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The control of convection by fuelling and pumping in the JET pumped divertor

Abstract

Convection from the scrape-off layer (SOL) to the divertor will control core impurities, if it retains them in a cold, dense, divertor plasma. This implies a high impurity concentration in the divertor, low at its entrance. Particle flux into the divertor entrance can be varied systematically in JET, using the new fuelling and pumping systems. The convection ratio has been estimated for various conditions of operation. Particle convection into the divertor should increase thermal convection, decreasing thermal conduction, and temperature and density gradients along the magnetic field, hence increasing the frictional force and decreasing the thermal force on impurities. Changes in convection in the SOL, caused by gaseous fuelling, have been studied, both experimentally in the JET Mk I divertor and with EDGE2/NIMBUS. 1 ref., 4 figs., 1 tab.
Publication Date:
Jul 01, 1994
Product Type:
Conference
Report Number:
JET-P-94-29; CONF-9406270-
Reference Number:
SCA: 700330; PA: AIX-28:032672; EDB-97:058909; SN: 97001766257
Resource Relation:
Conference: 21. EPS conference on controlled fusion and plasma physics, Montpellier (France), 27 Jun - 1 Jul 1994; Other Information: PBD: Jul 1994; Related Information: Is Part Of Controlled fusion and plasma physics; PB: 240 p.
Subject:
70 PLASMA PHYSICS AND FUSION; CONVECTION; PLASMA SCRAPE-OFF LAYER; GAS INJECTION; CHARGED-PARTICLE TRANSPORT; DIVERTORS; E CODES; EDGE LOCALIZED MODES; JET TOKAMAK; MAGNETIC FIELD CONFIGURATIONS; N CODES; PLASMA IMPURITIES; PLASMA SIMULATION
OSTI ID:
456186
Research Organizations:
Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE97621358; TRN: FR9701783032672
Availability:
INIS; OSTI as DE97621358
Submitting Site:
FRN
Size:
pp. 193-198
Announcement Date:

Citation Formats

Harbour, P J, Andrew, P, Campbell, D, Clement, S, Davies, S, Ehrenberg, J, Erents, S K, Gondhalekar, A, Gadeberg, M, Gottardi, N, Von Hellermann, M, Horton, L, Loarte, A, Lowry, C, Maggi, C, McCormick, K, O`Brien, D, Reichle, R, Saibene, G, Simonini, R, Spence, J, Stamp, M, Stork, D, Taroni, A, and Vlases, G. The control of convection by fuelling and pumping in the JET pumped divertor. France: N. p., 1994. Web.
Harbour, P J, Andrew, P, Campbell, D, Clement, S, Davies, S, Ehrenberg, J, Erents, S K, Gondhalekar, A, Gadeberg, M, Gottardi, N, Von Hellermann, M, Horton, L, Loarte, A, Lowry, C, Maggi, C, McCormick, K, O`Brien, D, Reichle, R, Saibene, G, Simonini, R, Spence, J, Stamp, M, Stork, D, Taroni, A, & Vlases, G. The control of convection by fuelling and pumping in the JET pumped divertor. France.
Harbour, P J, Andrew, P, Campbell, D, Clement, S, Davies, S, Ehrenberg, J, Erents, S K, Gondhalekar, A, Gadeberg, M, Gottardi, N, Von Hellermann, M, Horton, L, Loarte, A, Lowry, C, Maggi, C, McCormick, K, O`Brien, D, Reichle, R, Saibene, G, Simonini, R, Spence, J, Stamp, M, Stork, D, Taroni, A, and Vlases, G. 1994. "The control of convection by fuelling and pumping in the JET pumped divertor." France.
@misc{etde_456186,
title = {The control of convection by fuelling and pumping in the JET pumped divertor}
author = {Harbour, P J, Andrew, P, Campbell, D, Clement, S, Davies, S, Ehrenberg, J, Erents, S K, Gondhalekar, A, Gadeberg, M, Gottardi, N, Von Hellermann, M, Horton, L, Loarte, A, Lowry, C, Maggi, C, McCormick, K, O`Brien, D, Reichle, R, Saibene, G, Simonini, R, Spence, J, Stamp, M, Stork, D, Taroni, A, and Vlases, G}
abstractNote = {Convection from the scrape-off layer (SOL) to the divertor will control core impurities, if it retains them in a cold, dense, divertor plasma. This implies a high impurity concentration in the divertor, low at its entrance. Particle flux into the divertor entrance can be varied systematically in JET, using the new fuelling and pumping systems. The convection ratio has been estimated for various conditions of operation. Particle convection into the divertor should increase thermal convection, decreasing thermal conduction, and temperature and density gradients along the magnetic field, hence increasing the frictional force and decreasing the thermal force on impurities. Changes in convection in the SOL, caused by gaseous fuelling, have been studied, both experimentally in the JET Mk I divertor and with EDGE2/NIMBUS. 1 ref., 4 figs., 1 tab.}
place = {France}
year = {1994}
month = {Jul}
}