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SOI Thin Microdosimeter Detectors for Low Energy Ions and Radiation Damage Studies

Journal Article


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Abstract


  • The responses of two silicon on insulator (SOI) 3-D microdosimeters developed by the Centre for Medical Radiation Physics were investigated with a range of different low energy ions, with high linear energy transfer (LET). The two microdosimeters n-SOI and p-SOI were able to measure the LET of different ions including 7 Li, 12 C, 16 O, and 48 Ti with ranges below 350 μm in silicon. No plasma effects were seen in the SOI microdosimeters when irradiated with the high LET ions. A Monte Carlo simulation using Geant4 was compared to the experimental measurements, whereby some discrepancies were observed for heavier ions at lower energies. This discrepancy can be partly attributed to uncertainties in the thickness of the energy degraders and overlayers of the devices. The microdosimetric measurements of low energy 16 O ions were obtained and compared to a therapeutic 16 O ion beam. The radiation hardness of the two devices was studied using the ion beam induced charge collection technique. Both types of the microdosimeters when biased had no essential changes in charge collection efficiency in the sensitive volume after irradiation with low energy ions.

Authors


  •   James, Benjamin (external author)
  •   Tran, Linh T.
  •   Vohradsky, James (external author)
  •   Bolst, David
  •   Pan, Vladimir (external author)
  •   Carr, Maddie (external author)
  •   Guatelli, Susanna
  •   Pogossov, Alex (external author)
  •   Petasecca, Marco
  •   Lerch, Michael L. F.
  •   Prokopovich, Dale A.
  •   Reinhard, Mark I. (external author)
  •   Povoli, Marco (external author)
  •   Kok, Angela (external author)
  •   Hinde, David (external author)
  •   Dasgupta, Mahananda (external author)
  •   Stuchbery, Andrew (external author)
  •   Perevertaylo, Vladimir L. (external author)
  •   Rosenfeld, Anatoly B.

Publication Date


  • 2019

Citation


  • James, B., Tran, L. T., Vohradsky, J., Bolst, D., Pan, V., Carr, M., Guatelli, S., Pogossov, A., Petasecca, M., Lerch, M., Prokopovich, D. A., Reinhard, M. I., Povoli, M., Kok, A., Hinde, D., Dasgupta, M., Stuchbery, A., Perevertaylo, V. & Rosenfeld, A. B. (2019). SOI Thin Microdosimeter Detectors for Low Energy Ions and Radiation Damage Studies. IEEE Transactions on Nuclear Science, 66 (1), 320-326.

Scopus Eid


  • 2-s2.0-85058180628

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=3307&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/2300

Number Of Pages


  • 6

Start Page


  • 320

End Page


  • 326

Volume


  • 66

Issue


  • 1

Place Of Publication


  • United States

Abstract


  • The responses of two silicon on insulator (SOI) 3-D microdosimeters developed by the Centre for Medical Radiation Physics were investigated with a range of different low energy ions, with high linear energy transfer (LET). The two microdosimeters n-SOI and p-SOI were able to measure the LET of different ions including 7 Li, 12 C, 16 O, and 48 Ti with ranges below 350 μm in silicon. No plasma effects were seen in the SOI microdosimeters when irradiated with the high LET ions. A Monte Carlo simulation using Geant4 was compared to the experimental measurements, whereby some discrepancies were observed for heavier ions at lower energies. This discrepancy can be partly attributed to uncertainties in the thickness of the energy degraders and overlayers of the devices. The microdosimetric measurements of low energy 16 O ions were obtained and compared to a therapeutic 16 O ion beam. The radiation hardness of the two devices was studied using the ion beam induced charge collection technique. Both types of the microdosimeters when biased had no essential changes in charge collection efficiency in the sensitive volume after irradiation with low energy ions.

Authors


  •   James, Benjamin (external author)
  •   Tran, Linh T.
  •   Vohradsky, James (external author)
  •   Bolst, David
  •   Pan, Vladimir (external author)
  •   Carr, Maddie (external author)
  •   Guatelli, Susanna
  •   Pogossov, Alex (external author)
  •   Petasecca, Marco
  •   Lerch, Michael L. F.
  •   Prokopovich, Dale A.
  •   Reinhard, Mark I. (external author)
  •   Povoli, Marco (external author)
  •   Kok, Angela (external author)
  •   Hinde, David (external author)
  •   Dasgupta, Mahananda (external author)
  •   Stuchbery, Andrew (external author)
  •   Perevertaylo, Vladimir L. (external author)
  •   Rosenfeld, Anatoly B.

Publication Date


  • 2019

Citation


  • James, B., Tran, L. T., Vohradsky, J., Bolst, D., Pan, V., Carr, M., Guatelli, S., Pogossov, A., Petasecca, M., Lerch, M., Prokopovich, D. A., Reinhard, M. I., Povoli, M., Kok, A., Hinde, D., Dasgupta, M., Stuchbery, A., Perevertaylo, V. & Rosenfeld, A. B. (2019). SOI Thin Microdosimeter Detectors for Low Energy Ions and Radiation Damage Studies. IEEE Transactions on Nuclear Science, 66 (1), 320-326.

Scopus Eid


  • 2-s2.0-85058180628

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=3307&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/2300

Number Of Pages


  • 6

Start Page


  • 320

End Page


  • 326

Volume


  • 66

Issue


  • 1

Place Of Publication


  • United States