Fluence and dosimetric measurements for a π± irradiation facility

This paper briefly describes the pion irradiation facility used by the SIRAD (Silicon Radiation) Collaboration in mid-1994 at the Paul Scherrer Institute (PSI) in Villigen, Switzerland, and reports the fluence measurements carried out with the Al activation technique during silicon detector irradiations. Calibration factors were determined as a ratio between the fluence and the number of counts from an ionization chamber. Some dosimetric measurements were also performed using alanine and thermoluminescent dosimeters, which allowed the π and the γ dose rates to be determined. 115 In activation was also used to determine the neutron contamination around the π -beam.