The weather was not cooperating and as such Sandro and Riccardo are late. The flight from Rome was OK Taxi ride to Plyform.
Attendees : BenRodini, Jerry Clinton, Darren Marsh Tom Venetor, Luisella and Fulvia. - Sandro and Riccardo (late).
The agenda has been turned around and the afternoon part is done in the morning.
Ben is looking at the coupon test data and reviewing the coupon test report from Plyform. There were some questions from Ben on the standards that were used for the tests. Plyform will give us the Batch data for the COI material that was used for the GLAST side-walls.
Tensile test issues were discussed and PFM is in agreement with Ben. the difference from that of COI was discussed and it was agreed that this needs to be understood. tension is the only area where there seems to be a difference. The fiber content and void content data from the PFM coupon test conducted by TB/COI will be reviewed by Ben Rodini. The test data review is complete.
The question by Ben will be addressed during the Plant tour which is next. The tour was finished and all Ben's questions were answered. There seems to be some concern about the COI specification for the material that PFM is buying. The action seems to be that SLAC should get the spec from COI. The original spec was generated by Hytek and COI. Some where PFM should be involved. This should be resolved prior to the next procurement by PFM - end of February is the need date for the PFM Tower work.
The last suggestion from Ben was to temp cycle the free mini tower side wall to the QT levels 5 cycles @ 2 degrees per hour. Sandro will do this at Terni. This will be coordinated on thursday.
The tray production is in discussion. The spec was generated by LV and the tests are done at the tray level (ESPI & VIB). This is for the face sheet. HC spec is available and source inspection is tomorrow. The HC will be shipped directly to INFN from the vendor. The CC material that is sent to INFN from SLAC is inspected for integrity and after the machining by PFM it is weighed - each one for dispersion and uniformity of the machining process.
New shipment of bias ckt will be sent to SLAC and then to INFN. These will be used for the second Tower onwards. JC to inspect and ship the ~400 ckts that are at SLAC to INFN. The new ckts that are produced will be inserted into the production as they are available.
The start of the production for the insert bonding will be 9 February. 10 Trays without any tungsten/kapton will be done for the validation of the process of testing at INFN by the end of February. March 15 is the day when MCMs with the up to date chips are available.
After lunch the discussion is about changing COI for YLA as the material supplier for the side walls. It maybe possible to take the spec that PFM has with YLA for the face sheets of the tray to that for the side walls. INFN also wants to know if they can use the left over material from the EM Tower tray production for the PFM trays. PFM to do void content, fiber volume and Flexon test. This should be done on both laminate. It may be necessary only to do ESPI of the tray and do a lap shear test. We have come around the circle and now it looks like it is OK to do.
Talk about the ESPI test and its rejection criteria....resonance frequency, defects over 2 cms diameter. These numbers will be put in the ESPI procedure- action INFN. The ESPI test system will be brought and put in line at PFM for the production in-process tests of the unloaded trays.
Static test set to be shipped to INFN ASAP.
The NCR reporting system for within 24 hour notification will start at the bare tray level. Prior to this assy level all the NCR are treated in the data base. this has been agreed to by NASA/SLAC and INFN.
The final inspection and acceptance of the tray will be by INFN done at PFM. The final acceptance signature of the INFN person(s) will be done on INFN forms. The EIDP will be in CD form from PFM.
The thermal bake out procedure is in discussion. A TQCM monitor data is required as per NASA. It is suggested that this be a CFE. Everybody is having second thoughts about this and needs discussion. The action is for SLAC/NASA toi see the needs for this.
This leads into the PFM cleaning process. This was explained by Sandro and accepted by by SALC/NASA.
Action items have been generated by NASA. The conclusion is that Darren Marsh's concerns & Ben Rodini's concerns and Jerry Clinton's concerns have been addressed and all three have been satisfied. The Mid tray is ready for manufacturing.