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arXiv · 1003.2083

A UV Sensitive Integrated Micromegas with Timepix Readout

Joost Melai·Amos Breskin·Marco Cortesi·Yevgen Bilevych·Martin Fransen·Harry van der Graaf·Jan Visschers·Victor Blanco Carballo·Cora Salm·Jurriaan Schmitz
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Abstract

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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Joost Melai, Amos Breskin, Marco Cortesi, Yevgen Bilevych, Martin Fransen, Harry van der Graaf, Jan Visschers, Victor Blanco Carballo, Cora Salm, Jurriaan Schmitz. 2010-03-10. A UV Sensitive Integrated Micromegas with Timepix Readout. https://doi.org/10.1016/j.nima.2010.06.301

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