Provided below are the meeting minutes and actions taken during today's Tower A Environmental Test TRR (Vibe and Thermal).


Participants:  R. Johnson,  J. Ku, J. Goodman, P. Baird, Chris Fransen, R. Bright, M. Opie, E. Roulo, D. Rich, M. Nordby, P. Hascall, H. Tajima, S. Lundgren N. Menon, N. Mazziotta, F. Giordano, S. Raino,





Here are the action items and comments John Ku recorded during today’s TRR.  “A” denotes an action item, “C” denotes a comment.

  1. A:  If time permits, do a “very low level” sine sweep run to characterize/understand the lateral mode frequency shift observed from Z (cross axis response @ ~180Hz) to X and Y (in axis response @ ~150 Hz)
  2. A: Consider cutting out some preliminary runs to save time, especially the -3dB run.  Blackline procedure as appropriate.
  3. A: Widen notch bandwidth on random vibration profile to account for frequency shift, i.e. you have to step through increasing levels to reach full level and the resonance can shift during this stepping – the notch bandwidth should be wide enough to capture this total drift.
  4. A: Mike Opie to update slides 11 and 12 to reflect test duration (change from 120s to 60s)
  5. A: SLAC and INFN to reopen major NCRs to discuss cable corner clip installation issues, uninstalled hardware, damaged helicoils, flexure out-of-spec conditions.
  6. C: Mike and Nicola to follow same settings used on EM test (p7 of procedure)
  7. A: Chris Fransen to check pre-post test alignment procedure documented in TKR Assembly Procedure.
  8. C: Torque striping of stud/flexure should be visually inspected between axes.
  9. C: Locking feature on sidewalls WAS used.
  10. C. Pre/Post test electrical test WILL identify new breaks in wirebonds
  11. A (closed): Check basis of 4g limit in Z low-level sine sweep.  Mike and Eric confirmed that these levels were based on observed test levels.
  12. A: John Ku to update procedure to verify Grade 8 or equivalent bolt is used in step 120 of p.24.
  13. A: Pat Hascall to provide TRR checklist to Dave Rich
  14. A: Pat Hascall to make list of additional steps needed to comply with above TRR checklist.

As for action item need dates, they all need to be resolved prior to the start of the test.




1.  A:  (Jack Goodman)  Define bake-out criteria for TQCM.

2.  C:  Thermal balance will be performed on Tower B if schedule test time is not available for Tower A.

3.  A:  (Nanda Menon)  Provide list of spare EGSE that should be on-hand at Alenia to protect schedule if an EGSE problem were to occur.  Denote which spare EGSE materials that INFN will supply to support Tower A testing.  In addition, denote the items that should be on-hand (long term) to support future Environmental Testing.   Long term spares list will have be reviewed to determine where these items can be obtained.

4.  A:  (Hascall/Goodman/Mazziotta)  Define and place under configuration control the required reference documents (ref. slide #5 of presentation) that needs to be controlled under configuration management.

5.  A:  (Tracker Management Team, 12/10/04)  Finalize the protoflight temperatures requirements for Tower A Thermal Vacuum Testing.  The current requirement is -30 to +50 deg. C.  Due to NCR investigation of broken wire bonds on SSD Ladders on Tower A, further tray level testing is being performed to evaluate design temperature margin.

6.  A:  (N. Mazziotta)  Edit procedure to remove reference to inversion of Tower at Alenia for installation of thermal couples.  Thermal couples located on bottom tray and tower base plate are installed at Pisa.  Ensure that thermal couple wires are taped down to avoid damage due to vibration testing and handling.

7.  C:  Jack Goodman cautioned that T/V test team needs to watch temperatures very carefully when heaters are turned on to prevent temperature overshoot when approaching plateau.

8.  A:  (N. Mazziotta)  Define staff plan and call-in contact list to support three shift T/V testing.

9.  A:  (N. Mazziotta)  Update procedure to document removal of cable support plate for thermal vacuum configuration.  The cable support plate is located directly under the tower base plate and is used during shipment and vibe testing.

10. A:  (N. Mazziotta)  Ensure that if the test termination criteria case is hit, that contingency procedures exist to ensure safety of the test article.

11. A:  (E. Rapposelli  TBD)  An INFN mechanical engineer is to review the Alenia Tower lifting operations.  This is a "below CG lift" and is therefore a very critical lifting operation.  It was reported that this configuration lift was previously performed.

12.  A: (Hascall/Tajima)  Review Electrical Functional Test Criteria.