Beam-Halo Measurements in High-Current Proton Beams
نویسندگان
چکیده
منابع مشابه
Beam Halo in Proton Linac Beams
We review the present understanding of beam halo in proton linacs. Space-charge forces acting in mismatched beams have been identified as a major cause of beamhalo. We introduce a new description of the halo using the ratio of moments of the distribution of beam coordinates. We describe the beam-halo experiment that is in preparation at Los Alamos, which will address questions about the beam pr...
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An experimental effort has been undertaken to investigate the production of halo particles in a proton beam having significant space charge forces. The LEDA RFQ was used to inject a pulsed 6.7 MeV 1575 mA beam into a linear FODO channel. Four matching quads at the input of this 52-quadrupole transport line were used to generate specific mismatch oscillations, believed to be a key mechanism in t...
متن کاملHigh Current Proton Beam Operation at Gsi Unilac
A significant part of the experimental program at FAIR is dedicated to pbar physics requiring a high number of cooled pbars per hour [1]. The primary proton beam has to be provided by a 70 MeV proton linac followed by two synchrotrons. The new FAIR proton linac [2] will deliver a pulsed proton beam of up to 35 mA of 36 μs duration at a repetition rate of 4 Hz. The recent GSI heavy ion linac (UN...
متن کاملTechniques for Intense-Proton-Beam Profile Measurements
In a collaborative effort with industry and several national laboratories, the Accelerator Production of Tritium (APT) facility and the Spallation Neutron Source (SNS) linac are presently being designed and developed at Los Alamos National Laboratory (LANL). The APT facility is planned to accelerate a 100 mA H cw beam to 1.7 GeV and the SNS linac is planned to accelerate a 1 to 4 mA-average, H,...
متن کاملHalo Formation and Emittance Growth during Bunch Compression of High-current Heavy Ion Beams
A generation of halo particles and an emittance growth are investigated numerically for a highcurrent beam transport during a longitudinal bunch compression. The halo particles are generated during the drift compression with an alternating gradient confinement lattice in the transverse direction. The emittance growth is caused by the halo particle generation, and depends on the drift length for...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2002
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.89.214802