An integrated Micromegas UV-photon detector
arXiv:1003.1971 · doi:10.1016/j.nima.2010.06.165
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.
5 pages with 6 figures. This paper is submitted to Nuclear Instruments and Methods A (Elsevier) for the proceedings of IWORID 2009.