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A Digital Readout Scheme for Arrays of Microcalorimeter X-Ray Detectors
Published online by Cambridge University Press: 02 July 2020
Extract
While the performance of single-pixel microcalorimeter x-ray detectors has been shown to be very useful for microanalysis1, arrays of microcalorimeters will have a further impact on energy dispersive spectroscopy (EDS) by providing higher total count rates and larger effective areas. We are developing a system with a 32x32 pixel array with a total area of 40 mm2 and with a total count rate between 105 and 106 s-1. One of the challenges in constructing an array-based system will be the readout electronics.
In a typical microcalorimeter EDS setup, shown in Fig. 1, the microcalorimeter is readout using a cryogenic amplifier (SQUID system) and analog feedback electronics to control the SQUID. The signal from the room-temperature SQUID electronics is either attached to a spectroscopy-grade shaping amplifier and MCA for real-time analog signal processing or attached to a digitizer for optimal pulse processing.
- Type
- New Detectors—Benefits and Drawbacks
- Information
- Microscopy and Microanalysis , Volume 6 , Issue S2: Proceedings: Microscopy & Microanalysis 2000, Microscopy Society of America 58th Annual Meeting, Microbeam Analysis Society 34th Annual Meeting, Microscopical Society of Canada/Societe de Microscopie de Canada 27th Annual Meeting, Philadelphia, Pennsylvania August 13-17, 2000 , August 2000 , pp. 742 - 743
- Copyright
- Copyright © Microscopy Society of America
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