Speaker
Description
Progress of the Picosec Micromegas concept towards a particle detector with a restive and segmented readout Detectors with a time resolution of several 10 ps and robustness under higher particles flux are necessary for a accurate vertex separation in future HEP experiments. The Picosec detector concept is a Micro-Pattern Gaseous Detector (MPGD) based solution facing this particular problem. The Picosec concept is based on a Micromegas MPGD coupled with a Cherenkov radiator and a photocathode. The feasibility of this concept to reach a time resolution in the order of several 10 ps has been demonstrated with a measured time resolution of up to 24 ps. The next step is to further develop this concept towards a usable device for precise time and position measurements in high flux environments. To archive this goal several prototypes have been build and tested. Different kinds of restive layers has been tested to operate the detector stable under a high intensity pion beam. With the additional protective layer a time resolution of up to 28 ps has been obtained. Different types of photocathode materials have been tested in order to find a robust solution against ion back flow bombardment under higher particle flux. Moreover a first prototype has been tested with a hexagonal segmented anode pads. With this detector a combined time resolution of 36 ps for shared signals over multiple pads has been measured. This conference contribution will show the progress and development of the well-proven Picosec concept towards a durable and precise tracking detector targeting for the HL-LHC era and beyond.
