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arXiv · 1003.1971

An integrated Micromegas UV-photon detector

Joost Melai·Alexey Lyashenko·Amos Breskin·Harry van der Graaf·Jan Timmermans·Jan Visschers·Cora Salm·Jurriaan Schmitz
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Abstract

Preliminary results of a photon detector combining a Micromegas like multiplier coated with a UV-sensitive CsI photocathode are described. The multiplier is made in a CMOS compatible InGrid technology, which allows to post-process it directly on the surface of an imaging IC. This method is aimed at building light-sensitive imaging detectors where all elements are monolithically integrated. We show that the CsI photocathode deposited in the InGrid mesh does not alter the device performance. Maximum gains of ~6000 were reached in a single-grid element operated in Ar/CH4, with a 2% Ion Back Flow fraction returning to the photocathode.

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Joost Melai, Alexey Lyashenko, Amos Breskin, Harry van der Graaf, Jan Timmermans, Jan Visschers, Cora Salm, Jurriaan Schmitz. 2010-03-09. An integrated Micromegas UV-photon detector. https://doi.org/10.1016/j.nima.2010.06.165

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