Local dosimeter to measure the equivalent environmental dose of photonic radiation and reading procedure

摘要

Local dosimeter (1) for measuring the equivalent environmental dose (H * (10)) of photonic radiation (P) comprising: a dispersion body (30) for photonic radiation (P), which provides dispersion contributions for the interval Low energy photonic radiation, a detector card (2) embedded in the dispersion body (30) with at least a first pair (10) of elements (12, 14) photonic radiation sensitive detectors with the same behavior of response for the photonic radiation (P) to be measured, the card (2) detecting a card plane (E), and the two detector elements (12, 14) being arranged side by side or one above the other in the card plane (E) on the detector card (2), and the arrangement of dispersion body (30) and detector elements (12, 14) being constructed essentially with mirror symmetry with respect to the card plane (E), being constructed, so that the two elements (12, 14) detectors are sens ible to photonic radiation from both sides of the card plane (E) in the same way, to achieve a measurement of photonic radiation (P) in an angular range of almost 360 °, characterized in that, in addition to the dispersion body (30) which provides dispersion contributions for the low energy range two spectral filter sheets (52a, 52b) are arranged that change the photonic spectrum to the detriment of the energies below 30 keV, inside the dispersion body (30), such that the first (12) of the two sensing elements is positioned between the two filter sheets (52a, 52b), so that the photonic radiation (P) that strikes the first detector element (12) or is filter by the filter sheet (52a) or by the other filter sheet (52b), depending on whether the photonic radiation (P) impacts from the front or the rear on the first detector element (12), the two being configured same filter sheets (52a, 52b) with respect to its spectral filter effect, to achieve the same spectral filter effect for photonic radiation (P) from front and back, and because the second of the two detector elements (14) it is not arranged between the same filter sheets (52a, 52b) as the first detector element (12), so that the photonic radiation (P) dispersed by the dispersion body (30) and spectrally filtered by one of the two filter sheets (52a, 52b) that affect the first detector element (12) in particular with energies between 10 keV and 30 keV have another spectral distribution than that of the photonic radiation (P) dispersed by the body (30) of dispersion that affects the second detector element (14).