Minutes of feedthrough meeting of 5 February, 2001. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Present: Pof, PB, GV, AD, MLenc, ML, RKK, MGF *) Milestones - Vacuum cable tests of the current stock is complete. We have at this point received 1650, returned (or about to return) 136, and paid for 1614. Pof will contact FCI to confirm that our tally agrees with theirs. - 13 VCR T-glands have arrived from CERN. - 120 RTD's for the ambient flange heater have arrived. One has been tested (and it worked...); the others will be tested as they are installed on the heater plates. RKK pointed out that the RTD wires should be strain relieved on the heater plate when mounted. Mark thinks that this could probably be implemeted at the same point (on the fuse case) where the power lines are strain relieved. *) Pof will provide PB with two slides for the LARG week summarizing the feedthrough construction status at UVIC. *) The ambient flange heaters are nearly ready to be manufactured. The only items holding this up are: - A small pocket needs to be milled out of each heater plate for the fuse PC board. - The fuse covers need to be manufactured. - The fuse PC boards need to be cut to size. - An assembly jig for the wiring needs to be made. Also concerning the heaters, but not holding up manufacture are: - Final word from BNL how the power bundle will exit the filter box. - Final word from BNL how the RTD wires are to be connected. Note that BNL is using a 3-wire RTD, whereas we are using a 4-wire RTD. *) PB is working on a prototype ambient flange heater (essentially identical to the production heaters) for thermal tests to be conducted on a feedthrough in the cold test station. Those tests are to be performed to determine the best operating paramters for the heaters. *) There is an ATLAS week scheduled for 3 -> 8 June at BNL. A number of our group should plan to attend, and spend some extra time at BNL to check out their feedthrough factory. *) PB has arranged with our purchasing department for the payment to HCC/Glasseal for the machining of the Timken steel. PB's note to Tom Muller on this is reproduced below: Hi Tom I have arranged with our purchasing dept at UVIC for GSP to bill us directly for US$32,300 for the machining of scrapped pin carrier blanks. They should use the same purchase order number as the completed pin carriers. The cost of the pin carriers has also been increased to reflect the added cost of the 304L material that GSP and HCC is now suppling for most (but not all) of the pin carriers. This is US$717.83 for the 7 row and US$808.08 for the 8 row pin carriers. Regards Paul Birney *) Pof has confirmed that our present stock of pigtails is sufficient to build all feedthroughs for one endcap, with the exception of the 10 T51 calibration cables that were returned to Axon last November for calibration. In response to an email sent to him by Pof, Laurent Serin of Orsay said that he has just this week received the test results for those 10 T51 cables, so presumably we should be getting them back soon. *) Mark is expecting to hear from BNL this week (wishful thinking...) on their shipping crate design. Meanwhile, Mark will construct a lid for our prototype shipping crate. *) Fiona Holness will begin work with us on Tuesday 13 February. +) Addendum to minutes of 29 January 2001: Mark was also present at the 30 January TIS video conference. Agenda for next week: ^^^^^^^^^^^^^^^^^^^^^ - Milestones - Vacuum Cable HiPot testing - AOB