Effect of boronization in VEST: Achieving 0.1 MA discharge

J. Yang; S. H. Hong; D. Kim; J. Jang; J. Y. Kim; E. C. Jung; Y. Kim; Y. S. Hwang

doi:10.1016/j.fusengdes.2018.10.021

Effect of boronization in VEST: Achieving 0.1 MA discharge

J. Yang, S. H. Hong, D. Kim, J. Jang, J. Y. Kim, E. C. Jung, Y. Kim, Y. S. Hwang

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Boronization procedure for Versatile Experiment Spherical Torus (VEST) is developed in order to reduce the oxygen impurity during the Ohmic plasma discharge. Carborane (C₂B₁₀H₁₂) powder has been chosen for a safe operation. During the helium glow discharge, the sublimated carborane is diffused into the vacuum vessel, which results in thin boron-containing coatings on the vacuum vessel wall. After the boronization, qualitative changes in visible light intensities of oxygen and boron lines are observed indicating that the water concentration is reduced globally. The quality of discharges is greatly improved: a discharge with less radiative loss is achieved, which leads to a record shot of 0.1 MA plasma current and a nearly doubled pulse length.

Original language	English (US)
Pages (from-to)	358-361
Number of pages	4
Journal	Fusion Engineering and Design
Volume	137
DOIs	https://doi.org/10.1016/j.fusengdes.2018.10.021
State	Published - Dec 2018
Externally published	Yes

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Nuclear Energy and Engineering
General Materials Science
Mechanical Engineering

Keywords

Boronization
Carborane
Spectroscopy
Tokamak

Access to Document

10.1016/j.fusengdes.2018.10.021

Cite this

@article{78981fe46cee49daa459e293b8cadefd,

title = "Effect of boronization in VEST: Achieving 0.1 MA discharge",

abstract = "Boronization procedure for Versatile Experiment Spherical Torus (VEST) is developed in order to reduce the oxygen impurity during the Ohmic plasma discharge. Carborane (C2B10H12) powder has been chosen for a safe operation. During the helium glow discharge, the sublimated carborane is diffused into the vacuum vessel, which results in thin boron-containing coatings on the vacuum vessel wall. After the boronization, qualitative changes in visible light intensities of oxygen and boron lines are observed indicating that the water concentration is reduced globally. The quality of discharges is greatly improved: a discharge with less radiative loss is achieved, which leads to a record shot of 0.1 MA plasma current and a nearly doubled pulse length.",

keywords = "Boronization, Carborane, Spectroscopy, Tokamak",

author = "J. Yang and Hong, \{S. H.\} and D. Kim and J. Jang and Kim, \{J. Y.\} and Jung, \{E. C.\} and Y. Kim and Hwang, \{Y. S.\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = dec,

doi = "10.1016/j.fusengdes.2018.10.021",

language = "English (US)",

volume = "137",

pages = "358--361",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of boronization in VEST

T2 - Achieving 0.1 MA discharge

AU - Yang, J.

AU - Hong, S. H.

AU - Kim, D.

AU - Jang, J.

AU - Kim, J. Y.

AU - Jung, E. C.

AU - Kim, Y.

AU - Hwang, Y. S.

PY - 2018/12

Y1 - 2018/12

N2 - Boronization procedure for Versatile Experiment Spherical Torus (VEST) is developed in order to reduce the oxygen impurity during the Ohmic plasma discharge. Carborane (C2B10H12) powder has been chosen for a safe operation. During the helium glow discharge, the sublimated carborane is diffused into the vacuum vessel, which results in thin boron-containing coatings on the vacuum vessel wall. After the boronization, qualitative changes in visible light intensities of oxygen and boron lines are observed indicating that the water concentration is reduced globally. The quality of discharges is greatly improved: a discharge with less radiative loss is achieved, which leads to a record shot of 0.1 MA plasma current and a nearly doubled pulse length.

AB - Boronization procedure for Versatile Experiment Spherical Torus (VEST) is developed in order to reduce the oxygen impurity during the Ohmic plasma discharge. Carborane (C2B10H12) powder has been chosen for a safe operation. During the helium glow discharge, the sublimated carborane is diffused into the vacuum vessel, which results in thin boron-containing coatings on the vacuum vessel wall. After the boronization, qualitative changes in visible light intensities of oxygen and boron lines are observed indicating that the water concentration is reduced globally. The quality of discharges is greatly improved: a discharge with less radiative loss is achieved, which leads to a record shot of 0.1 MA plasma current and a nearly doubled pulse length.

KW - Boronization

KW - Carborane

KW - Spectroscopy

KW - Tokamak

UR - https://www.scopus.com/pages/publications/85055539679

UR - https://www.scopus.com/inward/citedby.url?scp=85055539679&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2018.10.021

DO - 10.1016/j.fusengdes.2018.10.021

M3 - Article

AN - SCOPUS:85055539679

SN - 0920-3796

VL - 137

SP - 358

EP - 361

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Effect of boronization in VEST: Achieving 0.1 MA discharge

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this