REFLECT – Research flight of EURADOS and CRREAT: Intercomparison of various radiation dosimeters onboard aircraft

Ambrožová, Iva; Beck, P.; Benton, E. R.; Billnert, R.; Bottollier-Depois, J.-F.; Caresana, M.; Dinar, N.; Domański, Szymon; Gryziński, M.; Kákona, Martin; Kolros, Antonín; Krist, Pavel; Kuć, Michał; Kyselová, Dagmar; Latocha, M.; Leuschner, A.; Lillhök, Jan; Maciak, Maciej; Mares, V.; Murawski, Łukasz; Pozzi, Fabio; Reitz, Guenther; Schennetten, Kai; Silari, M.; Šlegl, Jakub; Sommer, Marek; Štěpán, Václav; Trompier, F.; Tscherne, Christoph; Uchihori, Y.; Vargas, Arturo; Viererbl, L.; Wieluński, M.; Wising, Mie; Zorloni, Gabriele; Ploc, Ondřej

doi:10.1016/j.radmeas.2020.106433

Cited by 17 publications

(11 citation statements)

References 62 publications

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“…Such chambers are designed for environmental dosimetry measurements for radiation protection in radiation fields of unknown compositions and energy spectrums. They have been successfully used to study radiation fields produced by isotope sources, nuclear reactors [ 7 ] and research and medical accelerators [ 8 , 9 ]; radiation fields with high particle energies [ 10 , 11 , 12 ]; environmental measurements [ 1 ]; and neutron monoenergetic fields [ 6 ].…”

Section: Methodsmentioning

confidence: 99%

A Sub-Picoampere Measurement Algorithm for Use in Dosimetry of Time-Varying Radiation Fields

Kuć,

Maciak,

Tulik

2024

Sensors

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Dosimetry based on gas detectors operating in the recombination and saturation region provides unique research opportunities but requires high-quality electrometers with a measuring range below 1 pA (10−12 A). The standard approach in electrometry is to strive to increase the accuracy and precision of the measurement, ignoring the importance of its duration. The article presents an algorithm for the measurement of low current values (from 100 fA) that allows both a fast measurement (with a step of 2.3 ms) and high accuracy (measurement error below 0.1%), depending on the measurement conditions and the expected results. A series of tests and validations of the algorithm were carried out in a measurement system with a Keithley 6517B electrometer and a REM-2 recombination chamber under conditions of constant and time-varying radiation fields. The result of the work is a set of parameters that allow for the optimisation of the operation of the algorithm, maximising the quality of the measurements according to needs and the expected results. The algorithm can be used in low current measurement systems, e.g., for dosimetry of mixed radiation fields using recombination methods and chambers.

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Section: Methodsmentioning

confidence: 99%

A Sub-Picoampere Measurement Algorithm for Use in Dosimetry of Time-Varying Radiation Fields

Kuć,

Maciak,

Tulik

2024

Sensors

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“…Carry out intercomparisons of radiation exposure codes and their experimental verification ( 63 ) , especially in the presence of solar storms ( 64 ) . Neutrons are also the dominant component of the radiation field in commercial aviation ( 65 ) and are responsible for doses to air crew ( 66 ) which are currently assessed using ad hoc computer codes ( 67 ) .…”

Section: Vision 5: Towards Improved Radiation Protection Of Workers and The Publicmentioning

confidence: 99%

Eurados Strategic Research Agenda 2020: Vision for the Dosimetry of Ionising Radiation

Harrison

Ainsbury

Alves

et al. 2021

Radiation Protection Dosimetry

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Since 2012, the European Radiation Dosimetry Group (EURADOS) has developed its Strategic Research Agenda (SRA), which contributes to the identification of future research needs in radiation dosimetry in Europe. Continued scientific developments in this field necessitate regular updates and, consequently, this paper summarises the latest revision of the SRA, with input regarding the state of the art and vision for the future contributed by EURADOS Working Groups and through a stakeholder workshop. Five visions define key issues in dosimetry research that are considered important over at least the next decade. They include scientific objectives and developments in (i) updated fundamental dose concepts and quantities, (ii) improved radiation risk estimates deduced from epidemiological cohorts, (iii) efficient dose assessment for radiological emergencies, (iv) integrated personalised dosimetry in medical applications and (v) improved radiation protection of workers and the public. This SRA will be used as a guideline for future activities of EURADOS Working Groups but can also be used as guidance for research in radiation dosimetry by the wider community. It will also be used as input for a general European research roadmap for radiation protection, following similar previous contributions to the European Joint Programme for the Integration of Radiation Protection Research, under the Horizon 2020 programme (CONCERT). The full version of the SRA is available as a EURADOS report (www.eurados.org).

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“…measured differences in the stray radiation fields between photon and proton therapy ( 11 ). Several cosmic radiation measurements have been performed, where the variance and variance–covariance methods have been compared with other methods ( 12 , 13 ) and with several instruments ( 14 ). The method has also successfully been used in mixed workplace fields with photons and neutrons and strongly pulsed stray radiation fields from accelerators ( 15 , 16 ).…”

Section: Introductionmentioning

confidence: 99%

Range-shifter effects on the stray field in proton therapy measured with the variance–covariance method

et al. 2022

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Measurements in the stray radiation field from a proton therapy pencil beam at energies 70 and 146 MeV were performed using microdosimetric tissue-equivalent proportional counters (TEPCs). The detector volumes were filled with a propane-based tissue-equivalent gas at low pressure simulating a mean chord length of 2 μm in tissue. Investigations were performed with and without a beam range shifter, and with different air gaps between the range shifter and a solid water phantom. The absorbed dose, the dose-mean lineal energy, and the dose equivalent were determined for different detector positions using the variance–covariance method. The influence from beam energy, detector- and range-shifter positions on absorbed dose, LET, and dose equivalent were investigated. Monte Carlo simulations of the fluence, detector response, and absorbed dose contribution from different particles were performed with MCNP 6.2. The simulated dose response for protons, neutrons, and photons were compared with, and showed good agreement with, previously published experimental data. The simulations also showed that the TEPC absorbed dose agrees well with the ambient absorbed dose for neutron energies above 20 MeV. The results illustrate that changes in both dose and LET variations in the stray radiation field can be identified from TEPC measurements using the variance–covariance method. The results are in line with the changes seen in the simulated relative dose contributions from different particles associated with different proton energies and range-shifter settings. It is shown that the proton contribution scattered directly from the range shifter dominates in some situations, and although the LET of the radiation is decreased, the ambient dose equivalent is increased up to a factor of 3.

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REFLECT – Research flight of EURADOS and CRREAT: Intercomparison of various radiation dosimeters onboard aircraft

Cited by 17 publications

References 62 publications

A Sub-Picoampere Measurement Algorithm for Use in Dosimetry of Time-Varying Radiation Fields

A Sub-Picoampere Measurement Algorithm for Use in Dosimetry of Time-Varying Radiation Fields

Eurados Strategic Research Agenda 2020: Vision for the Dosimetry of Ionising Radiation

Range-shifter effects on the stray field in proton therapy measured with the variance–covariance method

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