Tracker Status

June 25, 2004

EM Vibration Test

- The test setup began Monday at Alenia and all test cases in z, y,

and x were completed by COB Thursday, one day early.

- All preliminary results point to a completely successful test. The

frequency shifts after-vs-before random vibe were at most 1%. The

resonant frequencies and Q's were consistent with expectations.

No fasteners were observed to lose torque, and no damage was observed.

Tower-A Mid Tray Panels

- During thermal-vacuum testing of tray panels (no electronics or silicon),

debonding of bias circuits was observed on the tungsten side of the trays.

This is introducing a delay to review and improve the tungsten surface

preparation prior to bonding of the Kapton circuits.

MCMs

- Quote for MCM resistor rework (75 ohms) are due today from Teledyne

and Zentek.

- 36 MCMs are in burn-in at SLAC.

- Parlex is ready to start producing prototype improved pitch adapters as

soon as SLAC releases a PO to them.

Tray Assembly (MCM and ladder integration)

- G&A has successfully completed wire bonding tests on preproduction MCMs.

- The bonding procedure for MCMs has been finalized.

- They are working on finalizing the process and tests for wire bond

encapsulation.

- Assembly of 2 non-flight trays should begin early next week.

Flex-Circuit Cables

- 6 C0 cables were received at SLAC and tested. Two of them have problems

that are under investigation.