title: An array of virtual Frisch-grid CdZnTe detectors and a front-end application-specific integrated circuit for large-area position-sensitive gamma-ray cameras.
abstract: We developed a robust and low-cost array of virtual Frisch-grid CdZnTe detectors coupled to a front-end readout application-specific integrated circuit (ASIC) for spectroscopy and imaging of gamma rays. The array operates as a self-reliant detector module. It is comprised of 36 close-packed 6 × 6 × 15 mm(3) detectors grouped into 3 × 3 sub-arrays of 2 × 2 detectors with the common cathodes. The front-end analog ASIC accommodates up to 36 anode and 9 cathode inputs. Several detector modules can be integrated into a single- or multi-layer unit operating as a Compton or a coded-aperture camera. We present the results from testing two fully assembled modules and readout electronics. The further enhancement of the arrays' performance and reduction of their cost are possible by using position-sensitive virtual Frisch-grid detectors, which allow for accurate corrections of the response of material non-uniformities caused by crystal defects.
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: A E
authors.initials: AE
authors.lastname: Bolotnikov
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: K
authors.initials: K
authors.lastname: Ackley
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: G S
authors.initials: GS
authors.lastname: Camarda
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: C
authors.initials: C
authors.lastname: Cherches
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Cui
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: G
authors.initials: G
authors.lastname: De Geronimo
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: J
authors.initials: J
authors.lastname: Fried
authors.affiliation: University of Texas at El Paso, El Paso, Texas 79968, USA.
authors.forename: D
authors.initials: D
authors.lastname: Hodges
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: A
authors.initials: A
authors.lastname: Hossain
authors.affiliation: Korea University, Seoul 136-855, South Korea.
authors.forename: W
authors.initials: W
authors.lastname: Lee
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: G
authors.initials: G
authors.lastname: Mahler
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: M
authors.initials: M
authors.lastname: Maritato
authors.affiliation: SUNY Binghamton, Vestal, New York 13902, USA.
authors.forename: M
authors.initials: M
authors.lastname: Petryk
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: U
authors.initials: U
authors.lastname: Roy
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: C
authors.initials: C
authors.lastname: Salwen
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: E
authors.initials: E
authors.lastname: Vernon
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: G
authors.initials: G
authors.lastname: Yang
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11793, USA.
authors.forename: R B
authors.initials: RB
authors.lastname: James