Minutes of the Tracker
Meeting
May 27, 2004
Action Items:
John Ku and Mark Molini are
preparing to bring all needed hardware for the static test, including the grid
simulator, cones, studs, hex bushings, nuts, tools (spanner wrenches, dithering
tool, extraction tools 2 types). They
are also bringing all tools used in interface hardware development testing,
including the aluminum piece that simulates the grid (Arthur will demonstrate),
and shims.
The cone setting template
and offline cone setting tools are not available yet but not needed for the
static and EM tests.
Mark Molini is also bringing
the CV2500, 2646, and 1142 adhesives.
Vibration fixture status: Drawings
are approved and released. Mike met
with purchasing; Bev Freeman was assigned as the buyer. She has gone out with an RFQ. Responses are expected today. We are
requesting 2 units from each of 2 vendors.
Requested date is June 11, but certainly no guarantee yet. Sandro said that the vibe test request data
has been moved to June 21 and communicated to Alenia. There will be no kapton or SSDs or electronics on the bottom
tray in the EM test. To meet this test
date, he needs the grid simulator in Pisa June 15.
Mike reported that the square
nut plates are due in next week and the niconix nuts this week. The coating and locking features for the
studs will take 1.5 weeks based on known performance.
The installation plan for
the static test is fairly completed but will still be updated some. SLAC has coated studs now to use to evaluate
better the torque spec. Emilio plans to
use Arthur's draft plan as procedure to be redlined in process. The static test procedure itself is being
worked by John Ku. A preliminary TRR is
scheduled for next Wednesday.
Dave told us about a plan to
prepare for Tower-A alignment based on using Tom Borden’s tower simulator for
development and practice. Tom has reworked
the corner flexures with conics and is installing new side flexures. A CMM expert (contractor) will be at SLAC on
June 14,15 and will work with the CMM to write a program for the alignment
procedure. This will be tested on the
tower simulator. They will then mount this
tower simulator on the grid simulator and measure knowledge of the grid-simulator
tooling balls and 4 large alignment balls on the top tray. Then they will take the simulator to Pisa on
June 21 with this expert and Robert Ruland.
There they will work with Emilio and Riccardo to go through the routines
using the Pisa CMM.
Mid tray panel fabrication
status:
- Closure of primer issues:
the INFN NCR should reflect concurrence of Rodini, Nordby, Rich, etc. in the
decision to use the 9924 primer.
- Drawing update: no
progress, SLAC presently is only working on the drawings with payload
- Nusil: the 2646 the Mark
Molini is taking is needed at Plyform
- Bias circuits: Jim took 43
to Pisa. Darren said that Parlex will
deliver 250 next week
- facesheet samples for Ben:
Jim is carrying them back to SLAC
Top/bottom tray panel fabrication
- inserts: to be in hand next
Monday or Tuesday
- assembly tooling: Next
Friday
- closeout machining (top
tray): in progress; Martin wants to see
the inspection report and drawing redlines (if any). Martin said that INFN needs to make sure that there is a 100%
inspection of all dimensions for the first 3 closeouts of each type.
- drawings: Martin is waiting
for info on lugs and the soldering method in order to finalize the bottom tray
assembly drawing. Sandro directed him
to a sketch in the assembly procedure; Martin will use that and send out the
drawing for release.
Martin will modify the paint
call-out on the closeout assembly drawings.
- assembly procedure:
Riccardo needs some LATDOCs numbers from Robert for all the tooling drawings.
Schedule: Sandro predicts June
10 to have the first bottom tray done with static and vibration
Tray assembly at G&A
- status of development work
& tests at G&A: they are recovering from some errors in the tooling
drawings. At this time the tools are
ready for MCM attachment; they are working on defining the program for glue
dispensing. Wire bonding tests in
progress. Sandro will be there in 8
days to see all results.
- TMCM pins: 2 days ago the
aluminum was received. The first pins will
be ready for test mid next week (Thursday, since Wednesday is a holiday).
G&A will first assemble
two non-flight trays, using preproduction MCMs and rejected ladders. Dave will tell Albert to bring back scrapped
PWBs with pitch adapters from Teledyne.
Robert will look for available preproduction MCMs to send for this
purpose. G&A has used the first 10
preproduction MCMs for the mockup trays.
- Nusil: the CV2502 at SLAC
should be shipped to Pisa immediately.
- MCM receiving and test: Luca
reported that all 11 passed the tests
- assembly drawings: Martin
reported that check prints will be out next Tuesday and Thursday; first
priority is the mid tray with thin converter (drawing DS-00180).
- documentation release:
1801, 3359 and 3534; Robert received the 1801 update from Sandro but needs to
do some editing on it to correct cross references and resolve a TBD and TBRs.
Flex-circuit cables
- C0 EGSE cables: due June
10 from Parlex
- Flight cables: an
expensive quote was received from Parlex, with substantial expediting charges
to meet our needs for the first two sets.
We will have to order only 21 sets: 1 for Gunther, 18 flight, and 2
spares. We will find a different
solution for EGSE (in addition to the 10 C0 cables on order).
- Burn-in cables: Jerry is
ordering 10 new ones, to be loaded with new, flight Omnetics connectors.
Sidewalls
- prepreg is in route;
Plyform is ready to receive it
- titanium washers: were due
at SLAC 2 days ago but no status at this meeting
- specification release (PS-3467):
Natalie just sent it out for final comments.
Robert needs to look at some comments that came back from Jerry Clinton.
- EGSE status: Robert needs
to get status info from Gunther. SLAC
needs to send over a couple more sets in the next weeks. Jack has an action to look into the Alenia
sets, which will need to go into vacuum.
Robert needs to find somebody to help order 10m cables for the T/V, as
Jeff never got it done before leaving.
Other MGSE status
- Lifting fixture: Wing Ing
revised the drawings to have aluminum plates instead of flexures. The plates have shoulder bolts and oversized
holes in some arrangement to avoid prestressing the tray.
- Inner shipping container: Martin
is working on the design; the vibe fixture and cable holding plate are included
as integral parts of this. Design of
the cable holding plate was also taken over by Martin; he is changing the
design so that we can plug into the TEM without removing the cable holding
plate.
- Outer shipping container:
nothing done on this; Robert needs to find somebody to run the procurement.
- T/V test planning status:
Nanda noted that the heat-strap drawing uses American screws; they need to be
delivered with the heat strap (note needed on the tower assembly drawing). Martin noted that the T/V GSE drawings need
to be released in LATDOCs. SLAC will
use them to make a drawing of the test configuration.
There was some discussion of
heat strap design issues; INFN wants to glue the parts together; they need to
send a clear explanation of the need for this because of a large impact on the
design and analysis.