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An integrated Micromegas UV-photon detector

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arxiv 1003.1971 v1 pith:DEC7VBDR submitted 2010-03-09 physics.ins-det

Joost Melai , Alexey Lyashenko , Amos Breskin , Harry van der Graaf , Jan Timmermans , Jan Visschers , Cora Salm , Jurriaan Schmitz This is my paper
classification physics.ins-det
keywords photocathodedetectorimagingingridintegratedmicromegasmultiplieraimed
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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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