GLAST LAT Tracker
Download
1 / 13

GLAST LAT Tracker Delta Manufacturer Readiness Review for Tray Assembly and Test at G&A - PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on

GLAST LAT Tracker Delta Manufacturer Readiness Review for Tray Assembly and Test at G&A. Luca Latronico INFN-Pisa luca.latronico@pi.infn.it. Relevant Documents. LAT-PS-01801 Integration of TMCM and SSD Ladders onto Tracker Trays

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'GLAST LAT Tracker Delta Manufacturer Readiness Review for Tray Assembly and Test at G&A' - aya


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Glast lat tracker delta manufacturer readiness review for tray assembly and test at g a

GLAST LAT Tracker

Delta Manufacturer Readiness Review for Tray Assembly and Test at G&A

Luca Latronico

INFN-Pisa

luca.latronico@pi.infn.it


Relevant documents
Relevant Documents

LAT-PS-01801 Integration of TMCM and SSD Ladders onto Tracker Trays

released – MRB on wire-bonds encapsulation removal requires sigantures approval

LAT-PS-03534 Single Tray Electrical Test Plan

released

Production company: G&A Engineering, Carsoli-Oricola (AQ)


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)

Wire bonding (WS-B5)

Electrical tests (WS-B6)

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)

alignment jig

Assembly and test flow-chart

WS-A Material receiving

and inspection

WS-B TMCM Integration


Assembly and test flow chart1

Ladder test (WS-C1) their relative locations on the tray) + Nusil adhesives

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 mm 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-03534

DRB and shipping to INFN

Ladder assembly tools

Assembly and test flow-chart

WS-C Ladders integration

WS-D Final disposition


Availability of components and tools
Availability of components and tools their relative locations on the tray) + Nusil adhesives

  • 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 - 400 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 38+32

    • 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


Data exchange with infn pisa
Data exchange with INFN-Pisa their relative locations on the tray) + Nusil adhesives

  • 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


Tower 0 tray production
Tower 0 tray production their relative locations on the tray) + Nusil adhesives

  • 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


Metrology of ladders alignment

y their relative locations on the tray) + Nusil adhesives

x

L02

L02

L03

L01

silicon #1

silicon #2

silicon #3

silicon #4

Pin 1

Pin 3

L11

L13

L12

MCM side

L23

L21

L22

Pin 2

Pin 4

L31

L33

L32

Metrology of ladders alignment

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.


Results ladders alignment
Results – ladders alignment their relative locations on the tray) + Nusil adhesives


Functional test results leakge current
Functional test results – leakge current their relative locations on the tray) + Nusil adhesives

079MID front: 1.67 uA @ 150 V

079MID back: 1.85 uA @ 150 V

050MID front: 2.02 uA @ 150 V

050MID back: 1.77 uA @ 150 V


Functional test results trigger rates vs threshold
Functional test results – trigger rates vs threshold their relative locations on the tray) + Nusil adhesives

079MID back

079MID front

050MID front

050MID back


Functional tests results bad channels
Functional tests results – bad channels their relative locations on the tray) + Nusil adhesives

  • Total number of bad channels well within specs (16 max)

  • High reliability of PA screening test on TMCM

  • High yield of wire-bonding


Conclusions
Conclusions their relative locations on the tray) + Nusil adhesives

  • 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