Tracker Status
July 9, 2004
Tower Alignment
- The
alignment program was successfully developed at SLAC last week.
- This week
the program is was tested in Pisa.
Tower-A Mid Tray Panels
- ASTM
coupon tests were done to characterize the peel strength of the
3M-2216 adhesive versus temperature and
showed no issue up to well
above 55C.
-
Tungsten-Kapton coupons were made and tested with various surface
preparations. Bead blasting showed a factor of 2.5 increase in
peel strength compared with the previous
technique and also gave
much better uniformity to the bond.
- Bead
blasting of all the tungsten plates will be done next week.
Top/Bottom Tray Panels
- The
Tower-A panel was fabricated and measured.
The metrology
procedure was improved this week and
measurements will be repeated
Monday.
- The
closeouts for the top tray were machined.
MCMs
- 45 flight
MCMs were reworked at Zentek and tested at SLAC. None of
them showed any problems with register
readback after the rework,
including tests at -30C. These will go to Pisa Monday.
- Improved
pitch adapters are in production, finally, with 50 due next
week.
Tray Assembly (MCM and ladder integration)
- The
complete process was finalized. One
last change was made, to add
nuts to the grounding pins to make good
ground contact of the pin to
the front side of the MCM.
- MCMs and
ladders were mounted on the first two flight trays. They
will be wire bonded over the weekend and
tested Monday.
Flex-Circuit Cables
- 2 sets of
flight cables were delivered to INFN.
- 6 EGSE
cables were also delivered to Pisa, along with connector savers.
Heat straps
- The
Tower-A set is in work in the SLAC shop and should be completed
today.
Interface Hardware
- Enough
studs, cones, hex bushings and nuts were procured for Tower A.
MGSE
- The cable
holding plate is in fabrication and due today.
- The
lifting fixture should be completed today and tested tomorrow.
- The inner
shipping container is in fabrication and will be ready
early next week.
- More vibe
fixtures are in fabrication.
- Cable bending tools are in work at SLAC