This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1016/S0022-3115(02)01518-0 in citations.
Radiation in impurity-seeded discharges in the JET MkI, MkIIA and MkIIGB divertors
Radiation in impurity-seeded discharges in the JET MkI, MkIIA and MkIIGB divertors
Radiative cooling by seeded impurities is a way to reduce the power load on divertor targets. Impurity-seeding experiments carried out in the JET MkI, MkIIA and MkIIGB divertors are discussed, in particular in terms of their radiative properties. A reassessment of the radiation levels in about 235 d...
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Personal Name(s): | Ingesson, L. C. |
---|---|
Rapp, J. / Matthews, G. F. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Journal of nuclear materials, 313-316 (2003) S. 1173 - 1177 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2003
|
Physical Description: |
1173 - 1177 |
DOI: |
10.1016/S0022-3115(02)01518-0 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Journal of Nuclear Materials
313-316 |
Subject (ZB): | |
Publikationsportal JuSER |
Radiative cooling by seeded impurities is a way to reduce the power load on divertor targets. Impurity-seeding experiments carried out in the JET MkI, MkIIA and MkIIGB divertors are discussed, in particular in terms of their radiative properties. A reassessment of the radiation levels in about 235 discharges, seeded predominantly with nitrogen or neon, leads to the conclusion that radiation levels have been underestimated in some impurity-seeded plasmas in MkI and MkIIA. Apart from increased radiation levels, the consequences of the reassessment for the interpretation of impurity-seeded plasmas are limited. With the new estimates the understanding of the power balance and the fit to Matthews' scaling law for Z(eff) are improved. The techniques for improved estimates of the total radiated power and radiated power in the divertor region are discussed and it is shown that weighted summation of bolometer line integrals is unreliable for impurity-seeded discharges in JET. (C) 2003 J. Pamela. Published by Elsevier Science B.V. All rights reserved. |