An autonomous Radon sensor with wireless connectivity has been developed, using a BJT detector on high-resistivity silicon as alpha-particle detector. Charged Radon daughters are collected on the detector surface electrostatically. Thanks to the BJT internal amplification, real-time alpha particle detection is made possible using a very simple readout electronics which records alpha-particle arrival time and charge. Functional tests at known Radon concentrations demonstrated a sensitivity up to 4.9 cph/(100 Bq/m^3), which translates into the capability of detecting a Radon concentration of 200±20 Bq/m^3 and 500±50 Bq/m^3 after 10 and 4 h, respectively. The count rate at nominally-zero Radon concentration was 0.05 cph.

Performance of a Radon Sensor Based on a BJT Detector on High-Resistivity Silicon

Dalla Betta, Gian Franco;Tyzhnevyi, Vladyslav;Rachevskaia, Irina;Boscardin, Maurizio;Giacomini, Gabriele;
2012-01-01

Abstract

An autonomous Radon sensor with wireless connectivity has been developed, using a BJT detector on high-resistivity silicon as alpha-particle detector. Charged Radon daughters are collected on the detector surface electrostatically. Thanks to the BJT internal amplification, real-time alpha particle detection is made possible using a very simple readout electronics which records alpha-particle arrival time and charge. Functional tests at known Radon concentrations demonstrated a sensitivity up to 4.9 cph/(100 Bq/m^3), which translates into the capability of detecting a Radon concentration of 200±20 Bq/m^3 and 500±50 Bq/m^3 after 10 and 4 h, respectively. The count rate at nominally-zero Radon concentration was 0.05 cph.
2012
9781467320283
9781467320290
9781467320306
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11582/135801
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