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Description
LEETCHI is an electron source designed to produce 140 keV, 5 A, 140 μs beams at a repetition rate of 50 Hz. The shot to shot and flat top current stability of this drive beam injector for CLIC has to be better than 0.1 % and a normalized emittance of 14 mm.mrad is expected. A test stand has been build which allows to diagnose and dump the beam produced by a thermionic cathode. The thermionic cathode is equipped with a grid which will allow us to control the current and eventually to have a feedback on the flattop shape.
Results with few µs pulses lengths are presented. The analysis shows a very good stability of the LEETCHI experiment.
OTR measurements with short pulses are compared with Particle In Cells and tracking simulations. These comparisons are used to estimate the emittance of the beam.
First results at 5 Amperes, 140 µs pulse duration and low repetition rate, show the capability of this gridded cathode to resist to the thermal constrains.
