MATCHING OF MAGNETIC FIELD WITH ENERGY OF ELECTRONS IN 2 MeV COSY COOLER

摘要

In the high energy electron cooler for COSY the beam energy range is wide (24keV- 2MeV). Maximal guiding magnetic fields are 0.5kG in accelerating tube, lkG in transport channels and 2kG in cooling solenoid and 45° toroids. As result we have two sections with longitudinal gradient of field, three 90° bends and 45° toroid before beam pass to solenoid. Transition of beam energy to transverse degrees of freedom is possible in such conditions. Chances to minimize this transition (named further "heating") are discussed. Also the results of using of correctors and pick-up system are considered.