27 June 2021 to 1 July 2021
Online
Europe/Brussels timezone

Calibration of a pnCCD Detector at European XFEL

Not scheduled
20m
Gather.town (Online)

Gather.town

Online

Poster presentation only Front end electronics and readout Poster session 2

Speaker

Dr Kiana Setoodehnia (European XFEL GmbH)

Description

A 450 um-thick, fully depleted, backside illuminated, 1-Megapixel pnCCD detector with a 1024 * 1024-pixel format (pixel size: 75 * 75 um^2) has been installed and commissioned for imaging and spectroscopy applications at the Small Quantum Systems (SQS) instrument of the European X-ray Free Electron Laser (Eu.XFEL) facility [1].

The SQS instrument is operating at an energy range of 0.5 – 3 keV. However, the detector can handle photon energy of 0.3 – 25 keV with quantum efficiency of 80% or higher for 0.7 <= Eg <= 12 keV. This detector enables single photon imaging due to its very low noise of 3e– (highest gain) and can also detect up to 1500 photons per pixel (lowest gain). Our detector offers three operation modes with different bias voltages and 7 gains per mode. The mode of operation could be chosen per requirements for different experimental scenarios. Two of the operation modes have been calibrated using flat-field illumination of the detector and an aluminium target for fluorescence imaging at 1.5 keV.

Our pnCCD detector can also be used for spectroscopic measurements. We are currently analyzing data taken using Xe gas bombarded by 0.9 keV, 1.2 keV and 1.5 keV X-rays, and the results are promising.

My presentation focuses on a summary of the calibration and characterization of the pnCCD detector at Eu.XFEL.

[1] M. Kuster et al., J. Synchrotron Rad. 28 (2021), 576 – 587.

Primary authors

Dr Kiana Setoodehnia (European XFEL GmbH) Dr Michael Meyer (European XFEL)

Co-authors

Dr Robert Hartmann (PNSensor) Dr David Lomidze (European XFEL) Mr Karim Ahmed (European XFEL) Dr Rebecca Boll (European XFEL) Dr Simon Dold (European XFEL) Dr Markus Kuster (European XFEL) Dr Yevheniy Ovcharenko (European XFEL) Prof. Lothar Strueder (PNSensor) Dr Hazem Yousef (European XFEL)

Presentation materials

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