GLAST LAT ProjectMarch 24, 2003 6F Tracker Peer Review, WBS 4.1.4 1 GLAST Large Area Telescope: Tracker Subsystem WBS 4.1.4 6F: Tray assembly A. Brez I.N.F.N.

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Presentation transcript:

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS GLAST Large Area Telescope: Tracker Subsystem WBS F: Tray assembly A. Brez I.N.F.N. Pisa Gamma-ray Large Area Space Telescope

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS MCM Assembly on Trays and Test (INFN) Procedure doc: LAT-PS MCM incoming test: Read out tests Noise level Noisy channels HV test MCM assembly with glue and screws Scotchweld 2216 A/B gray Glue thickness.1mm Pattern of glue lines to avoid air trapping Area occupancy ∼ 50% ⇨ Δt ≲ C MCM final test: Read out tests Noise level Noisy channels HV test The tray is put in the tray-storage box and is delivered to the ladder assembly center

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS Integration of SSD Ladders onto Tracker Trays Assembly in G&A Engineering Assembling steps Tray position study, Z adjustment The ladders are aligned on the alignment jig The ladders are vacuum kept by the bridges The glue drops are deposited on the tray The tray is placed again on the tool The ladders are positioned on the tray by means of the bridges Glue cure (at RT for more than 6 hours) Ladder metrology Microbonding MCMs fast test to check bondings Encapsulation The tray is placed in the tray-storage box for delivery to test labs Tray position study, Z adjustment The ladders are aligned on the alignment jig The ladders are vacuum kept by the bridges The glue drops are deposited on the tray The tray is placed again on the tool The ladders are positioned on the tray by means of the bridges Glue cure (at RT for more than 6 hours) Ladder metrology Microbonding MCMs fast test to check bondings Encapsulation The tray is placed in the tray-storage box for delivery to test labs Procedure doc: LAT-PS-01801

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS The tools Jig of ladders alignment Ladders vacuum kept on the bridges Jig of tray alignment Reference dowels Alignment micrometers C.M.M. with touch head and optical head All the assembly operations under C.M.M. Glue spots deposition with automatic dispenser Microbonding with automatic wedge bonder

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS Assembly phases Tray positioning Ladder positioning Microbonding 1 assembly chain ready 5 assembly chains in construction Max assembly rate : 15 trays/week Foreseen assembly rate: 10 trays/week

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS Connector savers Fixation screws The tray storage box This robust Aluminum box allows safe and clean shipping. The tray can be tested in the closed box, connecting the MCMs through the connector savers. Connector saver protections

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS First results  =14  m Planarity Requirements: Alignment error < 40  m Planarity 100  m

GLAST LAT ProjectMarch 24, F Tracker Peer Review, WBS Conclusions The tray assembly has been successfully tested: the alignment and planarity of the ladders are in specification with possible improvements. The number of tools in production will allow an assembly rate of 40 trays/month (2 towers/month) that well matches with the test rate of the trays and towers.