A high-precision Ferrite-induction beam-current monitoring system

Abstract The construction and performance of a Ferrite-induction current monitoring system for charged-particle beams with pulse lengths less than 3 μs and pulse repetition rates up to 1 kHz is described. An absolute accuracy of better than 0.2% has been achieved for average currents between 0.01 and 30 μA and a pulse repetition rate of 100 Hz. Particular emphasis has been placed on a detailed analysis of the design parameters, which limit the ultimate accuracy of the current monitoring system.