Anomalous Schottky Signals from a Laser-Cooled Ion Beam
Longitudinal Schottky signals froma laser-cooled, spatially dense, ionbeam have been studied inthe ASTRID storage ring. Thefluctuation signals are distortedby the effects of space charge, asis observed in electron cooling experiments.However,the spectra also exhibit previously unobservedcoherent components. The ions' velocity distribution, measured by alaser fluorescence technique, suggests that t