Operation and Application of Tissue Equivalent Proportional Counters

The application of TEPCs during the past decades in dosimetry, radiation protection and radiation therapy has revealed their large potential but also the necessity of careful operation. This paper reviews the experience gathered in the past and summarises the experimental procedures to ensure proper TEPC operation. The measurement system is described including detector, electronics and quality assurance. The pulse height analysis and its interpretation in terms of microdosimetric spectra and mean values are presented as well as the variance method. On the basis of these evaluation procedures, the second part of the paper presents some typical examples of TEPC applications : dose spectrometry, time-of-flight techniques and the measurement of dose equivalent quantities. Special attention is paid to possible extensions but also to limitations of the use of TEPCs in the various fields of application.