Abstract
Abstract The possibility of an RF-resonance polarimeter (RFP) for fast non-destructive measurement of beam polarization in an accelerator ring is considered. In order to accumulate the transition radiation from the free oscillating coherent spin of the beam, a passive superconducting cavity is proposed. The increase of effective voltage in the cavity with time (related to beam polarization) is calculated here. The efficiency of the polarimeter does not decrease with beam energy and is proportional to the average beam current. A possible scheme of measurement of the accumulated voltage is presented. The noise limitations are taken into account and evaluated. Siberian snakes can be used in order to provide a sufficiently small value for the spin tune spread. Numerical examples are given.
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