Minutes of the Tracker
Meeting
June 17, 2004
Top and Bottom Tray Panel
Fabrication:
-
Top/Bottom-Tray
procedure documents
o Riccardo is still working it
and will go over it with Martin tomorrow.
-
EM
bottom tray manufacture, CMM, and static test results
o No anomalies. INFN will send CMM measurement summaries to
SLAC tomorrow.
-
Status/schedule
for manufacture of the Tower A bottom and top trays
o Start next week the flight
bottom/top tray assembly.
o Closeout machining is not
started yet for the top tray. They
expect to start Tuesday, and we can expect 1 week after that to have an assembled
bare top tray.
-
INFN
needs the new static test fixture for the Tower A static test by 28 June. Arthur wants to be there for the test and
can hand carry stuff. The second
fixture, with surface coating, should be ready (the one in Pisa rusts) and will
be shipped asap. As for interface
hardware, it will not be possible to have the flight order in Italy by that
date, so EM studs and cones will have to be used for the test.
Mid Tray Panel Fabrication:
- Need 11 standard mid-trays -
3 are in Rome for
bakeout
4 are ready to be
shipped to Rome from Plyform
2 are in paint
(last step at Plyform)
2 are in ESPI testing
in Pisa and still need to go back to Plyform for Kapton and tungsten.
-
Need 4 heavy mid-trays
2 are in paint
2 are in fab
(final trim)
-
Need 2 light mid-trays
2 are in ESPI
testing in Pisa
-
56
bias circuits will ship from SLAC to Pisa today; 125 are in Italy
EM Vibration Test:
-
Status
of test preparations and hardware
o Tower assembly is complete
and ready for the vibe fixture; the procedure was redlined
o Plan to mount the vibe
fixture tomorrow and pack up for Alenia in the evening
-
Fastener
issues
o INFN is cutting M4 screws to
7mm as needed
o Installation torque was
increased up to 45 inch-lbs
o Paul suggested that we
overtorque to seat cones and then back off, so Arthur will consider this
o Arthur reported that they
will probably have to use 3M2216 epoxy to lock nuts in the vibe test, as the
nylock isn’t working so far on the nut end of the stud. He has tested this but will re-evaluate the
need based on the studs that Martin is bringing.
-
TRR
schedule
o 8:00 Monday; Dave will set
up a number
o Paul will email a suggestion
to modify the procedure to run two low level tests back to back before starting
the random vibe test
Tray Assembly at G&A:
-
G&A
tooling status & schedule for starting/finishing tray assembly
o Sandro talked to G&A
yesterday, and they are making good progress
-
Assembly
drawings
o The standard mid tray
drawing is out as a check prints, so comments need to go to Martin
-
Procedure
document
o Sandro has the info on
tooling drawing numbers and will send it to Robert
-
MCM
rework plan
o An RFQ and SOW will be sent
tomorrow to Teledyne and a Bay-Area company
o Resistors are supposed to
arrive Monday.
o The drawings have been
updated and will go out for release today.
Stacked Tray Testing
-
6
C0 cables arrived at SLAC today and will be tested before shipping to Pisa
Sidewall Fabrication:
-
Specification
document
o Riccardo will review it with
Martin tomorrow
-
Aluminum
foil: Sandro is picking up the aluminum at CERN today
-
Ti
washers
o Both sizes are present in
Pisa
o There remains a need to
check the 100 degree included angle; Jeff will send an email to INFN on this.
-
Schedule
for starting/finishing Tower A sidewall manufacture
o Material testing is in
progress
o Sidewalls are to be in Pisa
July 14; coupon testing is the most time consuming activity
Tower Assembly:
-
Procedure
document
o A draft should be ready for
review by the end of next week
-
Assembly
drawings
o These are in work at SLAC
-
Fasteners
status
o M2.5 120 degree screws were
shipped to Pisa; 13,000 parts
o Jeff is procuring some M2.5 screws
with 100 degree heads (needed between sidewalls and the bottom tray). The previous stock, as used in the EM, got
lost in MRB land.
o We need some new M4 screws
because 4 per tower need to be 6mm length.
Jeff said that the lead time is too long for Tower A, so existing screws
will have to be shortened. Nanda will
check if INFN can do it in Italy.
-
I/F
hardware status
o SLAC is requesting the 1st
flight units (18) by June 30; he will get a reply from AMT today.
o After that date they still
have to be coated, have nylocks installed, and ship to Italy.
o Enough are in the purchase
request to have 2 sets per tower plus spares (this is contrary to what was
reported in the meeting)
-
Vibe
fixture and cable plate and square nuts
o The second fixture is
completing today at the SLAC shop. It
will be used in alignment training and then to to Pisa July 1
o Dave will check on Humbolt
progress on the flight order. We will
have to use the SLAC versions for Tower A if one is not ready from
Humbolt. The SLAC versions have the
tower mounting holes out of tolerance in position by up to about 50
microns. That should not cause any
problem, though, as it is well within range of the cones.
o We didn’t get a status on
the cable plate, but it clearly is needed at about the same time for Tower A.
-
Top
corner pieces (for cables and retroreflectors)
o Drawings are still in work
o These need to go on the
tower before the vibe test, so machining them will be critical soon.
- Flex-circuit cables
-
I/F
installation tools
o Peter will start testing
functionality of the tools next week.
§
Template
for flexures, template for mounting cones together, dithering tool, extraction
tool, spanner wrench
§
Arthur
said that we need to make more extraction tools (1/4 inch), as they break
easily
Schedule:
- INFN recommends doing the T/V test first, starting July 19, as it will be easier to manage the vibration test into August. July 29 and July 30 the last days for McCarthy and Goodman, so this plan works best for them, too.
-
It
is critical to have the inner tower shipping container and the lifting fixture
in time for Tower-A transportation from Pisa to Alenia!