Abstract
Microdosimetry studies the probability distribution of the imparted energy when an ionizing particle crosses site size in order of the μm.
The Tissue Equivalent Proportional Counter (TEPC) is a microdosimetric instrument that measures radiation dose and dose equivalent in complex radiation fields (fields containing a mixture of particle types).
The signal processing chain convert the signal from the TEPC in a pulse signal and measure the pulse height distributions which correspond to an energy deposition distribution in the simulated microscopic volume of the detector.
The aims of this work are:
• To perform a systematic investigation with a new digital acquisition system: by testing the resolution, input counting rate, dynamic range, stability and reproducibility.
• To optimize the electronic chain.
• To perform microdosimetric measurements with a TEPC with gamma and neutron sources.
Lineal energy distributions for neutrons and gamma rays were measured using a TEPC with three different preamplifiers and with both acquisition systems, Inspector from Canberra and the DT5780 from CAEN. A series of measurements were performed with the counter filled with propane-based tissue equivalent gas at operating gas pressure corresponding to a site size of 2.0 μm in diameter.
Details
Original language | English |
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Qualification | Master of Science |
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Awarding Institution | - UniPi - Università di Pisa
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Supervisors/Advisors | |
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Thesis sponsors | |
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Award date | 26 Apr 2017 |
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Publication status | Published - 26 Apr 2017 |
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