Igloo: a neutral pion spectrometer for low energy photoproduction studies

A π0 spectrometer constructed from 68 lead glass Cherenkov counters has been installed on the tagged photon beam line at the Saskatchewan Accelerator Laboratory. It is being used for the investigation of neutral pion photoproduction from light nuclei within about 25 MeV of threshold. It can be configured for total cross section measurements with a large acceptance, or for angular distribution studies with a reduced acceptance.