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Title: Fast Neutral Pressure Gauges in NSTX

Abstract

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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., Princeton, NJ (US)
Sponsoring Org.:
USDOE Office of Science (SC) (US)
OSTI Identifier:
827840
Report Number(s):
PPPL-3944
TRN: US0403713
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 26 Apr 2004
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DESIGN; DIVERTORS; IONIZATION; MAGNETIC FIELDS; PLASMA; PLATES; PRESSURE MEASUREMENT; TESTING; TRANSPORT; DIAGNOSTICS; FUSION POWER; GAS DISCHARGES; TOKAMAKS, NSTX

Citation Formats

R. Raman, H.W. Kugel, R. Gernhardt, T. Provost, T.R. Jarboe, and V. Soukhanovskii. Fast Neutral Pressure Gauges in NSTX. United States: N. p., 2004. Web. doi:10.2172/827840.
R. Raman, H.W. Kugel, R. Gernhardt, T. Provost, T.R. Jarboe, & V. Soukhanovskii. Fast Neutral Pressure Gauges in NSTX. United States. doi:10.2172/827840.
R. Raman, H.W. Kugel, R. Gernhardt, T. Provost, T.R. Jarboe, and V. Soukhanovskii. Mon . "Fast Neutral Pressure Gauges in NSTX". United States. doi:10.2172/827840. https://www.osti.gov/servlets/purl/827840.
@article{osti_827840,
title = {Fast Neutral Pressure Gauges in NSTX},
author = {R. Raman and H.W. Kugel and R. Gernhardt and T. Provost and T.R. Jarboe and V. Soukhanovskii},
abstractNote = {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.},
doi = {10.2172/827840},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 26 00:00:00 EDT 2004},
month = {Mon Apr 26 00:00:00 EDT 2004}
}

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