SPAN: a novel high-speed high-resolution position readout

Jonathan S. Lapington; A. A. Breeveld; Michael L. Edgar; J. A. Tandy; Matthew W. Trow

doi:10.1117/12.23260

1 November 1990 SPAN: a novel high-speed high-resolution position readout

Jonathan S. Lapington, A. A. Breeveld, Michael L. Edgar, J. A. Tandy, Matthew W. Trow

Proceedings Volume 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy; (1990) https://doi.org/10.1117/12.23260
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

The concept for the 2D position-readout device for the SPAN photon-counting detector is presented with attention to the count rates, spatial resolution, and charge-measurement precision. The electrodes which are deposited on the planar substrate result from charge division induced by a charge cloud, the centroid position of which is encoded by the ratio of charge magnitudes. The SPAN electrode design is analyzed and theorized to permit 1000 x 1000-pixel resolution at 1 MHz. The SPAN spiral-anode six-electrode design is compared to the Vernier-anode twelve-electrode structure for encoding 2D position, and digital precision is analyzed at count rates up to 1 MHz. The SPAN readout affords resolution levels of up to 1/1000 across the entire active area at 8-bit digitization.

Citation Download Citation

Jonathan S. Lapington, A. A. Breeveld, Michael L. Edgar, J. A. Tandy, and Matthew W. Trow "SPAN: a novel high-speed high-resolution position readout", Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); https://doi.org/10.1117/12.23260

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