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- Title
Mosaic diamond detectors for fast neutrons and large ionizing radiation fields.
- Authors
Girolami, Marco; Bellucci, Alessandro; Calvani, Paolo; Cazzaniga, Carlo; Rebai, Marica; Rigamonti, Davide; Tardocchi, Marco; Pillon, Mario; Trucchi, Daniele M.
- Abstract
First neutron and X-ray beam tests on a novel 12-pixel singlecrystal diamond mosaic detector are presented and discussed. Preliminary characterization of single-pixel electronic properties, performed with α particles, results in charge carrier mobilities >2000 cm2 Vs-1 and saturation velocities of the order of 107 cm s-1. Signal stability over time, measured with a 241Am source (37 kBq activity), is longer than 5 h. Tests under an intense X-ray beam (1 Gy h-1 dose-rate) show a very good response uniformity (down to about 1% of relative standard deviation from mean value), suggesting a high level of pixel reproducibility at intermediate bias voltages (ranging from 20 to 100 V). Response uniformity reduces at voltages>200 V, due presumably to radiation-assisted detrapping effects. Preliminary results of 12-pixel simultaneous acquisitions of X-ray beam profiles and pulse height spectra under a fast neutron beam (14 MeV) are also presented.
- Subjects
DIAMONDS; DETECTORS; FAST neutrons; IONIZING radiation; MOSAIC structure
- Publication
Physica Status Solidi. A: Applications & Materials Science, 2015, Vol 212, Issue 11, p2424
- ISSN
1862-6300
- Publication type
Article
- DOI
10.1002/pssa.201532191