On the role of different phasings of the ICRF antennas in optimized shear discharges in JET
2000 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 40, no 10, 1773-1789 p.Article in journal (Refereed) Published
In discharges with internal transport barriers produced by combined NBI and ICRF heating using the hydrogen minority scheme in JET, confinement and fusion performance are strongly affected by the direction of propagation of the ICRF waves. When the waves propagate along the plasma current, the formation of an internal transport barrier is prompter and the neutron yield is up to a factor of two higher than that for propagation against the current. An ICRF induced pinch of resonating trapped ions is put forward as a candidate for explaining the observations. Simulation results are presented which show that this effect is strong enough to provide a credible explanation for the experimental results.
Place, publisher, year, edition, pages
2000. Vol. 40, no 10, 1773-1789 p.
cyclotron current drive, high-performance, tokamak plasmas, ion, waves, transport, frequencies, range, dd
IdentifiersURN: urn:nbn:se:kth:diva-20085DOI: 10.1088/0029-5515/40/10/308ISI: 000089761000008OAI: oai:DiVA.org:kth-20085DiVA: diva2:338778
QC 201005252010-08-102010-08-10Bibliographically approved