Dynamics and stability of divertor detachment in H-mode plasmas on JET

A. R. Field; I Balboa; P Drewelow; J Flanagan; C Guillemaut; J R  Harrison; A Huber; V Huber; Bruce Lipschultz; G. Matthews; A. G. Meigs; Juergen Schmitz; M F  Stamp; N. Walkden; JET contributors

doi:10.1088/1361-6587/aa764c

Dynamics and stability of divertor detachment in H-mode plasmas on JET

A. R. Field, I Balboa, P Drewelow, J Flanagan, C Guillemaut, J R Harrison, A Huber, V Huber, Bruce Lipschultz, G. Matthews, A. G. Meigs, Juergen Schmitz, M F Stamp, N. Walkden , JET contributors

Physics

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

Abstract

The dynamics and stability of divertor detachment in N₂ seeded, type-I, ELMy H-mode plasmas with dominant NBI heating in the JET ITER-like wall device is studied by means of an integrated analysis of diagnostic data from several systems, classifying data relative to the ELM times. It is thereby possible to study the response of the detachment evolution to the control parameters (SOL input power, upstream density and impurity fraction) prevailing during the inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive overview is achieved, including the interaction with the targets at various stages of the ELM cycle, the role of ELMs in affecting the detachment process and the overall performance of the scenario. The results are consistent with previous studies in devices with an ITER-like, metal wall, with the important advance of distinguishing data from intra- and inter-ELM periods. Operation without significant degradation of the core confinement

Original language	English
Article number	095003
Number of pages	37
Journal	Plasma Physics and Controlled Fusion
Volume	59
Issue number	9
DOIs	https://doi.org/10.1088/1361-6587/aa764c
Publication status	Published - 5 Jul 2017

Bibliographical note

© 2017 CCFE. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

Keywords

DIVERTOR
H-MODE
detachment
JET-ILW
stability
EVOLUTION
ELM

Access to Document

10.1088/1361-6587/aa764c

JET_detachment_paper_s2_clean_submitted
© 2017 CCFE. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
Accepted author manuscript, 3.49 MB

http://stacks.iop.org/0741-3335/59/i=9/a=095003

Cite this

Field, A. R., Balboa, I., Drewelow, P., Flanagan, J., Guillemaut, C., Harrison, J. R., Huber, A., Huber, V., Lipschultz, B., Matthews, G., Meigs, A. G., Schmitz, J., Stamp, M. F., Walkden , N., & JET contributors (2017). Dynamics and stability of divertor detachment in H-mode plasmas on JET. Plasma Physics and Controlled Fusion, 59(9), Article 095003. https://doi.org/10.1088/1361-6587/aa764c

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title = "Dynamics and stability of divertor detachment in H-mode plasmas on JET",

abstract = "The dynamics and stability of divertor detachment in N2 seeded, type-I, ELMy H-mode plasmas with dominant NBI heating in the JET ITER-like wall device is studied by means of an integrated analysis of diagnostic data from several systems, classifying data relative to the ELM times. It is thereby possible to study the response of the detachment evolution to the control parameters (SOL input power, upstream density and impurity fraction) prevailing during the inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive overview is achieved, including the interaction with the targets at various stages of the ELM cycle, the role of ELMs in affecting the detachment process and the overall performance of the scenario. The results are consistent with previous studies in devices with an ITER-like, metal wall, with the important advance of distinguishing data from intra- and inter-ELM periods. Operation without significant degradation of the core confinement",

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Field, AR, Balboa, I, Drewelow, P, Flanagan, J, Guillemaut, C, Harrison, JR, Huber, A, Huber, V, Lipschultz, B, Matthews, G, Meigs, AG, Schmitz, J, Stamp, MF, Walkden , N & JET contributors 2017, 'Dynamics and stability of divertor detachment in H-mode plasmas on JET', Plasma Physics and Controlled Fusion, vol. 59, no. 9, 095003. https://doi.org/10.1088/1361-6587/aa764c

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T1 - Dynamics and stability of divertor detachment in H-mode plasmas on JET

AU - Field, A. R.

AU - Balboa, I

AU - Drewelow, P

AU - Flanagan, J

AU - Guillemaut, C

AU - Harrison, J R

AU - Huber, A

AU - Huber, V

AU - Lipschultz, Bruce

AU - Matthews, G.

AU - Meigs, A. G.

AU - Schmitz, Juergen

AU - Stamp, M F

AU - Walkden , N.

AU - JET contributors

N1 - © 2017 CCFE. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2017/7/5

Y1 - 2017/7/5

N2 - The dynamics and stability of divertor detachment in N2 seeded, type-I, ELMy H-mode plasmas with dominant NBI heating in the JET ITER-like wall device is studied by means of an integrated analysis of diagnostic data from several systems, classifying data relative to the ELM times. It is thereby possible to study the response of the detachment evolution to the control parameters (SOL input power, upstream density and impurity fraction) prevailing during the inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive overview is achieved, including the interaction with the targets at various stages of the ELM cycle, the role of ELMs in affecting the detachment process and the overall performance of the scenario. The results are consistent with previous studies in devices with an ITER-like, metal wall, with the important advance of distinguishing data from intra- and inter-ELM periods. Operation without significant degradation of the core confinement

AB - The dynamics and stability of divertor detachment in N2 seeded, type-I, ELMy H-mode plasmas with dominant NBI heating in the JET ITER-like wall device is studied by means of an integrated analysis of diagnostic data from several systems, classifying data relative to the ELM times. It is thereby possible to study the response of the detachment evolution to the control parameters (SOL input power, upstream density and impurity fraction) prevailing during the inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive overview is achieved, including the interaction with the targets at various stages of the ELM cycle, the role of ELMs in affecting the detachment process and the overall performance of the scenario. The results are consistent with previous studies in devices with an ITER-like, metal wall, with the important advance of distinguishing data from intra- and inter-ELM periods. Operation without significant degradation of the core confinement

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KW - H-MODE

KW - detachment

KW - JET-ILW

KW - stability

KW - EVOLUTION

KW - ELM

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DO - 10.1088/1361-6587/aa764c

M3 - Article

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VL - 59

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

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ER -