TY - JOUR
T1 - Reduction of divertor heat load in JET ELMy H-modes using impurity seeding techniques
JF - Nuclear Fusion
Y1 - 2004
A1 - Rapp, J.
A1 - Monier-Garbet, P.
A1 - Matthews, G. F.
A1 - Sartori, R.
A1 - Andrew, P.
A1 - Dumortier, P.
A1 - Eich, T.
A1 - Fundamenski, W.
A1 - von Hellermann, M.
A1 - Hogan, J.
A1 - Ingesson, L. C.
A1 - Jachmich, S.
A1 - Koslowski, H. R.
A1 - Loarte, A.
A1 - Maddison, G.
A1 - McDonald, D. C.
A1 - Messiaen, A.
A1 - Ongena, J.
A1 - Parail, V.
A1 - Philipps, V.
A1 - Saibene, G.
A1 - Unterberg, B.
VL - 44
SN - 0029-5515
UR - ://000189318100013
U1 - Fusion Physics
U2 - Instrumentation development
U5 - 062690516cde767fb845b314aedde5ea
ER -
TY - JOUR
T1 - Radiation pattern and impurity transport in argon seeded ELMy H-mode discharges in JET
JF - Plasma Physics and Controlled Fusion
Y1 - 2002
A1 - M. E. Puiatti
A1 - Mattioli, M.
A1 - Telesca, G.
A1 - Valisa, M.
A1 - Coffey, I.
A1 - Dumortier, P.
A1 - Giroud, C.
A1 - Ingesson, L. C.
A1 - Lawson, K. D.
A1 - Maddison, G.
A1 - Messiaen, A. M.
A1 - Monier-Garbet, P.
A1 - Murari, A.
A1 - M F F Nave
A1 - Ongena, J.
A1 - Rapp, J.
A1 - Strachan, J.
A1 - Unterberg, B.
A1 - von Hellermann, M.
VL - 44
SN - 0741-3335
UR - ://000178415900006
U1 - Fusion Physics
U2 - Instrumentation development
U5 - b7de26cb1ddd1d27983717104d80d676
ER -
TY - JOUR
T1 - Recent Results on Ion-Cyclotron and Combined Heating of Textor
JF - Fusion Engineering and Design
Y1 - 1995
A1 - Koch, R.
A1 - Messiaen, A. M.
A1 - Ongena, J.
A1 - Vannieuwenhove, R.
A1 - Van Oost, G.
A1 - van Wassenhove, G.
A1 - Dumortier, P.
A1 - Durodie, F.
A1 - Vandenplas, P. E.
A1 - Vanesteer, D.
A1 - Vervier, M.
A1 - Weynants, R. R.
A1 - Finken, K.H.
A1 - Euringer, H.
A1 - Philipps, V.
A1 - Samm, U.
A1 - Unterberg, B.
A1 - Winter, J.
A1 - Bertschinger, G.
A1 - Esser, H. G.
A1 - Fuchs, G.
A1 - Giesen, B.
A1 - Hintz, E.
A1 - Hoenen, F.
A1 - Hutteman, P.
A1 - Konen, L.
A1 - Korten, M.
A1 - Koslowski, H. R.
A1 - KramerFlecken, A.
A1 - Lochter, M.
A1 - Mank, G.
A1 - Pospieszczyk, A.
A1 - Schweer, B.
A1 - Soltwisch, H.
A1 - Telesca, G.
A1 - Uhlemann, R.
A1 - Waidmann, G.
A1 - Wolf, G. H.
A1 - Boedo, J.
A1 - Gray, D.
A1 - Hillis, D. L.
A1 - Oyevaar, T.
A1 - Tammen, H. F.
A1 - Tanabe, T.
A1 - Ueda, Y.
AB - The recent experimental activity in the field of auxiliary heating and related topics on TEXTOR is reviewed. TEXTOR is equipped with up to 4 MW of ion cyclotron heating power and 3.4 MW of neutral beam injection. The combination of the radiating boundary concept with high auxiliary power has extended the improved confinement domain to the large density regime and demonstrated the viability of the radiating boundary concept for long pulse high power operation. Improved confinement was also achieved in third harmonic heating, characterised by predominant coupling of the RF to the beam ions. Operation of an unshielded antenna with insulated limiters proved that RF sheaths are taking place on the side limiters and are suppressed by insulation. Control of the helium flux by the RF was successfully demonstrated using the interaction of the RF with fast He-3 ions injected by neutral beam. Preliminary tests with a high Z limiter indicate compatibility, and even a positive effect, of the RF. Experience gained in operating unshielded antennas is also commented on.
VL - 26
SN - 0920-3796
U5 - 450239f862a46538964cd016ce30beba
ER -
TY - JOUR
T1 - Review of Recent Advances in Heating and Current Drive on Textor
JF - Plasma Physics and Controlled Fusion
Y1 - 1993
A1 - Messiaen, A. M.
A1 - Van Eester, D.
A1 - Koch, R.
A1 - Ongena, J.
A1 - van Wassenhove, G.
A1 - Weynants, R. R.
A1 - Borgermans, P.
A1 - Conrads, H.
A1 - Dumortier, P.
A1 - Durodie, F.
A1 - Fuchs, G.
A1 - Euringer, H.
A1 - Giesen, B.
A1 - Hillis, D.
A1 - Hoenen, F.
A1 - Koslowski, H. R.
A1 - KramerFlecken, A.
A1 - Lochter, M.
A1 - Oyevaar, T.
A1 - Soltwisch, H.
A1 - Tammen, H. F.
A1 - Telesca, G.
A1 - Uhlemann, R.
A1 - van den Durpel, L.
A1 - Vandenplas, P. E.
A1 - Soltwisch, H.
A1 - Tammen, H. F.
A1 - Telesca, G.
A1 - Uhlemann, R.
A1 - van den Durpel, L.
A1 - Vandenplas, P. E.
A1 - Vannieuwenhove, R.
A1 - Van Oost, G.
A1 - Vervier, M.
A1 - Waidmann, G.
AB - Co-injection (DO --> D+) applied to TEXTOR leads to a hot ion node regime with enhanced confinement. A synergistic increase of the beam effects is observed with the addition of ICRH at omega = 2omega(cD) = omega(cH) (H minority heating scenario) resulting, beside other reviewed effects, in a significant increase of the ion temperature and of the beam driven current (respectively larger than 30 % and 50 % for the addition of an RF power comparable to the NBI one). The large ion heating efficiency of ICRH also remains when ICRH is added to balanced injection and the hot ion mode regime remains up to the maximum achieved beta (=2/3 of the Troyan limit with more than 6MW of auxiliary heating). ICRH also leads to the formation of a more 'isotropic' tail. These results are interpreted with the help of a Fokker-Planck code which computes the beam distribution function in presence of RF and of TRANSP simulations. The amount of RF absorption by the H minority by the ion beam and die bulk plasma is theoretically evaluated. It is shown that a large part of the synergistic effects can be explained by the rise of the electron temperature due to the minority heating which increases the beam slowing down time and its critical energy. A smaller contribution to the effects is due to direct coupling of the RF power to the beam (less than 10 % of the total RF absorbed power) and to the decrease of the plasma toroidal rotation induced by the RF. ICRH has also been added to co-injection at omega = 3omega(CD). In this case no minority heating is present and the RF energy coupling to the beam is one of the dominant effects. It leads to the formation of a very energetic tail of the ion beam with a strong increase of the beam-target neutron reactivity.
VL - 35
SN - 0741-3335
U5 - 776e534e7dc4a86e8d5264ae11eecc6d
ER -