کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1831593 | 1027499 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of temperature on the response of high-quality polycrystalline diamond detectors Influence of temperature on the response of high-quality polycrystalline diamond detectors](/preview/png/1831593.png)
We investigated the charge collection properties of a polycrystalline CVD diamond detector in a temperature range from -10-10 to 80∘C, by means of a 90Sr minimum ionizing ββ radiation source. The sample is a state-of-the-art diamond sensor yielding a maximum charge collection distance of 260μm at room temperature and 1V/μm applied field, when set in the so called pumped state, i.e., after passivating the deep traps with a pre-irradiation with ββ particles. We observed a decreasing charge collection distance with increasing temperature, which is a trend opposite to that reported recently by other research groups. We ascribe this discrepancy to the higher quality of our detector, in terms of a lower concentration of defects and grain boundaries. Conversely, we observe a less dramatic temperature dependence which we tentatively explain assuming a combined effect of variation with temperature of the thermal velocity and of the capture cross-section, according to a well known model of multi-phonon non-radiative processes.
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 570, Issue 2, 11 January 2007, Pages 303–307