A UV Sensitive Integrated Micromegas with Timepix Readout

Details A UV Sensitive Integrated Micromegas with Timepix Readout A UV Sensitive Integrated Micromegas with Timepix Readout

2010-03-10

arxiv.org/abs/1003.2083v1

Physics

Instrumentation and Detectors

4 pages with 8 figures. Submitted to Nucl. Instr. and Meth. A (Elsevier) for proceedings of VCI 2010.

Scientific paper

This article presents a detector system consisting of three components, a CMOS imaging array, a gaseous-detector structure with a Micromegas layout and a UV-photon sensitive CsI reflective photocathode. All three elements have been monolithically integrated using simple post-processing steps. The Micromegas structure and the CMOS imaging chip are not impacted by the CsI deposition. The detector operated reliably in He/isobutane mixtures and attained charge gains with single photons up to a level of 6 \cdot 10^4. The Timepix CMOS array permitted high resolution imaging of single UV-photons. The system has an MTF50 of 0.4 lp/pixel which corresponds to app. 7 lp/mm.

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