Speaker
Description
For high power ion accelerators such as the machine at the heart of the Los Alamos Neutron Science Center (LANSCE), beam “tails” and “halo” can pose significant problems. Such small fractions of the beam current are easy to lose and difficult to measure, yet can contain enough charge to generate significant radiation; thus, halo and tails can pose a direct threat to instrumentation through radiation, and impact maintenance due to activation. At LANSCE, we have nearly completed installation of a laser-neutralization based bunch length diagnostic. When complete, we will use a ~1 ps pulse length laser to strip to H- secondary electron. We will slew the phase of the laser with respect to the H- bunch to measure the bunch temporal profile. Currently, we can characterize background signals in the beam tunnel and test operation and timing for all components except the laser. We present an installation update and initial findings.
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