Abstract:We have developed a semi-empirical model predicting the equilibrium caesium coverage (in
monolayers) and the resulting work function of the ISIS Penning ion source cathode (in eV) in long
pulse operation. We use the caesium balance model to predict the temporal structure of the
extracted H- beam current pulses and compare the model predictions to experimental data with
60 mA, 2 ms beam pulses at 50 Hz. The experimentally
observed droop of the beam current is reproduced by the model. The results imply… Show more
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