Operational aspects of electron cooling at the low energy antiproton ring (LEAR)

The major modifications made to the LEAR (Low Energy Antiproton Ring) electron cooler for its reliable and effective use in everyday operations are described. The transverse feedback system used to counteract the coherent instabilities observed with the dense beams obtained with electron cooling is also discussed. Experience gained while using the cooler in a semi-operational manner has made it possible to redesign the critical components. Supplemented by the active feedback system, electron cooling can now be used consistently between decelerating ramps to obtain beams of ultralow momenta with an appreciable gain in duty cycle and beam quality as compared to previous modes of operation.<
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