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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Space-charge dominated beams can induce chaotic behavior on particle trajectories leading to halo formation on the beam spot. This causes particle losses along the beam transportation that must be minimized. The fractional losses must be kept below 10/m. This is a very low threshold to check with standard multiparticle codes. To study this kind of problems a new particle simulation approach wil...
متن کاملBeam-beam interaction effects for separated beams in a proton-antiproton collider
An investigation of the beam-beam interaction as a function of transverse separation of colliding proton and antiproton bunches is presented. A mathematical model describing resonant excitation of separated beams is examined. Beam-beam experiments in the Fermilab collider measure beam-beam resonant excitation ~particle losses! at different transverse beam separations in the storage ring. The ex...
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STAR collected data in proton-proton collisions at √ s = 200 GeV with transverse and longitudinal beam polarizations during the 2003 running period at RHIC. We present preliminary results on single transverse spin asymmetries AN in the production of forward charged hadrons detected with the Beam-Beam Counters (BBC). The asymmetries AN measured at pseudorapidities 3.9 < |η| < 5.0 are found to be...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 2004
ISSN: 0168-9002
DOI: 10.1016/j.nima.2003.11.182