Title :
Experimental study of proton-beam halo induced by beam mismatch in LEDA
Author :
Wangler, T.P. ; Allen, C.K. ; Chan, K.C.D. ; Colestock, P.L. ; Crandall, K.R. ; Garnett, R.W. ; Gilpatrick, D. ; Lysenko, W. ; Qiang, J. ; Schnieder, J.D. ; Schulze, M.E. ; Sheffield, R.L. ; Smith, H.V.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
We report measurements of transverse beam halo in mismatched proton beams in a 52-quadrupole FODO transport channel following the 6.7-MeV LEDA RFQ. Beam profiles in both transverse planes are measured using beam-profile diagnostic devices that consist of a movable carbon filament for measurement of the dense beam core, and scraper plates for the halo measurement. The gradients of the first four quadrupoles can be independently adjusted to mismatch the RFQ output beam into the beam-transport channel
Keywords :
accelerator RF systems; accelerator cavities; accelerator magnets; beam handling equipment; carbon; electromagnets; high energy physics instrumentation computing; particle beam diagnostics; particle beam extraction; particle beam focusing; particle beam stability; proton accelerators; proton beams; 6.7 MeV; C; FODO transport channel; IMPACT code; LEDA RFQ; Low-Energy Demonstration Accelerator; beam mismatch; beam profiles; beam-profile diagnostic devices; coherent oscillations; dense beam core; focusing force; movable carbon filament; output beam; proton beam halo; quadrupole gradients; radiofrequency quadrupole; scraper plates; space-charge forces; transverse beam halo; Atomic beams; Atomic measurements; Energy measurement; Iron; Laboratories; Particle beams; Protons; Thickness measurement; US Department of Energy; Wire;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987956
