Conference paper
A CZT high efficiency detector with 3D spatial resolution for Laue lens applications
For X- and γ-ray astronomy in the coming decades, both ESA and NASA have indicated in their guidelines the importance of developing innovative instrumentation operating in the hard X- and soft γ-ray range where important scientific issues are still open, exploiting high sensitivity (50–100 times better than current instruments) for spectroscopic imaging and polarimetric observations.
In this framework, the development of new focusing optics based on wide band Laue lenses operating from ∼60 keV up to several hundred keV is particularly challenging. These new high energy focusing optics require high performance focal plane detectors in order to exploit to the maximum the intrinsic capabilities of these new high energy telescopes.
We describe the ongoing development of a three dimensional (3D) position sensitive device suitable as the basic unit of a high efficiency focal plane detector for a Laue lens telescope and the results obtained during preliminary functional tests. The sensitive unit is a drift strip detector based on a CZT crystal, (19×8 mm2 area, 2.4 mm thick), irradiated transversally to the electric field direction.
The anode is segmented into 4 detection cells, each comprising one collecting strip and 8 drift strips. The drift strips are biased by a voltage divider. The cathode is divided into 4 horizontal strips for the reconstruction of the third coordinate of the interaction. The final 3D prototype is made by packing 8 linear modules, each composed of one basic sensitive unit, bonded onto a supporting ceramic layer.
The readout electronics implements the new RENA-3 Asics and the data handling system uses custom designed FPGA based electronics to provide both the ASIC operation and the acquisition logic.
Language: | English |
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Publisher: | IEEE |
Year: | 2010 |
Pages: | 3983-3688 |
Proceedings: | Nuclear Science Symposium Conference |
ISBN: | 1424491045 , 1424491053 , 1424491061 , 9781424491049 , 9781424491056 and 9781424491063 |
ISSN: | 25770829 , 10823654 and 10957863 |
Types: | Conference paper |
DOI: | 10.1109/NSSMIC.2010.5874500 |
ORCIDs: | Budtz-Jørgensen, Carl and Kuvvetli, Irfan |
3D position sensitive device 3D spatial resolution ASIC operation Anodes CZT crystal CZT high efficiency detector Cathodes Detectors ESA FPGA Laue lens telescope Lenses NASA Prototypes Strips Three dimensional displays X-ray apparatus X-ray astronomy application specific integrated circuits ceramic layer drift chambers drift strip detector field programmable gate arrays focal plane detectors focal planes gamma-ray astronomy hard X-ray astronomy high energy telescopes horizontal strips nuclear electronics polarimetric observation polarimetry readout electronics semiconductor counters soft gamma-ray astronomy spectroscopic imaging observation voltage divider wide band Laue lenses