Calibration of Silicon Detectors Liulin and ARDOS Using Cosmic Rays and Timepix for Use at Flight Altitudes

0560651 - ÚJF 2023 RIV GB eng J - Journal Article
Sommer, Marek - Štěpánová, Dagmar - Kákona, Martin - Velychko, Olena - Ambrožová, Iva - Ploc, Ondřej
Calibration of Silicon Detectors Liulin and ARDOS Using Cosmic Rays and Timepix for Use at Flight Altitudes.
Radiation Protection Dosimetry. Roč. 198, 9-11 (2022), s. 597-603. ISSN 0144-8420. E-ISSN 1742-3406
R&D Projects: GA MŠMT EF15_003/0000481
Institutional support: RVO:61389005
Keywords : silicon detectors * cosmir radiation measurement * onboard aircraft
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1093/rpd/ncac104

Silicon detectors such as Liulin and AIRDOS are used for cosmic radiation measurements onboard aircraft. These measurements can be used for the verification of computer programs assessing aircraft crew radiation exposure. Recently performed intercomparison flights showed large variances of absorbed doses among individual detectors and significant differences between results of silicon detectors and computer programs. In order to explain for these differences, we have developed energy calibration method that can be performed on short flights. The method is based on cross-calibration of Liulin and AIRDOS deposited energy spectra with deposited energy spectra measured by Timepix which has superior detection properties in terms of energy resolution and the detection threshold. Moreover, the portion of dose which is omitted due to low sensitivity for low-energy deposits was calculated. The resulting absorbed dose rates at two intercomparison flights show significantly improved variation of results and better agreement with modelled absorbed dose rates.
Permanent Link: https://hdl.handle.net/11104/0333511