Effect of boronization on ohmic plasmas in NSTX

被引：38

作者：

Skinner, CH

Kugel, HW

Maingi, R

Wampler, WR

Blanchard, W

Bell, MG

Bell, RE

Gates, DA

Kaye, SM

LaMarche, P

LeBlanc, BP

Menard, JE

Mueller, D

Na, HK

Nishino, N

Paoletti, F

Paul, SF

Sabbagh, SA

Soukhanovskii, VA

Stutman, D

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

[3] Korea Basic Sci Inst, Taejon, South Korea

[4] Hiroshima Univ, Hiroshima, Japan

[5] Columbia Univ, New York, NY USA

[6] Johns Hopkins Univ, Baltimore, MD USA

来源：

NUCLEAR FUSION | 2002年 / 42卷 / 03期

关键词：

D O I：

10.1088/0029-5515/42/3/313

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Boronization of NSTX has allowed 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(18) cm(-2) corresponding to a film thickness of 100 nm. Subsequent ohmic discharges showed oxygen emission lines reduced by a factor of 15, carbon emission reduced by a factor of two and copper reduced to undetectable levels. After boronization, the plasma current flat-top time increased by 70% enabling access to higher density higher confinement plasmas.

引用

页码：329 / 332

页数：4

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