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Published on: April 26, 2018
Use of statistical checks as maintenance tools for TLD readers
M Weinstein1, Y Shemesh, A Abraham
1Nuclear Research Centre Negev P.O. Box 9001, 84190 Beer-Sheva, Israel. marcelow@bezeqint.net
Abstract:
Although the values of different parameters may remain within permissible limits during the operation of a thermoluminescent dosemeter (TLD) reader, certain effects can become apparent only when a long-term followup of these parameters is performed. In order to ensure an accurate and reliable operation of a TLD reader, the system characteristics must be monitored continuously. Long-term statistical checks of key system parameters may give a broader insight into the operational characteristics of the TLD reader and may help for proper maintenance of the system. The photomultipliers noise, the internal reference light source stability and the A to D reference voltage were found to be critical parameters, which have a major influence on the accuracy and stability of the system. A followup of these parameters for a period of about 10 y is presented, and some problems are seen to be reflected in the distributions.
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