A diamond guard ring microdosimeter for ion beam therapy.
Rev Sci Instrum
; 91(5): 054102, 2020 May 01.
Article
em En
| MEDLINE
| ID: mdl-32486707
ABSTRACT
A single crystal chemical vapor deposition diamond-based microdosimeter prototype featuring an array of micro-sensitive volumes (µSVs) and surrounded by a so-called guard ring (GR) electrode has been fabricated using various microfabrication techniques available at Diamond Sensors Laboratory of CEA, Saclay. The GR microdosimeter was irradiated by a raster scanning method with 2 MeV proton microbeams. The charge transport properties of the GR sensor were determined with sub-micron spatial resolution by measuring the charge collection efficiency (CCE), the µSV geometry, and the pulse-height spectra. The response of the microdosimeter showed a well-defined and homogeneously active µSV. Appropriate biasing of the µSV structures led toward a full CCE for protons with lineal energies of â¼46 keV/µm. This shows the GR microdosimeter's great potential for applications in microdosimetry in clinical beam conditions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radiometria
/
Diamante
/
Terapia com Prótons
Idioma:
En
Revista:
Rev Sci Instrum
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
França