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On the Multiturn Injection of High-Power Beams into an Accumulator Ring

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1 Author(s)
Philip F. Meads ; 7053 Shirley Drive Oakland, California 94611

The usual methods of multiturn injection result in substantial loss which is not acceptable with a high-Power beam. A method first proposed in 1973 [1] is here improved and applied to both the injection of protons and charge-exchange injection. Changes with respect to the original method avoid tunes close to an integer resonance and provide for the necessary tune shift through space-charge forces and nonlinearities in either the pulsed equilibrium-orbit-bump magnets or in fixed octupole magnets. When applied to charge-exchange injection, the method drastically reduces heating and damage to the stripper while providing systematically for the dilution of transverse phase space that is necessary for the intended application--that of injection of 660 turns of a 1.1 GeV, 100 mA beam.

Published in:

IEEE Transactions on Nuclear Science  (Volume:28 ,  Issue: 3 )