Mechanisms of beam-halo formation in high-intensity linacs

Journal Article · Fri Sep 15 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.49171· OSTI ID:21156103

Bohn, C L; Delayen, J R ^[1]

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1. Technology Development Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

An rms-mismatched beam with space-charge forces can evolve rapidly, and during the course of evolution its emittance grows and a diffuse halo forms. The halo is of particular concern for long-term operation of linacs such as those envisioned for accelerator transmutation of waste (ATW) because too much particle impingement on the accelerating structures would cause enough radioactivation to prohibit routine hands-on maintenance. Thus, halo suppression is a design consideration for these linacs. In this paper, we summarize both the physical processes associated with the rapid evolution of the rms-mismatched beam and a semianalytic formalism which was recently developed to account for them. We also provide representative results derived from the formalism.

• OSTI ID: 21156103
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 346; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATOR DRIVEN TRANSMUTATION
BEAM EMITTANCE
BEAM PRODUCTION
DESIGN
LINEAR ACCELERATORS
MAINTENANCE
OPERATION
RADIOACTIVATION
RADIOACTIVE WASTE PROCESSING
SPACE CHARGE