<title>Progress in the development of large-area submillimeter-resolution CdZnTe strip detectors</title>

Abstract

We report progress in ongoing measurements of the performance of a sub-millimeter pitch CdZnTe strip detector developed as a prototype for astronomical instruments. Strip detectors can be used to provide twodimensional position resolution with fewer electronic channels than pixellated arrays. Arrays of this type are under development for the position-sensitive image plane detector for a coded-aperture telescope operating in the hard x-ray range of 20-200 keV. The prototype is a 1 .5 mm thick, 64 x 64 orthogonal stripe CdZnTe detector of 0.375 mm pitch in both dimensions, approximately one square inch of sensitive area. In addition to energy and spatial resolution capabilities, as reported last year, we demonstrate the imaging capabilities and discuss uniformity of response across an 8 x 8 stripe, 64 "pixel", segment of detector. A technique for determination of the depth of photon interaction is discussed and initial results related to depth determination are presented. Issues related to the design and development of readout electronics, the packaging and production of strip detectors and the production of compact strip detector modules, including detector and readout electronics, are also discussed.

<title>Charge-coupled devices with fast timing for astrophysics and space physics research</title>

“…The actual row position is the average If there are grows rows, then the time to read out the entire array is grows trow ( 15 msec for the case of a 5 1 2 x 512 array clocking vertically every 30 sec). The flux must be sufficiently low that the chances of seeing more than one event per two adjacent columns per full-frame readout time is small: F< (5) 2n0 d2 trow where d is the pixel size. (For d = 5O.tm in the example above, the limiting flux is then 3 x iO X-rays cm2 sec.…”