Large-area submillimeter resolution CdZnTe strip detector for astronomy
James M. Ryan,John R. Macri,Mark L. McConnell,Brian K. Dann,Michael Cherry,T. Gregory Guzik,F. Patrick Doty,Boris Apotovsky,Jack F. Butler +8 more
- 01 Sep 1995
- Vol. 2518, pp 292-301
TL;DR: In this article, the first performance measurements of a sub-millimeter CdZnTe strip detector developed as a prototype for space-borne astronomical instruments were reported, which can provide two-dimensional position resolution with fewer electronic channels than pixellated arrays.
read more
Abstract: We report the first performance measurements of a sub-millimeter CdZnTe strip detector developed as a prototype for space-borne astronomical instruments. Strip detector arrays can be used to provide two-dimensional position resolution with fewer electronic channels than pixellated arrays. Arrays of this type and other candidate technologies are under investigation for the position-sensitive backplane detector for a coded-aperture telescope operating in the range of 30 - 300 keV. The prototype is a 1.4 mm thick, 64 multiplied by 64 stripe CdZnTe array of 0.375 mm pitch in both dimensions, approximately one square inch of sensitive area. Pulse height spectra in both single and orthogonal stripe coincidence mode were recorded at several energies. The results are compared to slab- and pixel-geometry detector spectra. The room-temperature energy resolution is less than 10 keV (FWHM) for 122 keV photons with a peak-to-valley ratio greater than 5:1. The response to photons with energies up to 662 keV appears to be considerably improved relative to that of previously reported slab and pixel detectors. We also show that strip detectors can yield spatial and energy resolutions similar to those of pixellated arrays with the same dimensions. Electrostatic effects on the pulse heights, read-out circuit complexity, and issues related to design of space borne instruments are also discussed.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Review of the Shockley–Ramo theorem and its application in semiconductor gamma-ray detectors
TL;DR: In this paper, the authors reviewed the Shockley-Ramo theorem based on the conservation of energy and showed how the energy is transferred from the bias supplies to the moving charge within a device.
Applications of semiconductor detectors to nuclear medicine
TL;DR: In this article, the development of semiconductor detectors is applied to improving the resolution and imaging performance of nuclear medicine cameras for both planar and tomographic imaging, and an overview of the progress in this area is presented.
58
A "Winner-Take-All" IC for determining the crystal of interaction in PET detectors
TL;DR: In this article, the winner-take-all (WTA) CMOS integrated circuit is used with a pixel-based PET detector module. But the performance of the WTA circuit is limited.
Signal generation in CdZnTe strip detectors
Louis-Andre Hamel,John R. Macri,Carl Michael Stahle,J. Odom,F. Birsa,Peter K. Shu,F.P. Doty +6 more
- 21 Oct 1995
TL;DR: In this article, the free carrier density distributions following the absorption of a /spl gamma/ray are calculated by solving the continuity equations, combined with the strip weighting field, this provides the signal induced in the strip.
31
Three-dimensional imaging and detection efficiency performance of orthogonal coplanar CZT strip detectors
Mark L. McConnell,John R. Macri,James M. Ryan,K. Larson,Louis-Andre Hamel,G. Bernard,C. Pomerleau,O. Tousignant,Jean-Charles Leroux,Valentin T. Jordanov +9 more
- 21 Nov 2000
TL;DR: In this paper, the authors report on recent three-dimensional imaging performance and detection efficiency measurements obtained with 5 mm thick prototype CdZnTe detectors fabricated with orthogonal coplanar anode strips.
References
Charge transport in arrays of semiconductor gamma-ray detectors.
TL;DR: The effects of electrode size on performance of arrays of semiconductor gamma-ray detectors, especially when there is significant charge trapping, are analyzed.
536
Properties of CdZnTe crystals grown by a high pressure Bridgman method
TL;DR: In this article, CdZnTe crystals have been grown over the full range of alloy composition by a high-pressure Bridgman (HPB) method using inert gas over pressure.
185
Pixellated CdZnTe detector arrays
F.P. Doty,H.B. Barber,F.L. Augustine,Jack F. Butler,Boris Apotovsky,E.T. Young,W. J. Hamilton +6 more
TL;DR: In this article, the first high spatial resolution room-temperature semiconductor gamma detector arrays with 125 μm element pitch have been reported, including pulse height spectra using charge-sensitive preamplifier readout from witness test pixels.
77
Development of CdZnTe energy selective arrays for industrial and medical radiation imaging
TL;DR: In this article, a number of linear and areal monolithic arrays were fabricated using vacuum deposited contacts on CdZnTe material with good success, and they operate in a pulse counting mode using hybrid and surface mount circuitry mounted in close proximity to the arrays Linear devices with pitches of less than 08 mm and with 32 elements per substrate were used for very wide dynamic range radioscopy with excellent results.
32
X-ray and gamma-ray imaging with monolithic CdZnTe detector arrays
TL;DR: In this paper, CdZnTe crystals useful for room temperature x-ray astronomy detectors have been developed and shown to have uniform response and good energy resolution in the 3 to 300 keV range for large area detectors and monolithic arrays.
18