Development of new μ–e decay counter in new multi-channel μSR spectrometer for intense pulsed muon beam

Abstract

Development of μ–e decay counter for the new multi-channel μSR spectrometer at the RIKEN-RAL muon facility is presented. For the new spectrometer with an intense pulsed muon beam, finely segmented counters and compact read-out system are essential in order to increase segments and to reduce pile-up signals. In addition, to suppress background particles, the counter has an angular resolution by discriminating the light output. Feasibility test of prototype counters with the positron beam and the muon beam are performed. Based on this test, a new counter design is discussed.