تقرير
Characterization of a CdZnTe detector for a low-power CubeSat application
| العنوان: | Characterization of a CdZnTe detector for a low-power CubeSat application |
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| المؤلفون: | Lucchetta, Giulio, Ackermann, Markus, Berge, David, Bloch, Ingo, Bühler, Rolf, Kolanoski, Hermann, Lange, Wolfgang, Zappon, Francesco |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We report spectral and imaging performance of a pixelated CdZnTe detector custom designed for the \emph{MeVCube} project: a small Compton telescope on a CubeSat platform. \emph{MeVCube} is expected to cover the energy range between $200\;\mathrm{keV}$ and $4\;\mathrm{MeV}$, with performance comparable to the last generation of larger satellites. In order to achieve this goal, an energy resolution of few percent in full width at half maximum (FWHM) and a $3$-D spatial resolution of few millimeters for the individual detectors are needed. The severe power constraints present in small satellites require very low power read-out electronics for the detector. Our read-out is based on the VATA450.3 ASIC developed by \emph{Ideas}, with a power consumption of only $0.25\;\mathrm{mW/channel}$, which exhibits good performance in terms of dynamic range, noise and linearity. A $2.0\;\mathrm{cm} \times 2.0\;\mathrm{cm} \times 1.5\;\mathrm{cm}$ CdZnTe detector, with a custom $8 \times 8$ pixel anode structure read-out by a VATA450.3 ASIC, has been tested. A preliminary read-out system for the cathode, based on a discrete \emph{Amptek} A250F charge sensitive pre-amplifier and a DRS4 ASIC, has been implemented. An energy resolution around $3\%$ FWHM has been measured at a gamma energy of $662\;\mathrm{keV}$; at $200\;\mathrm{keV}$ the average energy resolution is $6.5\%$, decreasing to $\lesssim 2\%$ at energies above $1\;\mathrm{MeV}$. A $3$-D spatial resolution of $\approx 2\,\mathrm{mm}$ is achieved. Comment: Accpted for publication in JINST |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1748-0221/17/08/P08004 |
| URL الوصول: | http://arxiv.org/abs/2204.00475 |
| رقم الأكسشن: | edsarx.2204.00475 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1748-0221/17/08/P08004 |
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