Phys. Rev. Lett. 89, 214802 (2002) [4 pages]Beam-Halo Measurements in High-Current Proton BeamsReceived 25 July 2002; published 4 November 2002 We present results from an experimental study of the beam halo in a high-current 6.7-MeV proton beam propagating through a 52-quadrupole periodic-focusing channel. The gradients of the first four quadrupoles were independently adjusted to match or mismatch the injected beam. Emittances and beamwidths were obtained from measured profiles for comparisons with maximum emittance-growth predictions of a free-energy model and maximum halo-amplitude predictions of a particle-core model. The experimental results support both models and the present theoretical picture of halo formation. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.214802
DOI:
10.1103/PhysRevLett.89.214802
PACS:
29.17.+w, 29.27.Bd, 41.75.–i, 41.85.Ew
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.