https://doi.org/10.1140/epjti/s40485-025-00119-1
Research
Study of ion detection efficiency in Jet Counter nanodosimeter
1
Biomedical Physics Division, Faculty of Physics, University of Warsaw, Warsaw, Poland
2
Radiological Metrology and Biomedical Physics Division, National Centre for Nuclear Research, Otwock, Poland
3
Heavy Ion Laboratory, University of Warsaw, Warsaw, Poland
4
Cyclotron Centre Bronowice, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
a
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Received:
12
September
2025
Accepted:
9
December
2025
Published online:
9
February
2026
Abstract
This work reevaluates the ion detection efficiency of the Jet Counter nanodosimeter working with low-pressure nitrogen. SIMION simulations were used to model the trajectories of ions during their extraction from the interaction chamber. The study examined the relationship between efficiency vs. extraction voltage, gas density, and temperature. The highest detection efficiency (approximately 60%) was achieved at a high extraction voltage and low temperature. The findings were then used as a parameter in the Monte Carlo modeling of the Jet Counter operations, and the results were compared with experimental results, showing satisfactory agreement.
Key words: Jet Counter / Nanodosimetry / Ion detection / Ion extraction / Detector efficiency / SIMION / Geant4 / Monte Carlo
Present address: Cyclotron Centre Bronowice, Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
© The Author(s) 2026
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