I work at the center that has a TLD-Reader model 4500. I know the that main sources of uncertainty in environmental dosimetry are: energy and angular dependence, temperature, humidity, linearity, ECC,RCF,Zero dose, ....
may you tell me the procedure of uncertainty calculation for these factors?
Dear Majid
There is good information in attached documents.Hope this helps you.
There are many different possible sources of uncertainty for this approcah to measuring dose. Sources of variation include individual chip characteristics, and others sources you mention in your question. As a starting point, I would take an empirical approach and expose your chips to a known source to assess inter-TLD variation. I would repeat this process several times to assess intra-TLD variation. In terms of environmental monitoring, I would also consider using several TLDs together for an individual target and use the average of the readings after correcting for inter-TLD variation. In other words, the usual issues of taking environmental measurements apply and thus one must attempt to estimate the repeatability of a given set of measurements in order to quantify the uncertainty of a given measurement.
Total error = (a^2+b^2+c^2+.....)^0.5; If errors in various measurements say calibration, fading, angular dependence etc.... are a%; b%; c% and so on.
See attachment for clarity.
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