Narrow limiter SOL power channels and their impact of ITER first wall shaping

Kocan, M.; Pitts, R.A.; Arnoux, G.; Balboa, I.; Dejarnac, Renaud; Furno, I.; Goldston, R.J.; Horáček, Jan; Komm, Michael; Labit, B.; LaBombard, B.; Lasnier, C.J.; Mitteau, R.; Nespoli, F.; Pace, D.; Pánek, Radomír; Stangeby, P.C.; Terry, J.L.; Theiler, C.; Tsui, C.; Vondráček, Petr; Wolfe, S.

Number of the records: 1

Narrow limiter SOL power channels and their impact of ITER first wall shaping

1.

SYSNO ASEP	0433684
Document Type	A - Abstract
R&D Document Type	The record was not marked in the RIV
R&D Document Type	Není vybrán druh dokumentu
Title	Narrow limiter SOL power channels and their impact of ITER first wall shaping
Author(s)	Kocan, M. (FR) Pitts, R.A. (FR) Arnoux, G. (GB) Balboa, I. (GB) Dejarnac, Renaud (UFP-V)_{RID, ORCID} Furno, I. (DK) Goldston, R.J. (US) Horáček, Jan (UFP-V)_{RID, ORCID} Komm, Michael (UFP-V)_{RID, ORCID} Labit, B. (CH) LaBombard, B. (US) Lasnier, C.J. (US) Mitteau, R. (FR) Nespoli, F. (IT) Pace, D. (IT) Pánek, Radomír (UFP-V)_RID Stangeby, P.C. (CA) Terry, J.L. (US) Theiler, C. (CH) Tsui, C. (US) Vondráček, Petr (UFP-V)_{RID, ORCID} Wolfe, S. (DE)
Number of authors	23
Source Title	Bulletin of the American Physical Society - ISSN 0003-0503 Roč. 59, č. 5 (2014), JI1:00001
Number of pages	1 s.
Action	Annual Meeting of the APS Division of Plasma Physics /56./
Event date	27.10.2014-31.10.2014
VEvent location	New Orleans, Louisiana
Country	US - United States
Event type	WRD
Language	eng - English
Country	US - United States
Keywords	ITER ; power flux ; limiter ; narrow channel
Subject RIV	BL - Plasma and Gas Discharge Physics
Institutional support	UFP-V - RVO:61389021
Annotation	Until recently, it was generally accepted that the profile of parallel heat flux density in the SOL of limited tokamak plasmas can be well approximated by a single exponential with decay length.This popular belief was emphatically shown to be erroneous in 2012, when IR measurements on the inner column of JET limiter discharges revealed the presence of a narrow heat flux channel adjacent to the last closed flux surface. This near-SOL decay occurs within ~few mm, much shorter than the main SOL decay length, and can raise the heat flux at the limiter apex a factor 1-4 above the value expected from a single,broad exponential.Alerted by this JET data, the ITER Organization (IO) initiated a multi-machine effort to examine this new physics, with the C-Mod, DIII-D, COMPASS and TCV tokamaks all finding the narrow heat flux channel in dedicated experiments.This paper will describe how these new data are helping to unravel the physics of the narrow feature and how they have provided a strong
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2015

Number of the records: 1