Hwang, J.-G.; Kuszynski, J.: First Prototype of a Coronagraph-based Halo Monitor for BERLinPro. In: Shane Koscielniak ... [Ed.] : IPAC2018 : Proceedings of the 9th International Particle Accelerator Conference, Vancouver, BC, CanadaJACoW, 2018. - ISBN 978-3-95450-184-7, p. WEPB03/434-437
http://accelconf.web.cern.ch/AccelConf/ibic2018/papers/wepa02.pdf
Open Access Version
Abstract:
Since particle losses by beam halo induced by space charge force and scattering of trapped ions are critical issues for superconducting-linac based high power machines such as bERLinPro, a halo monitor is demanded to monitor and control particle distribution at the level of 104 105 of the core intensity. A coronagraph-based halo monitor was adopted and the first prototype has been designed as a demonstrator system aimed at resolving a halo-core contrast in the 103 to 104 range. This monitor was tested at BESSY II with various operation modes such as Transverse Resonance Island Buckets (TRIBs) and Pulse-Picking by Resonant Excitation (PPRE). We show our design parameters, experimental criterion, and experimental results.