High-speed readout of high-Z pixel detectors with the LAMBDA detector

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Published 4 December 2014 © 2014 IOP Publishing Ltd and Sissa Medialab srl
, , 10th International Conference on Position Sensitive Detectors Citation D. Pennicard et al 2014 JINST 9 C12014 DOI 10.1088/1748-0221/9/12/C12014

1748-0221/9/12/C12014

Abstract

High-frame-rate X-ray pixel detectors make it possible to perform time-resolved experiments at synchrotron beamlines, and to make better use of these sources by shortening experiment times. LAMBDA is a photon-counting hybrid pixel detector based on the Medipix3 chip, designed to combine a small pixel size of 55 μm, a large tileable module design, high speed, and compatibility with ``high-Z'' sensors for hard X-ray detection. This technical paper focuses on LAMBDA's high-speed-readout functionality, which allows a frame rate of 2000 frames per second with no deadtime between successive images. This takes advantage of the Medipix3 chip's ``continuous read-write'' function and highly parallelised readout. The readout electronics serialise this data and send it back to a server PC over two 10 Gigabit Ethernet links. The server PC controls the detector and receives, processes and stores the data using software designed for the Tango control system. As a demonstration of high-speed readout of a high-Z sensor, a GaAs LAMBDA detector was used to make a high-speed X-ray video of a computer fan.

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10.1088/1748-0221/9/12/C12014