Investigation of a resistive anode detector for astronomical spectroscopy

[摘要] A large format two dimensional photon counting detector hasbeen evaluated as a detector for astronomical spectroscopy. Thedesign comprises an 320 photocathode, a tandem MCP gain stage and acircular arc terminated resisitive anode to provide pOSitionalcoordinates of detected events. The system is run from an LSI 11/23computer operating under FORTH control.The micro-channel plate operating characteristics and thedetector's resolution, quantum efficiency and imaging performancehave been studied. The principal areas requiring design improvementare found to be the micro-channel plate gain,processing and photocathode quality.electronic signalThe detector has been employed in a observing program on a0.5 m telescope. Spectra of IAU faint radial velocity standards andthe eclipsing binary system s-l Cam have been obtained and analysedto assess the system's performance.

[发布机构] University:University of St Andrews;Department:Physics & Astronomy (School of)