Micromegas Bulk Demonstrator One type of Bulk: Active area; 115 mm for 288 strips, 500 mm long Material: 100 µm PCB, 5 µm Cu, 18µm mesh, 20µm Mylar Two type of structure, X and Y, for Bulk integration: Cylindrical for Y: ext: 220 mm Tile for X: int 180 mm One support for up to 3 X tiles and 3 Y cylinders: Channels: 1728 read by AFTER ASIC (T2K) Active area: 0.34 m² Dead zone between detectors not optimized on the prototype !!! Y cylinder X tile Support structure
Y cylinder X tile Y connector Y HT cable Y joint Interface attachment to handcart Length: 600 mm Diameter: 180 / 220 mm Magnet interface (3 Teflon pads) Cylindrical prototype Cylindrical Prototype
Out In The prototype is fixed on a mobile cart (telescopic slide rail) itself fixed on the magnet. The handcart allows full test in and out without dismounting the detector. Will be used for future 5T with DVCS magnet. 400 mm Prototype « cart »
View with interface Electronics box detector HT filter Gas distribution DVCS magnet Telescopic slide rail Prototype inside CLAS+DVCS magnet
Goals: Dry test for test beam end 2008: full prototype on handcart Lorentz 5T: one X tile with UV laser Cosmic 5T: Three X tiles. Goals: Beam test: full cylindrical prototype on cart Beam test: Forward prototype 2000-channel tests #1 and 2 1. During summer 2008, 5T test inside DVCS solenoid: 2. During change-out between e1-dvcs and eg1-dvcs(?), beam test:
Bulk made at CERN Flat test in Saclay Cylindrical drift & test in March Proto #2 to #4 under realization Detail view During Bulk realization Prototype #1 : realization (Jan.-Feb. 2008)
First Mesh test successful in air and gas Electronics test early march 300 µm Cu strips First flat test Prototype #1 : first tests at Saclay (Feb. 2008)
Monday Feb. 18th : Drift Al-mylar electrode laying (pillars implantation) v1 mechanical structure just arrived for laying/implantation studies Prototype #1 : Y Cylinder
FeasabilityDefinitionDevelopmentProductionExperiment ABCDE Project Decision (Si and/or MM) Milestones Preliminary Design Review Production Readiness Review 2k-ch. v1 PrototypingForward CLAS12 2k-ch. v2 + elec. + DAQ B Final Design Review now 0809 Beam test5T test1.5T test now planning