Minutes of the Tracker
arrange a date for the Teledyne delta-MRR.
get Zentek’s payment squared away so that we can move
forward with cable rework.
check on the Poron foam order.
send a non-flight cable to Pisa for fit checks to the top
find or purchase the other halves of the long GASU cables.
and INFN: find the missing long PDU cables.
review and send approvals for the tray assembly drawings.
Riccardo, and Ben: review and approve PS-03467 (sidewall specs).
ship the remaining bottom tray closeout parts to INFN.
10.Robert: get the corrected test reports and certs sent to INFN for the MCMs carried by Persis.
- MCM screening and inspection
- SLAC looks on track to have 36 MCMs
fully reworked and tested by Friday.
Only MCMs with connector height <= 3.91mm are being
prepared. SLAC will send Teledyne certs and corrected test data sheets for the MCMs
that Persis hand carried. SLAC
will start preparations for reworking MCMs with gaps between connectors
and boards. It was decided that
SLAC will ship as many MCMs as possible on Friday, as this is the only
hope for not slowing down G&A.
- Mutsumi has improved the software to
include the pitch-adapter and bias trace tests and combine all data onto
one test sheet. Since workers
often forget to specify the correct MCM part number, it was suggested
that the program should prompt the user for the part number on each MCM
- Dave Rich reported on the status of
getting Teledyne production back online.
We have resolved procurement issues, and this morning SLAC received
a revised proposal from Teledyne; this needs to go through SLAC
system. Dave estimated mid to late
next week to get the PO done.
New pitch adapter designs will be tested early next week. Before resuming production we will have
a delta-MRR. Dave intends to arrange
a date today. Richard Gobin and
Diane Graeme will alternate as source inspectors 1 week at a time until a
new full-time inspector is hired and trained. Diamond Tool is quoting on the 2nd
PA test fixture. 40 new storage
cases and lids should be delivered by Monday, and a PR is in the works for
250 of them.
- Flex-circuit cable status.
- 75-ohm termination resistor rework is
needed on the Tower-A cables.
Before we thought we could get by without the rework, by choosing
for Tower-A only MCMs with large duty-cycle
timing margin. However, the other
recent MCM problems have made that impractical. Zentek is
interested in doing the work, but they want us to push SLAC to complete
payment for their previous work.
- Testing of cables for Tower-A. Hiro tested them already, but they will
have to be tested again after the rework.
- Status of Parlex issues: SLAC is
holding daily meetings with Parlex. Lowell visited Tuesday, and Dave Nelson is taking over as the
SLAC point of contact. The barrel
plating issue still has not been completely resolved. Dave said that a chemical supplier is
to visit Parlex to advise on etching.
- Second & third source status. Titan is working on first articles of
full-length cables, which are due December 1st. A QA review of Titan will be carried out
next week. A PR for Cirrex is being reviewed and approved, for them to
make prototypes of spliced cables.
- Status of other Tower-A deliverables
from SLAC to INFN.
- Grid I/F hardware: studs are at Nyloc being reworked.
Arthur was there last week and will return next week. Only 182 studs passed his thread
go-no-go test. Those are at Nyloc. On the
failed threads there are burrs that need to be cleaned, and some have too
large pitch diameter and need to go back to AMT for rework. Arthur will check them again before
sending them back to AMT.
- Cable bending tools came in
yesterday. 4 more sets are due by
end of November.
- Steve: the inner shipping container,
outer container, dummy load are nearly ready to ship. He just needs screws to hold down the data
logger. Probably he can ship on
Monday. The assembly includes the cable
holding plate, baseplate, and all
hardware. A new foam insert should
be here today. The original one
was the wrong dimension.
- Peter: alignment tools and 10 stud
sockets are in work. They should
be in on Monday from Diamond Tool.
- Fasteners are coming in this week and
next week for the top tray. The dry
fit check to the top tray in Pisa looks okay.
- Poron foam is not purchased
yet. Jeff will check up on it.
- Jeff will send a non-flight cable to Pisa next week for fit checks
to the top tray.
- Jeff should receive flight-quality
Kapton tape this week and will send it to Pisa.
- Jeff ordered 4-40 fasteners with
locking mechanisms for the thermal straps. The lead time is 3 weeks. Can non-286 screws be used? The EM vibe test used non A286
screws. We could use Solithane for
- All heat straps are at SLAC being QC’ed. Also the bars. The
tower-A set plus some can be shipped next week.
- Solithane shipped out yesterday. Jeff will send a pro-forma. Probably it will arrive Sunday or
- New M2.5 100-degree torx+
screws should be in today; SLAC will test them and ship next week. The old ones clearly had a fit
problem. Samples received of the
new ones look and feel much better.
- The desiccant needs to be sent; also the
ESD wrap. A big shipment will be going
out next week.
- SLAC needs to ship bias circuits
tomorrow! About 180 of them are
- Tungsten was received in Italy from NASA, so that
seems to be going well.
- 2 EGSE systems should be at SLAC ready
to ship; Hiro needs to inspect them.
A 3rd is also owed to Italy but is being used
right now for testing cables at SLAC.
- EGSE T/V cables: 1 complete set of long
cables is in Alenia working. They also have 3 half GASU cables. Jeff needs to find and ship the other
halves. There should be 3 PDU
cables in Italy. Jeff and Pisa need to check on
this. According to the July 1
minutes 1 PDU cable was in transit at that time, and Jeff had 2 more to
- Document approvals:
- Revised tray assembly drawings. We need signatures from Darren and
Jack, as well as all Tracker people.
- We need TD-03651 approval from Sandro.
- Sidewall procurement specs, PS-03467,
needs approvals from Sandro, Riccardo and Ben Rodini.
- Additional BT closeouts and CC material:
6 + 4 bottom tray closeouts are ready to ship; 20 tray sets previously
shipped to INFN. One was used on
the EM, and another was used on Tower-0.
- G&A status/progress: They have put electronics on 4
trays. The connector height matching
is very tight, making the work slow. They are now proceeding with mounting
ladders, and these trays will be ready for testing Monday. INFN Pisa is working hard on adapting
pockets for the MCMs on hand. Nanda
and Sandro estimated December 1 for the start of Tower-A
- Trays, bubbles, cuts, etc. There will be an MRB tomorrow on Kapton bubbles
- A.O.B. The 2nd data logger is on its
way back from Pisa to SLAC. Sandro should have certificates for the 1st
prepreg shipments in his email.
That prepreg is at Plyform.
The 2nd shipment needs to go out such that it arrives no
later than a Wednesday in Pisa.