Comparison of SOI Microdosimeter and Tissue Equivalent Proportional Counter measurements at the CERF facility

The CERN-EU High Energy Reference Field (CERF) facility is used in the calibration of neutron dosimeters for aviation and high energy physics applications. A comparison of the facility's microdosimetric spectra obtained with a new Silicon on Insulator (SOI) Microdosimeter and a HAWK Tissue Equivalent Proportional Counter (TEPC) are presented. Experimental measurements with a silicon PIN dosimeter diode are also described which indicate a small but significant contribution from charged particles to dosimetry measurements within the neutron dominated field.