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PhD Studentship Opportunity in Feasibility Study of Organic Semiconducting crystals for dosimetry in Radiotherapy and radioprotection applications


Project Description

This joint UK-Australia project will develop new radiation sensors using novel organic single crystals. Students will spend half their time at the University of Surrey in the UK, and half their time in Australia at the University of Wollongong, close to Sydney.

Recently feasibility studies of novel organic semiconducting crystals for implementation as radiation detectors has been conducted successfully by several groups [1-2]. In this project we focus on the characterisation of the radiation response of organic crystals in terms of mobility, charge collection efficiency as a function of bias, and their dose response to radiation.

The proposed HDR research aims to build on the existing expertise in organic radiation sensors at both University of Wollongong and the University of Surrey, and to investigate the performance of these innovative materials for dosimetry in photon and hadron therapy applications. The assessment of such materials throughout this project will allow the potential development of a new class of dosimeter devices with the advantage to require no correction factors for energy corrections for dose in water.

This project will aim to complete the following key objectives:
1. Simulation study to optimize semiconductor geometries in Geant4 for implementation in dosimetry devices;
2. Evaluation of the tissue equivalency of the materials for different particle species such as electrons, photons, heavy ions and protons.
3. Investigation of the potential applications of preliminary devices in areas such as Heavy-Ion therapy and Space Radiation Protection;
4. Fabrication of prototype devices and optimisation of contact type and structure;
5. Experimental measurements of charge collection capabilities and radiation hardness.
Finally, all key findings throughout the project will be culminated into a final thesis to be presented at the conclusion of the PhD degree.

Project Supervisors:
This dual award degree program is jointly supervised by University of Wollongong, Australia, and by University of Surrey, UK. Please contact either of the supervisors to discuss your interest in this project before submitting a formal application:

Associate Professor Marco Petasecca
Centre for Medical Radiation Physics
University of Wollongong
Email:
https://scholars.uow.edu.au/display/marco_petasecca

Professor Paul Sellin
Department of Physics
University of Surrey
Email:
https://www.surrey.ac.uk/people/paul-sellin

This is a three year project, commencing in July 2020 at the University of Wollongong, Australia.

Entry requirements:
Applicants should have a BSc/MPhys in Physics, 2.1 or higher or a Masters in Physics. IELTS: 6.5 or above (or equivalent) with no sub-test of less than 6.

How to apply:
You must have at least two academic supervisors from the University of Surrey and one from the University of Wollongong. Please contact your prospective supervisors to discuss project options before completing the applications. You will need to apply to the PhD programmes both at Surrey and Wollongong and complete a separate funding application form. Full details can be found at: https://www.surrey.ac.uk/fees-and-funding/studentships/ugpn-studentship-joint-dual-degree-scheme

Funding Notes

This studentship will be funded through the University of Surrey and University of Wollongong joint degree scheme. This joint degree scheme has numerous benefits:
• A sandwich structure enabling PhD students to spend time at Surrey and Wollongong
• Supervisory teams bringing together experts from Surrey and Wollongong
• A financial package covering fees and stipend
• Access to facilities and expertise from both institutions

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