Compensation for non-linear interaction between JET NBI deflection magnets for simultaneous D_2/T_2 beamline operation

摘要

Each Neutral Beam Injector at JET is capable of injecting around 10MW D~o or T~o from8 PINI ion sources through one port [1]. There are four Deflection Magnets (one per quadrant) spaced close together. A schematic drawing of a quadrant is shown in fig.1. Each magnet deflects the unneutralised ions from the beams onto a V- shaped Full Energy Ion Dump (FEID) and Fractional Ion Dumps (not shown). Thermocouples in the FEID monitor the power footprint.