Dear Johann, dear Bernhard,

I contact you concerning the HPH framework for the new H2020 program, and in particular the JRA project you are preparing on MPGD detector studies. We (IRFU institute at CEA Saclay) would like to participate to this JRA and we propose more specifically to study hybrid Micromegas and Microbulk detectors with an additional GEM foil for hadron detection at high flux. I join below a short text describing this proposal.

As you probably know we already participated to the JointGEM project during the last HP7 program, where we worked on low discharge and large size Micromegas detectors. We studied in particular discharge rate reduction with resistive Micromegas, as well as with hybrid Micromegas with GEM foil detectors. The IRFU institute has a long experience with Micromegas detectors (which were invented here !) including resistive ones, and is more and more involved on Microbulk detector studies. Our IRFU/SEDI technical laboratory in deeply involved on these studies, and has a well equipped facility to build, characterize and test bulk Micromegas detectors.

Description of the project:

Development of GEM-foil based hybrid Micromegas and Microbulk chambers for high rate detectors

Hybrid detectors coupling a Micromegas board with a pre-amplifying GEM foil are studied since a couple of years, showing very interesting characteristics in term of gain, efficiency, spatial and time resolution at high particle flux. Such detectors are presently considered for several usages in hadron physics experiments, in particular for tracking at high hadron flux, as well as for photon detection with low ion back-flow. Also applications like high flux TPC could take a large benefit of such detectors.

The goal of this project is to study hybrid detectors based on resistive Micromegas boards and Microbulk boards, associated with a unique GEM or thickGEM foil, in view of development of large tracking detectors working at high rate, and TPC at high rate with low ion back-flow detectors. Several prototypes of tracking detectors will be produced and characterized in high flux hadron beam environment, in order to optimize the structure of the hybrid detector for such application. A TPC prototype will also be produced and studied in order to evaluate and optimize hybrid detection for this application. Deliverables of this task will consist in scientific papers describing prototypes and works done, as well as performances of these prototypes.

Do not hesitate to contact me if you have comments or need more information about this project. I would be happy to participate to the writing of that part for the JRA proposal.

With my best regards

Damien Neyret

-- BernhardKetzer - 11 Feb 2014

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