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.
@article{arxiv.1003.1971,
title = {An integrated Micromegas UV-photon detector},
author = {Joost Melai and Alexey Lyashenko and Amos Breskin and Harry van der Graaf and Jan Timmermans and Jan Visschers and Cora Salm and Jurriaan Schmitz},
journal= {arXiv preprint arXiv:1003.1971},
year = {2015}
}
Comments
5 pages with 6 figures. This paper is submitted to Nuclear Instruments and Methods A (Elsevier) for the proceedings of IWORID 2009.