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Title: Effect of Boronization on Ohmic Plasmas in NSTX

Abstract

Boronization of the National Spherical Torus Experiment (NSTX) has enabled access to higher density, higher confinement plasmas. A glow discharge with 4 mTorr helium and 10% deuterated trimethyl boron deposited 1.7 g of boron on the plasma facing surfaces. Ion beam analysis of witness coupons showed a B+C areal density of 10 to the 18 (B+C) cm to the -2 corresponding to a film thickness of 100 nm. Subsequent ohmic discharges showed oxygen emission lines reduced by x15, carbon emission reduced by two and copper reduced to undetectable levels. After boronization, the plasma current flattop time increased by 70% enabling access to higher density, higher confinement plasmas.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., NJ (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
781481
Report Number(s):
PPPL-3553
TRN: US0102987
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 27 Mar 2001
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; NSTX DEVICE; FIRST WALL; BORON; CARBON; GLOW DISCHARGES; ION BEAMS

Citation Formats

Skinner, C.H., Kugel, H., Maingi, R., Wampler, W.R., Blanchard, W., Bell, M., Bell, R., LeBlanc, B., Gates, D., Kaye, S., LaMarche, P., Menard, J., Mueller, D., Na, H.K., Nishino, N., Paul, S., Sabbagh, S., and Soukhanovskii, V. Effect of Boronization on Ohmic Plasmas in NSTX. United States: N. p., 2001. Web. doi:10.2172/781481.
Skinner, C.H., Kugel, H., Maingi, R., Wampler, W.R., Blanchard, W., Bell, M., Bell, R., LeBlanc, B., Gates, D., Kaye, S., LaMarche, P., Menard, J., Mueller, D., Na, H.K., Nishino, N., Paul, S., Sabbagh, S., & Soukhanovskii, V. Effect of Boronization on Ohmic Plasmas in NSTX. United States. doi:10.2172/781481.
Skinner, C.H., Kugel, H., Maingi, R., Wampler, W.R., Blanchard, W., Bell, M., Bell, R., LeBlanc, B., Gates, D., Kaye, S., LaMarche, P., Menard, J., Mueller, D., Na, H.K., Nishino, N., Paul, S., Sabbagh, S., and Soukhanovskii, V. Tue . "Effect of Boronization on Ohmic Plasmas in NSTX". United States. doi:10.2172/781481. https://www.osti.gov/servlets/purl/781481.
@article{osti_781481,
title = {Effect of Boronization on Ohmic Plasmas in NSTX},
author = {Skinner, C.H. and Kugel, H. and Maingi, R. and Wampler, W.R. and Blanchard, W. and Bell, M. and Bell, R. and LeBlanc, B. and Gates, D. and Kaye, S. and LaMarche, P. and Menard, J. and Mueller, D. and Na, H.K. and Nishino, N. and Paul, S. and Sabbagh, S. and Soukhanovskii, V.},
abstractNote = {Boronization of the National Spherical Torus Experiment (NSTX) has enabled access to higher density, higher confinement plasmas. A glow discharge with 4 mTorr helium and 10% deuterated trimethyl boron deposited 1.7 g of boron on the plasma facing surfaces. Ion beam analysis of witness coupons showed a B+C areal density of 10 to the 18 (B+C) cm to the -2 corresponding to a film thickness of 100 nm. Subsequent ohmic discharges showed oxygen emission lines reduced by x15, carbon emission reduced by two and copper reduced to undetectable levels. After boronization, the plasma current flattop time increased by 70% enabling access to higher density, higher confinement plasmas.},
doi = {10.2172/781481},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 27 00:00:00 EST 2001},
month = {Tue Mar 27 00:00:00 EST 2001}
}

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