Title :
Design for low beam loss in accelerators for intense neutron source applications
Author :
Jameson, Robert A.
Author_Institution :
Accel. Technol. Div., Los Alamos Nat. Lab., NM, USA
Abstract :
Control of beam loss in intense ion linacs involves keeping beam spill below parts in 10-5-10-8/m by preventing total beam size from extending to the limiting apertures. Starting from good RMS design practices, new analysis of the machine architecture is described in terms of space-charge effects on the machine tune, free-energy constraint, and halo-producing mechanisms. It is shown that halos are produced by the time- (or position-) varying nature of common linac aspects (such as misalignment, mismatching, acceleration, and construction techniques) through collective core/single-particle interaction dynamics plus resonances
Keywords :
beam handling techniques; ion accelerators; linear accelerators; particle beam diagnostics; tuning; RMS design practices; accelerators; beam loss control; beam spill; collective core/single-particle interaction dynamics; free-energy constraint; halo-producing mechanisms; intense ion linacs; intense neutron source applications; limiting apertures; low beam loss; machine tune; space-charge effects; Acceleration; Apertures; Ion accelerators; Linear accelerators; Neutrons; Particle beams; Radioactive materials; Size control; Structural beams; Waste materials;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309834
