Tracker Subsystem1 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 GLAST LAT Tracker Delta Manufacturer Readiness Review for Tray Assembly and Test at G&A Luca Latronico INFN-Pisa

Tracker Subsystem2 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Relevant Documents LAT-PS-01801Integration of TMCM and SSD Ladders onto Tracker Trays released LAT-PS-03534Single Tray Electrical Test Plan released Production company: G&A Engineering, Carsoli-Oricola (AQ)

Tracker Subsystem3 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 alignment jig Assembly and test flow-chart INFN provides G&A with tray panels, TMCMs, ladders, (and their relative locations on the tray) + Nusil adhesives Alignment jig (WS-B1) provides: –TMCM planarity –Pitch adapter planarity –Bonding pads alignment (HV and shield pads) –Dry assembly test to check TMCM connectors clearance Adhesive distribution (WS-B2) Assembly of TMCM onto tray (WS-B3) Metrology (WS-B4) Current production rate ramping up: –need to match CC pocket and MCM connector depth –extra screening on TMCM pitch adapter (missing connections on signal strips and HV lines – PA debondings) WS-A Material receiving and inspection WS-B TMCM Integration

Tracker Subsystem4 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Assembly and test flow-chart Ladder test (WS-C1) Tray Z positioning under CMM (WS-C2) –  50  m wrt nominal position Ladder positioning on the bridges (WS-C3) –Alignment from bridge itself used as reference and excellent alignment of SSD inside ladder (~2  m RMS) Glue deposition (WS-C4) –19 spots of siliconic glue/SSD –4 spots conductive glue + 1 unbroken line across ladders Ladder assembly (WS-C5) Ladder metrology (WS-C6) –Ladder height 0.25  0.1 mm –Ladders relative parallelism of 0.1 mm Wire bonding (WS-C6) –Destructive pull tests on coupons (>5g each) –Visual inspection Functional test by INFN with tray inside box –LAT-PS DRB and shipping to INFN WS-C Ladders integration WS-D Final disposition Ladder assembly tools

Tracker Subsystem5 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Availability of components and tools Bare panel trays after TVAC test in Roma2 –27 trays available – planned supply is 4trays/day SSD Ladders from G&A and Mipot –~1400 ladders available more from G&A (200 to test, 200 being built) – 900 will be built from Mipot asap MCM from SLAC through quick functional verification at INFN-Pisa –Currently –Could match 14 trays (26 TMCMs) from first lot of 38 because of connector stick-out issue –6 TMCMs sent back to SLAC for PA debondings Nusil at G&A for ~3/4 of tray production G&A tools –TMCM alignment tools: 5 –Ladder integration tools (tray alignment + ladder bridges): 6 –CMM: 2 (1 for alignments, 1 for metrology) –Glue dispenser: 2 –wire-bonder: 2 –2 working shifts per day to grant production rate of 4 trays/day EGSE for functional tests –1 full EGSE system installed at G&A and operated by INFN

Tracker Subsystem6 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 From INFN to GA: –List of subparts (ladders and TMCM) from INFN-Pisa From GA to INFN: –List of subparts with G&A reference SNs (neede for tray box) –Progress of assembly (weekly) Quality Assurance –Rely on G&A certified QA program for internal activity –Handle major NCR notified from G&A (MARECO) with Pisa system Data exchange with INFN-Pisa

Tracker Subsystem7 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Tower 0 tray production 14 complete trays assembled (27 TMCMs and SSD Ladder planes) –23 Si layers were within specs –4 Si layers had short for problems related to bias circuit delamination All went through thermal tests –4 Si layers (bottom side of heavy trays) had many disconnected channels because of CTE mismatch impact on wire-bond encapsulation  MRB on wire-bond encapsulation 23 SSD layers operated successfully up to now

Tracker Subsystem8 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Metrology: with a CMM with interchangeable mechanical-optical heads, the positions of 12 “C” markers, 3 for each ladders, and the positions of the MCM alignment pins are measured on both sides of the tray. Metrology of ladders alignment

Tracker Subsystem9 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Results – ladders alignment

Tracker Subsystem10 GLAST LAT Project TRAY DELTA MRR, 18 Nov., MID front: V079MID back: V 050MID front: V050MID back: V Functional test results – leakge current

Tracker Subsystem11 GLAST LAT Project TRAY DELTA MRR, 18 Nov., MID front050MID back 079MID back 079MID front Functional test results – trigger rates vs threshold

Tracker Subsystem12 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 MCMDisconected at SLACDisconnected at G&A 365 (079 MID Front)Total 8 – ch1227 false positive at PA test 1222, 1224, 1226, 1227, 1228, 1229, 1231, Total , 1224, 1226, 1228, 1229, 1231, (079 MID Back)Total (050 MID Front)Total 0Total 1 – ch0 false negative? (050 MID Back)Total 3 49, 50, 1031 Total 4 – ch1031 false positive, ch51 false negative? 49, 50, 51, Functional tests results – bad channels Total number of bad channels well within specs (16 max) High reliability of PA screening test on TMCM High yield of wire-bonding

Tracker Subsystem13 GLAST LAT Project TRAY DELTA MRR, 18 Nov., 2004 Conclusions Assembly and test procedures well tuned and tested on EM trays and tower 0 G&A moving rapidly to planned production rate High yield of assembly so far –> 100 ladders glued and wire-bonded with no failures and well within specs Tower A production well within specs –Leakage current –Noise and thresholds performance –Bad channels