Ion heat transport studies in JET
Artikel i vetenskaplig tidskrift, 2011
Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with (3)He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known omega(ExB) threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T(e)/T(i) and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.
shear
ratio
thermal transport
instabilities
confinement
t-e/t-i
turbulence simulations
h-mode plasmas
asdex upgrade
tokamaks
Författare
P. Mantica
Associazione EURATOM-ENEA sulla Fusione
EFDA-JET
C. Angioni
Max-Planck-Gesellschaft
EFDA-JET
B. Baiocchi
EFDA-JET
Associazione EURATOM-ENEA sulla Fusione
Universita' degli Studi di Milano
M. Baruzzo
EFDA-JET
Consorzio Rfx
M. N. A. Beurskens
Culham Lab
EFDA-JET
J. P. S. Bizarro
Instituto Superior Tecnico
EFDA-JET
R. V. Budny
EFDA-JET
Princeton University
P. Buratti
Associazione EURATOM-ENEA sulla Fusione
EFDA-JET
A. Casati
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
EFDA-JET
C. Challis
EFDA-JET
Culham Lab
J. Citrin
FOM Institute for Plasma Physics - Rijnhuizen
EFDA-JET
G. Colyer
Culham Lab
EFDA-JET
F. Crisanti
EFDA-JET
Associazione EURATOM-ENEA sulla Fusione
A. C. A. Figueiredo
EFDA-JET
Instituto Superior Tecnico
L. Frassinetti
EFDA-JET
EES
C. Giroud
EFDA-JET
Culham Lab
N. Hawkes
EFDA-JET
Culham Lab
J. Hobirk
EFDA-JET
Max-Planck-Gesellschaft
E. Joffrin
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
EFDA-JET
T. Johnson
EFDA-JET
EES
E. Lerche
Koninklijke Militaire School
EFDA-JET
P. Migliano
Universita' degli Studi di Milano-Bicocca
EFDA-JET
Associazione EURATOM-ENEA sulla Fusione
V. Naulin
Danmarks Tekniske Universitet (DTU)
EFDA-JET
A. G. Peeters
EFDA-JET
Universität Bayreuth
G. Rewoldt
EFDA-JET
Princeton University
F. Ryter
EFDA-JET
Max-Planck-Gesellschaft
A. Salmi
Aalto-Yliopisto
EFDA-JET
R. Sartori
Fusion for Energy Joint Undertaking
EFDA-JET
C. Sozzi
Associazione EURATOM-ENEA sulla Fusione
EFDA-JET
G. Staebler
EFDA-JET
General Atomics
D. Strintzi
Max-Planck-Gesellschaft
EFDA-JET
T. Tala
Teknologian Tutkimuskeskus (VTT)
EFDA-JET
M. Tsalas
FOM Institute for Plasma Physics - Rijnhuizen
EFDA-JET
D. Van Eester
EFDA-JET
Koninklijke Militaire School
T. Versloot
EFDA-JET
FOM Institute for Plasma Physics - Rijnhuizen
P. C. de Vries
FOM Institute for Plasma Physics - Rijnhuizen
EFDA-JET
Jan Weiland
Chalmers, Rymd- och geovetenskap, Transportteori
Plasma Physics and Controlled Fusion
0741-3335 (ISSN) 1361-6587 (eISSN)
Vol. 53 12Ämneskategorier
Fysik
DOI
10.1088/0741-3335/53/12/124033