Twin shaping filter techniques to compensate the signals from CZT/CdTe detectors

Natalia Auricchio, Lorenzo Amati, Angelo Basili, Ezio Caroli, Ariano Donati, Turiddo Franceschini, Filippo Frontera, Gianni Landini, Antonella Roggio, Filomena Schiavone, John Buchan Stephen, Giulio Ventura

Research output: Contribution to journalArticlepeer-review

Abstract

A Gamma Ray Burst Monitor (GRBM) has been proposed to form part of the LOBSTER experiment, approved by ESA for a Phase A study for a future flight (2009) aboard the International Space Station (ISS). The GRBM detector would be based on CdZnTe array modules, maintained, together with the front-end electronics, at a temperature of about 250 K by using Peltier effect or passive cooling systems. To improve the detector performance several hardware (HW) and software (SW) techniques are being tested. In addition to the strip readout technique for rejecting charged particles interacting with the detector, we have investigated a method which employs a pair of active filters (one slow and one fast) to analyze differently shaped signals from the same charge sensitive preamplifier. This technique could be particularly useful for application with multi-element detection systems requiring dedicated front end and readout integrated circuits (ASICs) especially designed for the implementation of the HW correction procedure. Some experimental results are presented from the application of the biparametric technique on CdZnTe/CdTe detectors with planar and segmented electrodes in order to study the influence of the correction parameters and to verify the efficiency of the correction algorithm on groups of neighboring pixels.

Original languageEnglish
Pages (from-to)1982-1988
Number of pages7
JournalIEEE Transactions on Nuclear Science
Volume52
Issue number5 III
DOIs
Publication statusPublished - Oct 2005

Keywords

  • CdZnTe detector
  • Hard X and γ-ray
  • Shaping filters spectroscopy
  • Signal compensation technique

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

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