BEXCO - Room A(101/102)
[CRD137] Design of a SiPM-based RICH detector for HELIX
- Ian WISHER
- Ian WISHER (University of Chicago, USA)
The High Energy Light Isotope eXperiment (HELIX), is a new balloon-borne 1 Tesla magnet spectrometer designed to measure light isotopic abundances including 10Be and 9Be to above energies of ~3 GeV/n. This requires precise measurements of the rigidity and velocity of the detected particles, necessitating a multisystem detector with a magnet/particle tracker, and ring imaging Cherenkov (RICH) detector. RICH detectors have been used successfully in a number of particle physics experiments to accurately measure the velocity of charged particles. HELIX uses a proximity-focused RICH with an aerogel radiator above a 1m2 focal plane populated with Silicon Photomultipliers (SiPMs) and is designed to measure velocity to less than 0.1%. The energy range of interest, high altitude environment, and proximity to the magnet present a challenging environment for a RICH detector. We describe the characterization of the SiPMs, the design features of the RICH, and how they help reach the challenging performance goals.