Improved radiation measurements on JET - First results from an upgraded bolometer system

A. Huber; K. McCormick; P. Andrew; M. R. de Baar; P. Beaumont; S. Dalley; J. Fink; J. C. Fuchs; K. Fullard; W. Fundamenski; L. C. Ingesson; G. Kirnev; P. Lomas; F. Mast; S. Jachmich; G. F. Matthews; Ph Mertens; A. Meigs; V. Philipps; J. Rapp; G. Saibene; S. Sanders; R. Sartori; M. F. Stamp; W. Zeidner

doi:10.1016/j.jnucmat.2007.01.124

Improved radiation measurements on JET - First results from an upgraded bolometer system

A. Huber, K. McCormick, P. Andrew, M. R. de Baar, P. Beaumont, S. Dalley, J. Fink, J. C. Fuchs, K. Fullard, W. Fundamenski, L. C. Ingesson, G. Kirnev, P. Lomas, F. Mast, S. Jachmich, G. F. Matthews, Ph Mertens, A. Meigs, V. Philipps, J. RappG. Saibene, S. Sanders, R. Sartori, M. F. Stamp, W. Zeidner

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

29 Scopus citations

Abstract

To improve the quality of radiation measurements, two new bolometric cameras with horizontal and vertical views of the plasma cross-section have been installed on JET. These cameras provide measurements with significantly improved spatial resolution, allowing the divertor and main chamber radiation fractions to be clearly resolved. Analysis of radiation profiles under attached and detached divertor conditions as well during the formation of an X-point MARFE (XPM) close to an ohmic density limit are presented. The radiation power fraction γ = P_rad/P_heat increases from 0.5 to 0.8 just before XPM onset. A large fraction of this radiation is located in the divertor (P_rad^div / P_rad^tot = 0.56 at low density and about 0.67 at XPM onset). In addition, spatial distributions of radiation in recent ITER-like configuration discharges are presented.

Original language	English
Pages (from-to)	365-370
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	363-365
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2007.01.124
State	Published - Jun 15 2007
Externally published	Yes

Keywords

Bolometer tomography
Density limit
Detachment
Divertor asymmetry
Divertor radiation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jnucmat.2007.01.124

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Huber, A., McCormick, K., Andrew, P., de Baar, M. R., Beaumont, P., Dalley, S., Fink, J., Fuchs, J. C., Fullard, K., Fundamenski, W., Ingesson, L. C., Kirnev, G., Lomas, P., Mast, F., Jachmich, S., Matthews, G. F., Mertens, P., Meigs, A., Philipps, V., ... Zeidner, W. (2007). Improved radiation measurements on JET - First results from an upgraded bolometer system. Journal of Nuclear Materials, 363-365(1-3), 365-370. https://doi.org/10.1016/j.jnucmat.2007.01.124

@article{c430e6d27e394bceae881e9dc3bb2a8a,

title = "Improved radiation measurements on JET - First results from an upgraded bolometer system",

abstract = "To improve the quality of radiation measurements, two new bolometric cameras with horizontal and vertical views of the plasma cross-section have been installed on JET. These cameras provide measurements with significantly improved spatial resolution, allowing the divertor and main chamber radiation fractions to be clearly resolved. Analysis of radiation profiles under attached and detached divertor conditions as well during the formation of an X-point MARFE (XPM) close to an ohmic density limit are presented. The radiation power fraction γ = Prad/Pheat increases from 0.5 to 0.8 just before XPM onset. A large fraction of this radiation is located in the divertor (Praddiv / Pradtot = 0.56 at low density and about 0.67 at XPM onset). In addition, spatial distributions of radiation in recent ITER-like configuration discharges are presented.",

keywords = "Bolometer tomography, Density limit, Detachment, Divertor asymmetry, Divertor radiation",

author = "A. Huber and K. McCormick and P. Andrew and {de Baar}, {M. R.} and P. Beaumont and S. Dalley and J. Fink and Fuchs, {J. C.} and K. Fullard and W. Fundamenski and Ingesson, {L. C.} and G. Kirnev and P. Lomas and F. Mast and S. Jachmich and Matthews, {G. F.} and Ph Mertens and A. Meigs and V. Philipps and J. Rapp and G. Saibene and S. Sanders and R. Sartori and Stamp, {M. F.} and W. Zeidner",

year = "2007",

month = jun,

day = "15",

doi = "10.1016/j.jnucmat.2007.01.124",

language = "English",

volume = "363-365",

pages = "365--370",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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Huber, A, McCormick, K, Andrew, P, de Baar, MR, Beaumont, P, Dalley, S, Fink, J, Fuchs, JC, Fullard, K, Fundamenski, W, Ingesson, LC, Kirnev, G, Lomas, P, Mast, F, Jachmich, S, Matthews, GF, Mertens, P, Meigs, A, Philipps, V, Rapp, J, Saibene, G, Sanders, S, Sartori, R, Stamp, MF & Zeidner, W 2007, 'Improved radiation measurements on JET - First results from an upgraded bolometer system', Journal of Nuclear Materials, vol. 363-365, no. 1-3, pp. 365-370. https://doi.org/10.1016/j.jnucmat.2007.01.124

TY - JOUR

T1 - Improved radiation measurements on JET - First results from an upgraded bolometer system

AU - Huber, A.

AU - McCormick, K.

AU - Andrew, P.

AU - de Baar, M. R.

AU - Beaumont, P.

AU - Dalley, S.

AU - Fink, J.

AU - Fuchs, J. C.

AU - Fullard, K.

AU - Fundamenski, W.

AU - Ingesson, L. C.

AU - Kirnev, G.

AU - Lomas, P.

AU - Mast, F.

AU - Jachmich, S.

AU - Matthews, G. F.

AU - Mertens, Ph

AU - Meigs, A.

AU - Philipps, V.

AU - Rapp, J.

AU - Saibene, G.

AU - Sanders, S.

AU - Sartori, R.

AU - Stamp, M. F.

AU - Zeidner, W.

PY - 2007/6/15

Y1 - 2007/6/15

N2 - To improve the quality of radiation measurements, two new bolometric cameras with horizontal and vertical views of the plasma cross-section have been installed on JET. These cameras provide measurements with significantly improved spatial resolution, allowing the divertor and main chamber radiation fractions to be clearly resolved. Analysis of radiation profiles under attached and detached divertor conditions as well during the formation of an X-point MARFE (XPM) close to an ohmic density limit are presented. The radiation power fraction γ = Prad/Pheat increases from 0.5 to 0.8 just before XPM onset. A large fraction of this radiation is located in the divertor (Praddiv / Pradtot = 0.56 at low density and about 0.67 at XPM onset). In addition, spatial distributions of radiation in recent ITER-like configuration discharges are presented.

AB - To improve the quality of radiation measurements, two new bolometric cameras with horizontal and vertical views of the plasma cross-section have been installed on JET. These cameras provide measurements with significantly improved spatial resolution, allowing the divertor and main chamber radiation fractions to be clearly resolved. Analysis of radiation profiles under attached and detached divertor conditions as well during the formation of an X-point MARFE (XPM) close to an ohmic density limit are presented. The radiation power fraction γ = Prad/Pheat increases from 0.5 to 0.8 just before XPM onset. A large fraction of this radiation is located in the divertor (Praddiv / Pradtot = 0.56 at low density and about 0.67 at XPM onset). In addition, spatial distributions of radiation in recent ITER-like configuration discharges are presented.

KW - Bolometer tomography

KW - Density limit

KW - Detachment

KW - Divertor asymmetry

KW - Divertor radiation

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U2 - 10.1016/j.jnucmat.2007.01.124

DO - 10.1016/j.jnucmat.2007.01.124

M3 - Article

AN - SCOPUS:34248531661

SN - 0022-3115

VL - 363-365

SP - 365

EP - 370

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-3

ER -

Improved radiation measurements on JET - First results from an upgraded bolometer system

Abstract

Keywords

UN SDGs

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