii, V. Fast Neutral Pressure Gauges in NSTX, report, April 26, 2004; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc782048/: accessed August 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.