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Abstract:
Tissue equivalent proportional counters (TEPCs) are recognized as standard instrument for cosmic radiation dose measurement because it can separate gamma and neutron spectra in mixed field microdosimetry. HAWK TEPC was employed in the project as a reference instrument to measure the cosmic radiation exposure in terms of dose equivalent and ambient dose equivalent at ground level, calibrate and compare the doses obtained from the analytical model based on Excel-based Program for Calculating Atmospheric Cosmic Ray Spectrum (EXPACS) and the overflow channel of Canada's Fixed Point Surveillance (FPS) spectrometer. The process of understanding the performance of TEPC as well as designed experiments for cosmic radiation dose measurement done at 8 different locations were presented. Experimental doses obtained with TEPC is consistent with the analytical results, the minimum and maximum discrepancies are 3.8 % and 26.8 % respectively. The work will be further evaluated and applied to other FPS stations.