Abstract

A charged-particle beam current monitor has been designed using a coaxial cable transmission line in a configuration similar to that employed in building toroidal-wound wide band impedance matching and balun transformers. Several sizes of the coax-wound monitors have been constructed and compared with units of similar ferrite core material and geometry that were wound with ordinary magnet wire. One of the transformers has been used by experimenters at the NAL Internal Tarqet area since August of 1972. In order to simplify electronic signal processing, only average circulating charge is measured. This is done by measuring the "zero"signal" base-line shift due to the natural L/R response of the transformer.

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