Development of a 3D CZT detector prototype for Laue Lens telescope

Ezio Caroli, Natalia Auricchio, Stefano Del Sordo, Leonardo Abbene, Carl Budtz-Jørgensen, Fabio Casini, Rui M. Curado da Silva, Irfan Kuvvetli, Luciano Milano, Lorenzo Natalucci, Egidio M. Quadrini, John B. Stephen, Pietro Ubertini, Massimiliano Zanichelli, Andrea Zappettini

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We report on the development of a 3D position sensitive prototype suitable as focal plane detector for Laue lens telescope. The basic 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 side is segmented in 64 strips, that divide the crystal in 8 independent sensor (pixel), each composed by one collecting strip and 7 (one in common) adjacent drift strips. The drift strips are biased by a voltage divider, whereas the anode strips are held at ground. Furthermore, the cathode is divided in 4 horizontal strips for the reconstruction of the third interaction position coordinate. The 3D prototype will be made by packing 8 linear modules, each composed by one basic sensitive unit, bonded on a ceramic layer. The linear modules readout is provided by a custom front end electronics implementing a set of three RENA-3 for a total of 128 channels. The front-end electronics and the operating logics (in particular coincidence logics for polarisation measurements) are handled by a versatile and modular multi-parametric back end electronics developed using FPGA technology.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)77420V
Publication statusPublished - 2010
EventHigh Energy, Optical, and Infrared Detectors for Astronomy - San Diego, California United States
Duration: 1 Jan 2010 → …
Conference number: 4


ConferenceHigh Energy, Optical, and Infrared Detectors for Astronomy
CitySan Diego, California United States
Period01/01/2010 → …


  • 3D imaging
  • CZT detector
  • Drift strip
  • Gamma ray spectroscopy
  • Hard X- and soft gamma-ray astronomy


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