Phys. Rev. ST Accel. Beams 10, 104201 (2007) [7 pages]Criteria for emittance compensation in high-brightness photoinjectors |
Chun-xi Wang * and Kwang-Je Kim
Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
Massimo Ferrario
INFN-Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044 Frascati, Italy
An Wang †
University of Science and Technology of China, Hefei, China
Received 2 July 2007; published 3 October 2007
A critical process in high-brightness photoinjectors is emittance compensation, which brings under control the correlated transverse emittance growth due to the linear space-charge force. Although emittance compensation has been used and studied for almost two decades, the exact criteria to achieve emittance compensation is not as clear as it should be. In this paper, a perturbative analysis of slice envelopes and emittance evolution close to any reference envelope is developed, via which space-charge and chromatic effects are investigated. A new criterion for emittance compensation is found, which is complementary to the well-known matching condition for the invariant envelope and agrees very well with simulations.
©2007 The American Physical Society
URL: http://link.aps.org/abstract/PRSTAB/v10/e104201
DOI: 10.1103/PhysRevSTAB.10.104201
PACS: 29.27.Bd, 41.75.−i, 41.85.−p, 29.25.Bx
* wangcx@aps.anl.gov; http://www.aps.anl.gov/~wangcx
† Visiting student of Argonne National Laboratory.
[ Abstract | Previous article | Next article | Issue 10 ]
APS | Journals | Contact Information | Phys. Rev. ST - Accel. Beams | Join APS | Feedback
ISSN 1098-4402 © 2008 by The American Physical Society All rights reserved. Physical Review Special Topics - Accelerators and Beams™ is a trademark of The American Physical Society. Use of APS online journals implies that the user has read and agrees to the Terms and Conditions in the Subscription Agreement .