B4C solid target boronization of the MST reversed-field pinch

D. J. Den Hartog; M. Cekic; G. Fiksel; S. A. Hokin; R. D. Kendrick; S. C. Prager; M. R. Stoneking

doi:10.1016/0022-3115(93)90328-V

B₄C solid target boronization of the MST reversed-field pinch

D. J. Den Hartog, M. Cekic, G. Fiksel, S. A. Hokin, R. D. Kendrick, S. C. Prager, M. R. Stoneking

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

21 Scopus citations

Abstract

A solid rod of hot-pressed boron carbide is being used as the source of boron during boronization of MST. The most striking result of this procedure is the reduction in oxygen contamination of the plasma (OIII radiation, characteristic of oxygen at the edge, falls by about a factor of 3 after boronization.). The radiated power fraction drops to about half its initial value. Particle reflux from the wall is also lowered, making density control simpler. The rod (12.7 mm diameter) is inserted into the edge plasma of normal high-power RFP discharges. B₄C is ablated from the surface of the rod and deposited in a thin film (a-B/C:H) on the walls and limiters. The energy flux carried by "superthermal" (not "runaway") electrons at the edge of MST appears to enhance the efficient, nondestructive ablation of the boron carbide rod.

Original language	English (US)
Pages (from-to)	177-183
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	200
Issue number	2
DOIs	https://doi.org/10.1016/0022-3115(93)90328-V
State	Published - Apr 1993

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Access to Document

10.1016/0022-3115(93)90328-V

Cite this

@article{e50d5b3dff7248c9b22dbaa7acf47bd3,

title = "B4C solid target boronization of the MST reversed-field pinch",

abstract = "A solid rod of hot-pressed boron carbide is being used as the source of boron during boronization of MST. The most striking result of this procedure is the reduction in oxygen contamination of the plasma (OIII radiation, characteristic of oxygen at the edge, falls by about a factor of 3 after boronization.). The radiated power fraction drops to about half its initial value. Particle reflux from the wall is also lowered, making density control simpler. The rod (12.7 mm diameter) is inserted into the edge plasma of normal high-power RFP discharges. B4C is ablated from the surface of the rod and deposited in a thin film (a-B/C:H) on the walls and limiters. The energy flux carried by {"}superthermal{"} (not {"}runaway{"}) electrons at the edge of MST appears to enhance the efficient, nondestructive ablation of the boron carbide rod.",

author = "{Den Hartog}, {D. J.} and M. Cekic and G. Fiksel and Hokin, {S. A.} and Kendrick, {R. D.} and Prager, {S. C.} and Stoneking, {M. R.}",

year = "1993",

month = apr,

doi = "10.1016/0022-3115(93)90328-V",

language = "English (US)",

volume = "200",

pages = "177--183",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "2",

}

TY - JOUR

T1 - B4C solid target boronization of the MST reversed-field pinch

AU - Den Hartog, D. J.

AU - Cekic, M.

AU - Fiksel, G.

AU - Hokin, S. A.

AU - Kendrick, R. D.

AU - Prager, S. C.

AU - Stoneking, M. R.

PY - 1993/4

Y1 - 1993/4

N2 - A solid rod of hot-pressed boron carbide is being used as the source of boron during boronization of MST. The most striking result of this procedure is the reduction in oxygen contamination of the plasma (OIII radiation, characteristic of oxygen at the edge, falls by about a factor of 3 after boronization.). The radiated power fraction drops to about half its initial value. Particle reflux from the wall is also lowered, making density control simpler. The rod (12.7 mm diameter) is inserted into the edge plasma of normal high-power RFP discharges. B4C is ablated from the surface of the rod and deposited in a thin film (a-B/C:H) on the walls and limiters. The energy flux carried by "superthermal" (not "runaway") electrons at the edge of MST appears to enhance the efficient, nondestructive ablation of the boron carbide rod.

AB - A solid rod of hot-pressed boron carbide is being used as the source of boron during boronization of MST. The most striking result of this procedure is the reduction in oxygen contamination of the plasma (OIII radiation, characteristic of oxygen at the edge, falls by about a factor of 3 after boronization.). The radiated power fraction drops to about half its initial value. Particle reflux from the wall is also lowered, making density control simpler. The rod (12.7 mm diameter) is inserted into the edge plasma of normal high-power RFP discharges. B4C is ablated from the surface of the rod and deposited in a thin film (a-B/C:H) on the walls and limiters. The energy flux carried by "superthermal" (not "runaway") electrons at the edge of MST appears to enhance the efficient, nondestructive ablation of the boron carbide rod.

UR - http://www.scopus.com/inward/record.url?scp=0027578649&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027578649&partnerID=8YFLogxK

U2 - 10.1016/0022-3115(93)90328-V

DO - 10.1016/0022-3115(93)90328-V

M3 - Article

AN - SCOPUS:0027578649

SN - 0022-3115

VL - 200

SP - 177

EP - 183

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 2

ER -

B₄C solid target boronization of the MST reversed-field pinch

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this