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| AI # |
Resp. |
Action |
Status |
Closure Date |
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Design issues discussion |
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| 1 |
Riccardo |
Supply mid tray actual as built measurements. |
Measurement in hand |
4-May-04 |
| 2 |
Sandro |
Machine top & bottom tray inserts for T76 alum |
Pending drawing revision/release/authorization to proceed |
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| 3 |
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Sandro will contact machine shop for prefered material for MCM
pins. 6000-series is probably no
issue-check with Jeff Tice |
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| 4 |
Peter A |
Update
mid-tray assembly drawings after receiving redlines. |
pending redlines from INFN |
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| 5 |
Nordby |
Modify closeout drawings per redlines |
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| 7 |
Riccardo |
Tungstun & Bias Circuit location not shown on
LAT-DS-00148. INFN to provide redline
to define tolerance. Also any other
redlines for mid-tray assembly drawings. |
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| 8 |
Riccardo |
Answer B. Rodini's question about face-sheet layout method
(resing loss?) |
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| 9 |
Sandro |
INFN to provide redlines for LAT-DS-00180(For G&A) update to reflect actual design for MCM
Alignment pins, remove screws, remove tungsten from this level of assy., bond
line for MCM bondline, (SIMILAR ACTION FOR FIVE DWGs,
3 mid tray, top, bottom), position of
ladders. Be sure to include line of
adhesive under ends of SSDs for encapsulation dam. |
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7-May-04 |
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Robert |
Review and update as needed level-4 mechanical requirements
document regarding the ladder position tolerance |
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| 11 |
Emilio |
INFN to provide draft Tower Assy. Procedure for SLAC review. |
First part (pre vibration) is ready |
5-May-04 |
| 12 |
Nordby |
Update sidewall drawings according to redlines |
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7-May-04 |
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Riccardo |
Revise sidewall washer assembly tooling drawings |
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14-May-04 |
| 13 |
Nordby |
Revise top/bottom tray insert drawings according to redlines |
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4-May-04 |
| 15 |
Nordby |
Martin-
Add ground wire on Bottom Tray Assy. Drawing LAT-DS-00050. Ground wire inserts in hole in bottom tray
and is bonded with electrical conductive adhesive Hysol CV 2646. Add to BOM, screw, wire assy (lug &
wire). Spec for wire- Multi strand
twisted, 22gauge (approx. .5mm). |
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11-May-04 |
| 16 |
Sandro |
: INFN to investigate- Crimp & solder
premade (G&A?), provide ground wire assy to plyform and install. Bare wire, no insulation. Will G&A make the solder assembly. |
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7-May-04 |
| 17 |
Aldo/Sandro |
Bottom Tray Core-
Reorder does not support build schedule for Tower A, EM Bottom Tray
and possibly Tower B. INFN to
create NCR and conduct MRB to authorize plyform to trim to meet dimension per
print and scrap remaining material. |
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7-May-04 |
| 18 |
Nordby |
Update top/bottom tray facesheet drawings to redlines |
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4-May-04 |
| 22 |
Nordby |
Update top/bottom tray closeout assembly drawings to redlines |
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7-May-04 |
| 28 |
Nordby |
Re-define top and bottom tray coordinate system using –Y struc
closeout face and +X pin on the –Y closeout. |
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30-Apr-04 |
| 29 |
Nordby |
Change top and bottom tray inserts so tol on flange thickness is
+0/-0.1 mm, to reduce likelihood of bottoming out insert in counterbore. |
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| 32 |
Nordby |
Send IGES file of stripped down tower model with Grid Simulator. |
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14-May-04 |
| 33 |
Tice |
Sandro- Concern regarding aeroglaze application on
closeouts. Primer is very very
toxic. Sandro is conducting a
development test of painting closeout wo/ primer. Thermal cycle five cycles testing 90 to -50 deg. Sandro will
evaluate results tomorrow. Drawing
currently calls out primer! Sandro does
not want trays to go to Plyform paint area. Jeff Tice provide MSDS sheet to INFN for Aeroglaze Z306 paint
and Primer 9924. Also, contact
supplier to find out what application methods are recommended (for use on
carbon-carbon) to comply with safety regulations. Is there an alternative primer available which is less toxic? |
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3-May-04 |
| 34 |
Nordby |
Martin- Inspect Sidewall washers LAT-DS-00909 current rev. of
drawing to “as-built” H/W (in bonded stores at SLAC). Have J. Tice generate W/O. LAT QA is
to perform inspection. |
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7-May-04 |
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TRR- Tray Vibration |
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| 35 |
Francesco G. |
Release tray vibration fixture drawings |
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| 36 |
J. Ku |
John Ku to review &
approve LAT-TD-00154-2. |
Pending revision |
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| 37 |
Francesco G. |
Review and revise the lower-frequency limits for acceptance |
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7-May-04 |
| 38 |
Francesco G. |
Add detail to procedure regarding visual inspection criteria |
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7-May-04 |
| 39 |
J. Ku |
Concern that for bottom tray, could unsupported flexures get
damaged? What is the natural
frequency of the flexures?
ACTION: John Ku review
(estimate) natural frequency of flexures constrained at one end |
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| 40 |
? |
:
INFN- For first bottom tray
tested, install an accelerometer on a corner flexure to measure response
level. |
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TRR- Tray Panel Thermal
Vacuum Testing |
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| 41 |
Francesco B. |
Delete sentence about requirement to stabilize the glue. (Revise scope statement in general) |
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| 42 |
Marsh |
Martin- Concern of
cleaning and contamination control.
Raised when it was said that Plyform does not handle trays
w/gloves. Sandro said that a cleaning
process is used prior to bonding operations.
MN- Build in class 100k or
cleaned thereafter. What is
cleanliness of inside of tray?
Specifically finger grease.
ACTION: LAT QA- reviewing contamination control plan as it
pertains to tray materials, specifically honeycomb. |
Darren is clear on the response he needs to provide |
19-May-04 |
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Riccardo |
Find out what Plyform's procedures are regarding glove usage |
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| 43 |
Francesco B. |
Rewrite NCR section in the procedure document |
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Darren |
Send F. Belli suggestion for NCR paragraph and visual inspection
requirements |
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7-May-04 |
| 45 |
Francesco B. |
INFN to verify that cold trap is used in set-up. Document in procedure to verify that cold
trap is functional. |
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| 46 |
Francesco B. |
Specify that tray’s must be installed into rack with structural
closeouts to sides orient such that Bias circuit bonding pads do not rest
against support rails on rack.
Possibly remove material from front of slides. |
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Francesco B. |
Revise procedure for bolting trays to the fixture, to insure
that expansion of the fixture does not stress the trays |
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| 47 |
J. Goodman |
review and approve this procedure. |
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| 48 |
Francesco B. |
Add to para. 9.5 “double bag” and desiccant for packaging. Also, add word “if necessary” to alcohol
wipe. |
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INFN Database |
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| 49 |
L. Latronico |
Add Revision level to part no. in database. |
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| 50 |
L. Latronico |
Add DRB in flow at the following locations: 1) before shipping
tray from Plyform to INFN (for ESPI testing) and 2) before shipping from INFN
back to Plyform for Tu & Kapton installation. |
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Tray Thermal Test Plan |
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| 51 |
Robert |
Send plan and procedure out for review and sign-off |
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PRR- Top & Bottom Tray Panel Assembly Procedure |
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| 54 |
Tice |
Review
design & materials matrix and ensure that all items are identified who
provides them. 1) Update Design &
Materials Matrix to reflect design status (to reflect redlines agreed w/INFN
4/27/04. 2) Add
column for “authorized for flight production”. “not authorized for flight production”, “material procurement OK for flight
production”.
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Needs info from INFN (Mirco Bagni and Riccardo) |
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| 55 |
Sandro |
Sandro-
Contract with Plyform is for EM drawings & materials. Robert-
This contract needs to be revised using latest revisions. This must be done prior to start of
production. |
Pending release of drawings |
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| 57 |
R. Johnson |
Provide Jeff with full list of procedures used on TKR and ask
Jeff to include them in the drawing/materials matrix |
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3-May-04 |
| 58 |
Rich |
Follow-up action:
Establish rev. level & release status for the procedures |
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| 59 |
Robert |
Submit for release sidewall specifications (incl. pre-preg
materials specification) |
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3-May-04 |
| 60 |
Tice |
Nusil, aeroglaze, and primer problem w/procurement in EU. Sandro sent list of materials requesting
SLAC to procurement. ACTION: Jeff. Tice provide materials requested
(via e-mail request). |
In progress |
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| 61 |
R. Johnson |
Send Top & Bottom Tray assy procedure to Natalie, distribute
for review and approval. |
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30-Apr-04 |
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PRR- ASSY of trays with MCMs and ladders in G&A |
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| 62 |
Sandro |
Send G&A MCM integration test results to SLAC |
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| 63 |
Robert |
Send the procedure document for release |
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30-Apr-04 |
| 64 |
Nordby |
Verify
MCM mounting holes 11 plcs align with respective holes in top/bottom tray
closeouts. |
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7-May-04 |
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Sandro |
Check preproduction MCM fit to the flight mid tray |
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4-May-04 |
| 65 |
Nordby |
Martin- Check height of alignment pin to ensure
that it does not interfere with flex cables (etc.). |
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7-May-04 |
| 66 |
Sandro |
Concern- Martin Alum
alignment pins should be Ni. Plated.
Alum oxidizes and would inhibit electrical conduction. ACTION:
Sandro will check with G&A for plating process (or use of brass). |
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3-May-04 |
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Sandro |
Discuss with G&A possibility of double wire bonding of HV
and SSD bias. Also find value from
G&A for the nondestructive pull test. |
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| 67 |
Nordby |
Martin will update drawing of MCM alignment pins accordingly. |
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Ladder Assy to
trays |
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| 68 |
Sandro |
Design & Fab bottom tray to ladder assy fixture |
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| 77 |
Robert |
Check with Jeff on shipment of two EGSE test sets (and
mini-tower cables) to INFN. |
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3-May-04 |
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Robert |
Get status from Jeff on T/V cables |
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3-May-04 |
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PRR- Sidewall
Procurement and Specification |
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| 78 |
Robert |
Distribute for review & Release LAT-PS-03467. |
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| 79 |
INFN |
Aeroglaze callout in procedure should be Z306 (is A2306). |
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| 80 |
INFN |
Change max. thickness in procedure, should be 1.625mm (is
1.630mm) |
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| 82 |
Martin |
Review & release 4.0mm Ti washer (thinned down, rev.2),
procure, and ship to INFN. Also,
investigate remachining rev. 1 to rework to rev. 2 configuration. |
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| 83 |
SLAC QA |
Review materials certs and inspect washers (units in bonded
storage b/33). |
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| 84 |
Martin |
SLAC- Revise & release sidewall drawings |
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7-May-04 |
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Riccardo |
Purge Rev 7 bias circuits when sufficient quantities of Rev 8/9
bias circuits are available |
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Albert |
Replace old connector savers before shipping MCMs to Pisa |
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3-May-04 |
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Jeff |
Verify price and lead time for flight quantities of eccentric
cones |
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Martin |
Evaluate design concept for permanently mounted corner blocks
for top tray alignment targets |
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