Minutes of feedthrough meeting of March 27, 2000. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Present: MGF, GV, AD, Pof, MLenc, RL, JL, TH, PB *) Milestones: - 34 seal rings arrived on 22 March. All have been inspected and documented. Two of the 34 have minor flaws or are out of spec; these are waiting for further inspection before a final pass/fail status is decided. The 32 seal rings that are definitely ok will be shipped this week to BOA for bellows assembly. Several of the seal rings were found to have a very tight fit around a prototype warm flange (the seal rings must clear the warm flanges so that the bellows can be brought into place). The prototype warm flange however has an OD at the outer end of the tolerance band; if the OD was closer to the centre of the tolerance band, the seal rings would clear easily. Furthermore, if a seal ring is found to be tight, application of a very modest amount of heat to the seal ring produces adequate expansion to eliminate the clearance problem. - 58 cuff rings arrived on 20 March. 14 of the cuff rings were failed by the manufacturer, but passed by us, although three of the 14 will require some minor repair. 34 of the cuff rings will be sent to BOA along with the 34 seal rings. - Steel for 21 Cold flanges and 22 Funnel bases arrived. The steel shipments for the Warm and Cold flanges, and for the funnel bases are now complete. There is still the steel for 31 seal rings to come. - The conflat flanges to be welded to the bottom of the lower funnel tube arrived on 28 March. *) The steel order for the 8-row pincarriers was for 396 pieces. We have an invoice (and will pay) for 417 pieces. Apparently a +/- 5% fudge on the numbers is standard for this type of order. *) All of the 7-row pincarrier steel is yet to be delivered. It is expected to be delivered to HCC in May. *) There has been no reply from Aboud regarding our offer of the 3 PCT and 1 Glasseal pincarriers. Perhaps the price has put him in shock... *) The UVIC heater design will require four addition holes to be drilled in the warm flanges. This would cost an additional $4000 if Ebco was to do the job. We will instead have Dave do the job in our machine shop. *) Another two flat weld specimens, with the correct bevel at the butting edge, are to be supplied to TIS. These have been ordered from SM. *) Terry received from CERN the report on the Charpy test that was performed and passed last week. *) Alberto Desirelli from TIS informed Terry on 28 March that the burst test was performed and passed. The test procedure is summarized as follows: 30 bars at Room Temperature 4.5 bars at LN warm up leak check 4.5 bars at LN warm up leak check 4.5 bars at LN warm up leak check The performance of the pin carrier during these tests was more than satisfactoy. A report will be prepared and sent to Terry. *) Terry received a report from the company in Richmond (Bacon Donaldson) that was examining the steel which had the minor flaw (this was the piece found by Mark while examining the steel pieces after the BNL `bad steel' scare, and subsequently cut out and sent to Bacon Donaldson for further examination). The flaw that Mark initially found was found to be very shallow, however a much larger flaw, about 4 or 5 mm long, was uncovered just below the surface. It was surmised that the flaw might have originated from some deoxidizing agent in the steel melt. *) We have the latest (and final) drawing of the Vacuum Tee from CERN. They will ship the first 22 Tees as soon as possible. We will be getting a total of 114 Tees, for 57 F/T assemblies. N.B. Our original share of the Tees was to be 110 but Roy asked for an increase. *) The two crosstalk setups are expected to be completed this week, both in terms of software and hardware, with the exception that the second pulse generator has not been delivered yet. The second pulse generator is expected in mid April. *) The impedance, resistance, and contact resistance measuring devices all work individually, but there remains a problem when trying to operate all three devices connected to the same I/O ribbon cable. John is working on a solution to this problem. *) There should be no problem fabricating shorting connectors from the samples that Margret obtained, according to Earnie (UVIC electronic shop). *) Terry has done the FEA analysis for the UVIC heater design, however the design should be tested with a real physical test setup. There remains some concern over the use of thermal grease to achieve adequate thermal contact between the heater plate and the flange. Roy is looking into the possibility of using some sort of solid flexible heat conducting sheet instead of the grease. More on this next week. *) The He leak detector has been sent to California for repair. Paul B. will fly to California next week for service training. *) Jobs for this week: - Wash the floor and install the shoe cleaning brush and sticky mats. - Continue working on electrical test setups. Agenda for next week: *** NEXT MEETING Tuesday 4 April at 10:30 *** ^^^^^^^^^^^^^^^^^^^^^ - Milestones - Alternatives to thermal grease for the UVIC heater - Steel delivery for remaining seal rings - Status of electrical test equipment - AOB