Considerations in using third order focusing of proton beams for uniform irradiation of extended targets
The latest target designs for the National Spallation Neutron Source (NSNS) and Accelerator Production of Tritium (APT), require that the geometrical target cross-section (normal to the proton beam direction) be of rectangular shape with dimensions (10 cm x 30 cm) and (16 cm x 160 cm) for the NSNS and APT targets, respectively. These targets are to be irradiated with high-intensity proton beams. At present, plans are to use beam-expanded uniform intensities for the APT target, with possibly a small horizontal and vertical jitter superimposed. Although current plans for the NSNS target call for non expanded gaussian distributions, the authors nevertheless investigate the application of a beam expander to provide beam on that target. The high aspect ratios, 3:1 and 1:10, currently proposed for the NSNS and APT targets prompt a feasibility study for the creation of uniform beams over such targets. This paper presents a beam-optics design of two proposed beam expanders which will generate a beam to irradiate uniformly the NSNS and APT targets. Both beam optics designs are representative only, and independent of any other official designs that may exist within the design groups of the APT or NSNS project. Recent experimental work on uniform beam profiles on the target of the Brookhaven Isotope Resource Center (BIRC) of the BNL-200 MeV-LINAC will also be presented.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 555560
- Report Number(s):
- BNL-64957; CONF-971125-; ON: DE98001632; BR: DP0404012; TRN: 98:008972
- Resource Relation:
- Conference: 1997 American Nuclear Society (ANS) winter meeting, Albuquerque, NM (United States), 16-20 Nov 1997; Other Information: PBD: [1997]
- Country of Publication:
- United States
- Language:
- English
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