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Suppression of beam halo in an RF linac using a hollow electron beam

Published online by Cambridge University Press:  14 March 2019

B. Nayak  and
S. Krishnagopal
B. Nayak*
Affiliation:
Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India Homi Bhabha National Institute, Mumbai 400094, India
S. Krishnagopal
Affiliation:
Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India Homi Bhabha National Institute, Mumbai 400094, India
*
Author for correspondence: B. Nayak, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India and Homi Bhabha National Institute, Mumbai 400094, India, E-mail: nayakb@barc.gov.in
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Abstract

High-intensity electron linacs have severe space-charge effects that lead to the production of beam halo which degrade the beam quality. For a given charge per bunch, hollow beams have a weaker nonlinear space-charge force. In this paper, we have investigated the possibility of using hollow beam to control halo growth in linacs. We simulate the dynamics of such a beam in a 17 MeV radio frequency linac using ASTRA beam dynamics code and show that it experiences a smaller emittance growth as well as reduced beam halo. The results suggest that using a hollow beam, high charge per bunch could be propagated and accelerated in a radio frequency linac.

Keywords

Beam haloRF linacsolenoid
Type
Research Article
Information
Laser and Particle Beams , Volume 37 , Issue 1 , March 2019 , pp. 38 - 48
Copyright
Copyright © Cambridge University Press 2019 

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