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.

tokamaks

asdex upgrade

shear

instabilities

h-mode plasmas

ratio

turbulence simulations

t-e/t-i

thermal transport

confinement

Författare

P. Mantica

EFDA-JET

Associazione EURATOM-ENEA sulla Fusione

C. Angioni

Max Planck-institutet

EFDA-JET

B. Baiocchi

Associazione EURATOM-ENEA sulla Fusione

Universita degli Studi di Milano

EFDA-JET

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

Princeton Plasma Physics Laboratory

EFDA-JET

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

Culham Lab

EFDA-JET

J. Citrin

FOM Institute for Plasma Physics - Rijnhuizen

EFDA-JET

G. Colyer

Culham Lab

EFDA-JET

F. Crisanti

Associazione EURATOM-ENEA sulla Fusione

EFDA-JET

A. C. A. Figueiredo

Instituto Superior Tecnico

EFDA-JET

L. Frassinetti

EES

EFDA-JET

C. Giroud

Culham Lab

EFDA-JET

N. Hawkes

EFDA-JET

Culham Lab

J. Hobirk

EFDA-JET

Max Planck-institutet

E. Joffrin

EFDA-JET

Le Commissariat à l’énergie atomique et aux énergies alternatives (CEA)

T. Johnson

EFDA-JET

EES

E. Lerche

Koninklijke Militaire School - Ecole Royale Militaire

EFDA-JET

P. Migliano

Universita' degli Studi di Milano-Bicocca

Associazione EURATOM-ENEA sulla Fusione

EFDA-JET

V. Naulin

EFDA-JET

Danmarks Tekniske Universitet (DTU)

A. G. Peeters

Universitat Bayreuth

EFDA-JET

G. Rewoldt

Princeton Plasma Physics Laboratory

EFDA-JET

F. Ryter

Max Planck-institutet

EFDA-JET

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

EFDA-JET

Max Planck-institutet

T. Tala

EFDA-JET

VTT Technical Research Centre of Finland

M. Tsalas

FOM Institute for Plasma Physics - Rijnhuizen

EFDA-JET

D. Van Eester

Koninklijke Militaire School - Ecole Royale Militaire

EFDA-JET

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

Ämneskategorier

Fysik

DOI

10.1088/0741-3335/53/12/124033