A UV sensitive integrated Micromegas with Timepix readout

作者：Melai Joost; Breskin Amos; Cortesi Marco; Bilevych Yevgen; Fransen Martin; van der Graaf Harry; Visschers Jan; Carballo Victor Blanco; Salm Cora^*; Schmitz Jurriaan

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2011, 628(1): 133-137.

DOI：10.1016/j.nima.2010.06.301

• Gaseous radiation detector
• Micromegas
• UV-photon detection
• InGrid
• CsI photocathode
• CMOS post-processing

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 6x10(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 approximately 7 lp/mm.

• 出版日期2011-2-1