First functionality tests of a 64 x 64 pixel DSSC sensor module connected to the complete ladder readout

Donato, Mattia; Porro, Matteo; Hansen, Karsten; Kalavakuru, Pradeep; Kirchgessner, Manfred; Reckleben, Christian; Turcato, Monica; Kuster, Markus

Preprint/Report

PUBDB-2017-00572

First functionality tests of a 64 x 64 pixel DSSC sensor module connected to the complete ladder readout

Donato, M. (Corresponding author)XFEL.EU* ; Hansen, K.DESY* ; Kalavakuru, P.DESY* ; Kirchgessner, M.Extern* ; Kuster, M.XFEL.EU* ; Porro, M.XFEL.EU* ; Reckleben, C.DESY* ; Turcato, M.XFEL.EU*

2017

[10.3204/PUBDB-2017-00572]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2017-00572

Report No.: arXiv:1701.03613

Abstract: The European X-ray Free Electron Laser (XFEL.EU) will provide every 0.1 s a train of 2700 spatially coherent ultrashort X-ray pulses at 4.5 MHz repetition rate. The Small Quantum Systems (SQS) instrument and the Spectroscopy and Coherent Scattering instrument (SCS) operate with soft X-rays between 0.5 keV - 6keV. The DEPFET Sensor with Signal Compression (DSSC) detector is being developed to meet the requirements set by these two XFEL.EU instruments. The DSSC imager is a 1 mega-pixel camera able to store up to 800 single-pulse images per train. The so-called ladder is the basic unit of the DSSC detector. It is the single unit out of sixteen identical-units composing the DSSC-megapixel camera, containing all representative electronic components of the full-size system and allows testing the full electronic chain. Each DSSC ladder has a focal plane sensor with 128 x 512 pixels. The read-out ASIC provides full-parallel readout of the sensor pixels. Every read-out channel contains an amplifier and an analog filter, an up-to 9 bit ADC and the digital memory. The ASIC amplifier have a double front-end to allow one to use either DEPFET sensors or Mini-SDD sensors. In the first case, the signal compression is a characteristic intrinsic of the sensor; in the second case, the compression is implemented at the first amplification stage. The goal of signal compression is to meet the requirement of single-photon detection capability and wide dynamic range. We present the first results of measurements obtained using a 64 x 64 pixel DEPFET sensor attached to the full final electronic and data-acquisition chain.

Note: Preprint proceeding for IWORID 2016, 18th International Workshop on Radiation Imaging Detectors, 3rd-7th July 2016, Barcelona, Spain

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