Speaker
Description
A radio-frequency quadrupole (RFQ) was designed at 201.25 MHz for accelerating a proton (H+) beam and negative hydrogen ion (H–) beams from 65 keV to 2.1 MeV, for the LANSCE Accelerator Modernization Project (LAMP). The RFQ operates with a wide range of beam currents, from sub-mA currents for beamline tuning to 55 mA when producing high-charge bunches. To support a variety of experimental areas, the RFQ produces these beams with distinct timing patterns. In particular, the WNR facility requires one short-pulse H– bunch every 1.8 μs, calling for a unique operating mode of the RFQ for producing a ∼50-ns beam pulse, which is subsequently chopped in the medium-energy beam transport (MEBT) to retain only one single 201.25-MHz bunch. To accommodate the diverse operating modes while maintaining optimized beam quality and meeting the performance requirements of the project, the LAMP beamline also incorporates a dual-mode H– ion source, low-energy beam transport (LEBT) with multi-chopper beam control, and a specially designed MEBT.
| Working group | WG5 |
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