| Paper |
Title |
Page |
| MOP055 |
Transport of LANSCE-Linac Beam to Proposed Materials Test Station
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171 |
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- B. Blind, K. F. Johnson, L. Rybarcyk
LANL, Los Alamos, New Mexico
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Refurbishment of Experimental Area A and installation of a Materials Test Station is planned at the Los Alamos Neutron Science Center (LANSCE). This paper describes the beamline to transport 800-MeV protons from the accelerator to Area A. The beamline has the minimum number of quadrupoles necessary to achieve the desired instantaneous beam parameters at the target, the appropriate beam-centroid excursions at the split target for painting the two target halves, and a beam-centroid crossover upstream of the target to facilitate shielding of upstream components from backstreaming neutrons. Options in the composition of the raster-magnet section represent trade-offs between the number of magnets and the severity of the effects of magnet failures. Beam diagnostics are an integral part of the beamline design. Instantaneous and painted beam sizes at the target can be inferred by observing the beam at properly chosen upstream locations. A beamline spur to a tune-up beam dump is planned.
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| TUP037 |
Possible Upgrade Paths for the LANSCE H- Injector
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330 |
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- L. Rybarcyk
LANL, Los Alamos, New Mexico
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The LANSCE linac presently provides both H- and H+ beams to several user facilities. The H- injector uses a cesiated, multi-cusp field, surface converter source operating at duty factors between 10 and 12%, coupled to a Cockcroft-Walton (CW) accelerator to provide peak beam currents of ~15 mA for the LANSCE linac. In an effort to raise the peak beam current available to the majority of the H- users, we are pursuing two options. The first is a low duty factor H- ion source and a 750 keV RFQ that would provide ~25 mA of peak current for use by the Lujan and pRad programs. The second is a low frequency buncher for the existing 80 keV beam transport located inside the CW dome that could provide about a factor of two increase in the peak beam current for the WNR program. This paper will present these two options.
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