Ames, Oakes Nov. 16, 1923 [to C.H. Lankester]

Abstract

A compact cavity for acceleration has been developed with cobalt-based amorphous cores. This core has high permeability that enables the cavity length to be madeshort, and its low Q-value of about 0.5 permits an RF system without tuning control of the cavity. In the frequency range from 0.4 to 8 MHz, an accelerationvoltage of more than 4 kV can be obtained with a total input RF power of 8 kW. In this paper the structure of the cavity, the obtained core impedance, and theirperformances under high-power test are presented