Measurements of Halo Generation in an Intense Proton Beam

Details Measurements of Halo Generation in an Intense Proton Beam Measurements of Halo Generation in an Intense Proton Beam

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.c6002c&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

An experiment has been carried out to measure halo generation associated with the transport of an intense proton beam through a linear transport channel. The LEDA RFQ was used to inject a 6.7 MeV 10-100 mA beam into a 52-quadrupole channel. Four matching quads at the input of this transport line were used to generate specific mismatch oscillations and the resulting beam profiles were measured at downstream locations over a wide dynamic range. The results of these experiments tend to support the significance of controlling mismatch oscillations in minimizing halo generation. However, there is also an irreducible halo which appears to originate from earlier elements of the LEDA injector chain. Initial attempts to simulate the experimental results show promising agreement between simulation and experiment when the low energy beam aberrations are included in the input distributions. Details of the experimental results and simulations will be described.

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