Mosaic diamond detectors for fast neutrons and large ionizing radiation fields
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2015-06-18 |
| Journal | physica status solidi (a) |
| Authors | M. Girolami, A. Bellucci, P. Calvani, Carlo Cazzaniga, M. RebaÄ±Ì |
| Institutions | National Agency for New Technologies, Energy and Sustainable Economic Development, Sapienza University of Rome |
| Citations | 44 |
Abstract
Section titled âAbstractâFirst neutron and Xâray beam tests on a novel 12âpixel singleâcrystal diamond mosaic detector are presented and discussed. Preliminary characterization of singleâpixel electronic properties, performed with α particles, results in charge carrier mobilities >2000 cm 2 Vs â1 and saturation velocities of the order of 10 7 cm s â1 . Signal stability over time, measured with a 241 Am source (37 kBq activity), is longer than 5 h. Tests under an intense Xâray beam (1 Gy h â1 doseârate) 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 radiationâassisted detrapping effects. Preliminary results of 12âpixel simultaneous acquisitions of Xâray beam profiles and pulse height spectra under a fast neutron beam (14 MeV) are also presented.