Power and power density diagnostics for the JET neutral injection beam lines
The JET injectors deliver 10 MW of Deuterium atoms for up to 10 s, produced from eight 80 kV 41 A ion beams. An upgrade will operate with 140kV 30 A, also in Deuterium. The width of the injector port requires beam scraping and steering. The generated peak power densities can exceed 10 kW/cm2. This has implications for the power and power density diagnostics. It is shown that the measurements rely on Inertial and Water Calorimetry. Fast rise analysis from thermcouples in the beam absorbing panels was intended as an ideal combination between power absorption and diagnostics. The results with brazed thermocouples have been disappointing. The recently used percussion welding techniques leads to better results.
Bibliographic Reference: Report: JET-P(88)54 EN (1988)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 198910456 / Last updated on: 1994-12-01
Original language: en
Available languages: en