Session RP1 - Poster Session VIII.
POSTER session, Thursday afternoon, October 30
Fran Hill Southeast Exhibit Hall, ACC
A High Power Prototype (HPP) of the JET ITER-like ion cyclotron resonance heating (ICRH) antenna has been constructed and tested in a joint collaboration between Oak Ridge National Laboratory, Princeton Plasma Physics Laboratory, and EFDA-JET/UKAEA. The HPP consists of one quadrant of the full JET-EP ICRH antenna. Internal matching capacitors are utilized in a circuit that maintains a voltage standing wave ratio at the input < 1.5 over a factor of ten range in resistive loading. The HPP is being tested in vacuum at full capacitor design voltage and current for up to 10-s pulses. The HPP design and status of the test results will be reviewed. Measurements of the currents, voltages, input impedance, and temperatures will be discussed including low power measurements of the tuning range and sensitivity to capacitor position. Measurements will be compared to circuit analysis and modeling codes. The impact of HPP results on the design of the final JET ITER-like ICRH antenna will be discussed.