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Proceedings Paper

Characterization of a photon-counting ICCD prototype
Author(s): Paolo Bergamini; Giuseppe Bonelli; Luca Poletto; Enrico G. Tanzi; Michela C. Uslenghi; Giuseppe Tondello
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Paper Abstract

The result obtained in the course of the characterization of a photon-counting ICCD prototype. The detector consists of a 40 mm diameter, Z stack, high gain microchannel plate intensifier, endowed with a RbTe photocathode. The intensifier electron cascade is transduced, via a phosphor screen and a 1:3.6 fiber optics reducer, into a 3 by 3 pixel, quasi-gaussian charge distribution on a 512 by 512 pixel format CCD matrix with square pixels of 15 micrometers . The CCD is read out, in the frame-transfer mode, through a single output amplifier at a frequency of 20 MHz. The data flow is acquired serially and fed to a virtual shift- register system, as to generate a 3 by 3 pixel even sash that sweeps dynamically the CCD matrix at the 50 ns clock pace. Each and every events has is searched for the presence of events whose integral charge distribution lie within set threshold levels, and satisfy given morphological rules, i.e. a single-peaked charge profile. The centroid coordinates of identified events are then determined with sub-pixel accuracy and subsequently stored in an external, high resolution memory. Detective quantum efficiency, spatial resolution and dynamic range obtained for the prototype system in the 150-600 nm spectral domain, are given and discussed, together with the up-graded performance expected for a second-generation prototype, presently being assembled.

Paper Details

Date Published: 10 November 1998
PDF: 10 pages
Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); doi: 10.1117/12.330327
Show Author Affiliations
Paolo Bergamini, Istituto di Fisica Cosmica G. Occialini (Italy)
Giuseppe Bonelli, Istituto di Fisica Cosmica G. Occialini (Italy)
Luca Poletto, INFM Unita di Padova (Italy) and Univ. di Padova (Italy)
Enrico G. Tanzi, Istituto di Fisica Cosmica G. Occialini (Italy)
Michela C. Uslenghi, Istituto di Fisica Cosmica G. Occialini (Italy)
Giuseppe Tondello, INFM Unita di Padova (Italy) and Univ. di Padova (Italy)


Published in SPIE Proceedings Vol. 3445:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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