Power load characterization for type-I ELMy H-modes in JET

H. Thomsen; T. Eich; S. Devaux; G. Arnoux; S. Brezinsek; E. Delaluna; W. Fundamenski; A. Herrmann; A. Huber; S. Jachmich; P. Lomas; I. Nunes; G. Saibene; A. Scarabosio; J. Schweinzer

doi:10.1088/0029-5515/51/12/123001

Power load characterization for type-I ELMy H-modes in JET

H. Thomsen, T. Eich, S. Devaux, G. Arnoux, S. Brezinsek, E. Delaluna, W. Fundamenski, A. Herrmann, A. Huber, S. Jachmich, P. Lomas, I. Nunes, G. Saibene, A. Scarabosio, J. Schweinzer

Laboratory for Plasma Physics

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

Abstract

ELM-resolved divertor target power load studies were conducted for a wide range of discharge conditions in the JET tokamak. The magnetic configuration of these discharges was optimized for the fast divertor IR camera observing the outboard target. It is found that the ELM size estimated from the diamagnetic energy is not uniquely determining the ELM energy load at the divertor target. ELM mid-plane integral deposited power widths between 7 and 18 mm are observed, the inter-ELM widths lie in the range 2.5-6 mm. This ELM broadening is found to widen with ELM size. The temporal evolution of the ELM shape was characterized by rise and decay times. The ELM rise times are found to be in the range expected for ITER (250 νs), but the ELM decay is usually larger than assumed for the ITER design.

Original language	English
Article number	123001
Journal	Nuclear Fusion
Volume	51
Issue number	12
DOIs	https://doi.org/10.1088/0029-5515/51/12/123001
Publication status	Published - Dec 2011

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title = "Power load characterization for type-I ELMy H-modes in JET",

abstract = "ELM-resolved divertor target power load studies were conducted for a wide range of discharge conditions in the JET tokamak. The magnetic configuration of these discharges was optimized for the fast divertor IR camera observing the outboard target. It is found that the ELM size estimated from the diamagnetic energy is not uniquely determining the ELM energy load at the divertor target. ELM mid-plane integral deposited power widths between 7 and 18 mm are observed, the inter-ELM widths lie in the range 2.5-6 mm. This ELM broadening is found to widen with ELM size. The temporal evolution of the ELM shape was characterized by rise and decay times. The ELM rise times are found to be in the range expected for ITER (250 νs), but the ELM decay is usually larger than assumed for the ITER design.",

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T1 - Power load characterization for type-I ELMy H-modes in JET

AU - Thomsen, H.

AU - Eich, T.

AU - Devaux, S.

AU - Arnoux, G.

AU - Brezinsek, S.

AU - Delaluna, E.

AU - Fundamenski, W.

AU - Herrmann, A.

AU - Huber, A.

AU - Jachmich, S.

AU - Lomas, P.

AU - Nunes, I.

AU - Saibene, G.

AU - Scarabosio, A.

AU - Schweinzer, J.

PY - 2011/12

Y1 - 2011/12

N2 - ELM-resolved divertor target power load studies were conducted for a wide range of discharge conditions in the JET tokamak. The magnetic configuration of these discharges was optimized for the fast divertor IR camera observing the outboard target. It is found that the ELM size estimated from the diamagnetic energy is not uniquely determining the ELM energy load at the divertor target. ELM mid-plane integral deposited power widths between 7 and 18 mm are observed, the inter-ELM widths lie in the range 2.5-6 mm. This ELM broadening is found to widen with ELM size. The temporal evolution of the ELM shape was characterized by rise and decay times. The ELM rise times are found to be in the range expected for ITER (250 νs), but the ELM decay is usually larger than assumed for the ITER design.

AB - ELM-resolved divertor target power load studies were conducted for a wide range of discharge conditions in the JET tokamak. The magnetic configuration of these discharges was optimized for the fast divertor IR camera observing the outboard target. It is found that the ELM size estimated from the diamagnetic energy is not uniquely determining the ELM energy load at the divertor target. ELM mid-plane integral deposited power widths between 7 and 18 mm are observed, the inter-ELM widths lie in the range 2.5-6 mm. This ELM broadening is found to widen with ELM size. The temporal evolution of the ELM shape was characterized by rise and decay times. The ELM rise times are found to be in the range expected for ITER (250 νs), but the ELM decay is usually larger than assumed for the ITER design.

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SN - 0029-5515

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JO - Nuclear Fusion

JF - Nuclear Fusion

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ER -

Power load characterization for type-I ELMy H-modes in JET

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