Physics of high power ICRH on JET
Ion Cyclotron Resonance Heating (ICRH) experiments have been carried out in a wide range of JET plasmas. A high confinement region in the plasma core has been discovered during on-axis heating of pellet fuelled discharges. Sawtooth-free periods and improved heating efficiency have been achieved in high current plasmas by heating during the current rise. Combined ICRH and neutral beam injection (NBI) in double null X-point plasmas has yielded D-D fusion rates up to 2x1.0E16/s and electron and ion temperatures of 11keV and 17keV respectively. Non-thermal fusion reaction rates from (He(3))D minority ICRH have been reproduced by a model which predicts Q about 0.7 for (D)T minority ICRH in JET. RF modulation studies have yielded power deposition profiles and heat transport coefficients inside the q=1 surface. Alignment of the antenna screen to the magnetic field minimises nickel impurity release.
Bibliographic Reference: Report: JET-P(89)32 EN (1989)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199010650 / Last updated on: 1994-12-01
Original language: en
Available languages: en