TESTING DIFFERENT AREA DOSEMETERS CONCERNING THEIR BEHAVIOUR IN PULSED RADIATION FIELDS.

In Germany, authorised experts are required to measure around an X-ray facility to determine supervised and controlled areas within the scope of a legal regulatory procedure. For this purpose, they have to use area dosemeters which are nationally type-approved by the PTB according to the German measurement and verification act. To date, all available type-approved area dosemeters are only tested in continuous radiation fields, and therefore the technical data of the measuring instruments are valid only for continuous radiation. In practice, however, the majority of facilities use pulsed radiation X-rays. Since no other measuring equipment is available, the authorised experts use supposedly unsuitable dosemeters. But is this really so? In the scope of this article, instruments typically used for these measurements were tested to investigate their behaviour in pulsed radiation fields. The approach is similar to that of Friedrich et al.