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Fabrication and Characterization of Silicon Detectors for use in Radiotherapy Dosimetry, Pre-irradiated by High Energy Electrons
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (Electronics design division)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (STC)
Responsible organisation
2007 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 576, no 1, 209-214 p.Article in journal (Refereed) Published
Abstract [en]

Fabricated silicon detectors for use in radiotherapy dosimetry have been pre-irradiated by means of 10 MeV electrons. The purpose of this irradiation is to saturate the diffusion carrier length in order to achieve linear dose rate dependence. A characterized n+p-detector has a relatively flat sensitivity slope after pre-irradiation and the detector exhibits a low leakage current and high shunt-resistance. The int. E-detector has a constant sensitivity slope for all doses and consequently requires no pre-irradiation. Due to a larger generation carrier volume, the leakage current and shunt-resistance are respectively higher and lower in comparison to the n+p-detector. After the annealing of the detectors has taken place, the n+p has the lowest leakage current and there is already significant recovery at 200 ˚C. The int. E detector has a constant sensitivity response to all the applied doses and performed annealing. The leakage current for the int. E detector improved to acceptable values after a FGA step was performed. An unacceptably high leakage current and low shunt-resistance means that the E-detectors are not considered to be useful for this application.

Place, publisher, year, edition, pages
2007. Vol. 576, no 1, 209-214 p.
Keyword [en]
Electron irradiation, Gamma detector, Radiotherapy dosimetry, Silicon detector, Thin silicon detector
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-3909DOI: 10.1016/j.nima.2007.01.154ISI: 000247330000046Scopus ID: 2-s2.0-34248202638Local ID: 4277OAI: oai:DiVA.org:miun-3909DiVA: diva2:28941
Conference
8th International Workshop on Radiation Imaging Detectors, Jul 02-06, 2006, Pisa, Italy
Projects
STC - Sensible Things that Communicate
Note

8th International Workshop on Radiation Imaging Detectors, JUL 02-06, 2006, Pisa, Italy

Available from: 2008-09-30 Created: 2009-07-29 Last updated: 2016-10-05Bibliographically approved

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Thungström, GöranMattsson, Claes
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Electrical Engineering, Electronic Engineering, Information Engineering

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