Minutes of the Tracker Technical Meeting, January 9, 2003
1. Project schedule issues (see Althouse's note below)
2. Mini-tower schedule:
Week of January 20: practice ladder/MCM integration at G&A with a dummy tray.
Week of January 27: glue ladders, attach MCMs, and wire bond at G&A (2 weeks).
Week of February 10: test the completed trays in Pisa.
Week of February 24: ship the completed trays to SLAC.
Week of March 3: assemble the mini-tower at SLAC and test.
March 10: deliver to I&T.
3. Bias circuit insulation problem
4. Status of work at G&A (ladder production, encapsulation. . .)
5. Status of the second ladder assembly line (MIPOT)
6. EM MCM status
7. Mechanical design status; detailed bottom tray FEA model
8. Test plan for CC testing
9. Sidewall procurement
10. CDR Preparations (only about 2 months to go!!):
- we need complete plans/procedures AT LEAST in draft form for each process:
* ladder production (done)
* ASIC testing, MCM assembly and test, MCM burn-in
* tray panel assembly
* tray integration
* tray acceptance and qualification testing
* tower assembly and test
* tower shipping
- all drawings need to be complete and released
- spares plan, requirements and ICDs released, etc., etc.
- test results documented
1. Sandro: complete the plan for flight tray panel fabrication after the first EM trays are done.
2. BJ: send Sandro the assembly drawings for the top-tray assembly tooling.
3. Put the MCM identification numbers on the invoice and the black boxes when shipping to Pisa.
4. Tom: purchase 500g of encapsulation materials for MIPOT.
5. Tom: find when Teledyne will be ready for us to test the remaining MCMs.
6. Tom: complete a draft plan for the CC material testing.
7. Sandro: discuss the proposed sidewall procurement swap with Ronaldo.
8. Robert: send out the updated procurements list (attached)
Robert discussed the schedule issues and emphasized that the Tracker group must commit to catching up on the schedule by the end of the fiscal year. This means that we must stay on top of getting the flight procurements and productions going on schedule in the next few months. To start with, the CC material is arriving on time, and the ASICs have been ordered within about a week of being on time. The biggest problems will be dealing with this while in parallel completing the paperwork needed for CDR (and the procurements) and completing the fabrication and test of the engineering model. Below is included the project manager's comments on the schedule problems and what we need to do.
Sandro said that he can present a more realistic plan for flight tray panel fabrication after completing the first 4 mini-tower trays. Tom said that it would be good to have this for the DOE by the end of month, when Althouse has to make a presentation. Sandro says that a rate of 10 trays per week is planned. The order for a sufficient number of tools was submitted in December. One top tray tool is enough and is already in hand.
Tom said that as soon as the dimensions are fixed, SLAC will build a tool for the bottom tray assembly. Sandro said that Pisa needs assembly drawings for importation of everything in the box of top-tray assembly tooling. BJ will email it.
Sandro said that when shipping the MCMs there should be an identifier number on each board and we should put the same number on the invoice. When shipping a tool, give it a name and include a drawing with the invoice to identify it.
For the EM working trays, Sandro plans to encapsulate the wire bonds from MCM to SSDs on only the last tray, for thermal vacuum testing. This is to expedite delivery of the mini-tower.
G&A will finish flight ladder wire bonds this week for the first lot of ladders (300). They are close to finishing optimization of the encapsulation. There will be some extra cost, as they must cure at 60C for four hours, rather than doing a room temperature cure as was originally planned.
The ladder processing know-how will be transfered to MIPOT after completing the process at G&A. Tools are ready at MIPOT. However, Sandro noted that MIPOT needs encapsulant. Tom will procure it. 500g will be enough for the first 100 ladders. MIPOT can procure the materials after that first lot.
Tom will call Monique today to find about about the Teledyne status on the remaining working boards. 8 of them were completed before Christmas.
Erik said that Hytec needs the CC test results by the end of January. Tom will have a draft plan early next week. The bottom tray FEA model was built. Preliminary numbers have come out of that, but they are working on checking the model. We can expect cost estimates the first week of March.
Sandro needs to speak to Ronaldo about the sidewall procurement issues. Tom has a good quote on all of the material (EM plus flight) from COI and has proposed to buy that with Pisa buying more SSDs in return. Althouse agrees in principle to such a swap. Sandro will answer on Monday. Tom said that he will be at COI on Wednesday, so he would work out the details then.
Tom said that Ossie is starting to write a tower assembly document for review by Sandro.
Robert updated and will send out the list of procurements.
From Bill Althouse:
We must get the project back on schedule. Our funding agencies and SLAC management are demanding it. We owe it to each other that we deliver what we promised, when we promised. Furthermore, controlling schedule is important to controlling budget.
We have set a goal of getting back onto our schedule by the end of FY03. “On schedule at the end of FY03” means less than one week of unfavorable schedule variance for each subsystem and, therefore, for the project.
As an intermediate goal, we must stop any further deterioration immediately. We must be able to demonstrate at the LAT CDR that we have the schedule under control. Our intermediate goal is to have no further slip in schedule between November and the CDR. This means that the March schedule variance for each subsystem will be more favorable than the November reported schedule variance.
These are achievable goals but we will need to work hard to make them happen. Starting immediately, we need to implement the following policies:
· identify problems early and take quick remedial action.
· stay focused and not pursue alternative designs at this point in the project.
· concentrate more on meeting the schedule and rely less on changing the plan.