Characterization of a Large Area Thinned Silicon Microdosimeter for Space and Particle Therapy

Author

Chartier, Lachlan ; Tran, Linh T. ; Bolst, David ; Prokopovich, Dale A. ; Reinhard, Mark I. ; Petasecca, Marco ; Lerch, Michael ; Povoli, Marco ; Kok, Angela ; Matsufuji, Naruhiro ; Nancarrow, Mitchell ; Rosenfeld, Anatoly B.

Author_Institution

Centre for Med. Radiat. Phys., Univ. of Wollongong, Wollongong, NSW, Australia

Volume

62

Issue

6

fYear

2015

Firstpage

3003

Lastpage

3011

Abstract

The tissue-equivalent proportional counter is the gold standard detector in microdosimetry. The energy deposited in its volume is equal to that of a single cell through the use of low pressure tissue-equivalent gas. To overcome its bulky gas-flow ensemble, high operating voltage and poor spatial resolution, a 20 μm-thick silicon microdosimeter with 9600 micron-sized sensitive volumes has been developed. Presented are the results from its initial characterization including electrical properties and charge collection characteristics obtained using induced charge collection techniques at ANSTO, Australia, and the ESRF, France. In addition, the results from a 290 MeV/u C-12 irradiation at HIMAC, NIRS, Japan, are presented.

Keywords

biomedical equipment; dosimeters; dosimetry; silicon; Si; bulky gas-flow; charge collection characteristics; electrical properties; induced charge collection techniques; low pressure tissue-equivalent gas; microdosimetry; particle therapy; space therapy; thinned silicon microdosimeter; tissue-equivalent proportional counter; Dosimetry; Silicon devices; Microdosimetry; silicon microdosimeter;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2015.2488679

Filename

7348742