Status of the development of the RICH detector for CBM including a mRICH prototype in mCBM.

The Compressed Baryonic Matter (CBM) experiment is being built at the future Facility for Antiproton and Ion Research (FAIR) next to GSI, Darmstadt, Germany. A RICH detector will provide clean and efficient electron identification in order to access di-electrons emitted from dense baryonic matter, one of the key measurements of CBM. The CBM RICH recently passed the threshold to construction with first mass production of part of the electronics. The readout electronics was developed together with the HADES experiment and is successfully operated there in the upgraded RICH detector which also makes use of approximately half of the H12700 MAPMTs of CBM. The readout electronics is also tested in a dedicated "mini-RICH" detector in the "mini-CBM" setup with prototypes of all subdetectors, however with an implementation of the full functionality of the future free-streaming readout. Besides finalizing the RICH readout, work is ongoing on full size prototypes of the RICH mirror mechanics and the photocamera including a full system test of the cooling concept. In this report, a brief update on the various developments and the status of the CBM RICH detector is given. • CBM RICH passed threshold to construction. • DiRICH based readout chain commonly developed with HADES and validated. • full size photocamera prototype including closed-loop air-cooling. • free-streaming readout developed and validated. [ABSTRACT FROM AUTHOR]