Recent developments in stochastic cooling

A comparison of developments in different machines using the stochastic cooling method is presented. Examples include planar pick-up and kicker structures at Fermilab using printed circuit techniques, a novel digital delay line for LEAR, experience with bunched beam cooling equipment in the SPS and the AAC improvement and performance. As an interesting component from TARN, the helical coupler for slow beams is discussed. Machines presently under construction and planning to use stochastic cooling are COSY at KFA Juelich for light ions and ESR at GSI for heavy ions. In order to reduce experimental cut and try bench work for high frequency pick-up and kicker construction, the development of appropriate computer codes for systematic design of such structures has started. As a future application, the possible stochastic cooling (AAC or PS) of lead ions at CERN for LHC is discussed. (author) 11 refs.; 2 figs