More uniform illumination of laterally extended targets by accelerator beams

Conference · Fri Jan 01 04:00:00 EST 1993 · Transactions of the American Nuclear Society; (United States)

OSTI ID:6908411

Tsoupas, N; Zucker, M S ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

Many applications of accelerator beams require target irradiation that is uniform (within some specification) for an area extending laterally with respect to the incident beam axis. The accelerator production of tritium (APT) project, for example, requires that the spallation-induced lithium conversion (SILC) target have a reasonably uniform deposition of beam power over a 1.4- x 1.4-m area, although the Gaussian intensity-profile beam exiting from the APT linac has a full-width at half-maximum of only millimetres. Until recently, the only techniques for uniformly illuminating a laterally extended target were interposition of a thick absorber before the target or repetitive sweeping of the beam ([open quotes]rastering[close quotes]). Each is seriously flawed, the first in being wasteful of beam and of accelerator power and creating radioactivity, the second in the deflection magnet power required, that time-dependent phenomena may require simultaneous irradiation of the whole target, and a raster system failure could allow focused beam to impact the target.

• OSTI ID: 6908411
• Report Number(s): CONF-931160--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 69
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
663000 -- Nuclear Physics-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BEAM PRODUCTION
BEAMS
ILLUMINANCE
NEUTRON BEAMS
NUCLEAR REACTIONS
NUCLEON BEAMS
PARTICLE BEAMS
SPALLATION
TARGETS