Minutes of feedthrough meeting of 6 May, 2002. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Present: Pof, FH, PB, WW, RKK *) Milestones: - The bellows of ft39 has been removed and the vacuum cables extracted. Removal of the funnel for extraction of the pigtail cables is still in progress. ft39 had failed its ambient leak test last week with a 7.5 10^-9 mbar-l/s leak in the cold flange. - ft40 was welded and passed its cold tests. - ft41 cabling was finished and was also welded. Cold tests of ft41 were done today (Monday 6 May); there was a short between two opposite channels (23 and 24) on slot 6. This is the classic failure mode of many of the vacuum cables from the 27 November 2000 batch, from which this feedthrough was made. All other tests passed. The bellows will be removed and the offending vacuum cable(s) replaced. - Two flanges were welded. There remain only two more pair of flanges to weld to reach a total of 55 pairs, plus one more cold flange to replace the failed cold flange of ft39. - The 155 pigtails that arrived 23 April have all been processed. One of the pigtails arrived with no label on either the ATI or micro-D connector, although the box it was contained in was labeled with S/N 5877. Pof has asked Laurent Serin if the cable should be returned to Axon. There remain only 71 pigtails to come (12 T47, 28 T48, 1 T49, 30 T52) plus one (T48 S/N 6194) that was returned earlier to Axon for repair. *) Paul Birney will be traveling to CERN for a period of two weeks to assist Aboud with feedthrough installation preparation work. The date of Paul's departure is tentatively set at 21 June. Fiona, Wendy, and pof will be going to CERN, tentatively on 2 July, to assist Aboud with feedthrough installation. Fiona will remain at CERN for six to eight weeks, while Wendy and pof will return after two weeks. *) Neil is putting the "Mate & Lock" connectors onto the power lines of the ambient flange heaters. The connection of the RJ11 plugs to the RTD's require that a short length of solid 24 AWG wire be soldered onto the end of the RTD wires in order that a reliable crimp connection be made to the RJ11. An order has been placed (Tuesday 7 May) with BAY Associates for 250 feet of solid 24 AWG insulated with Kapton wrap to a final OD of 0.040 inches. Delivery time is two weeks. Appropriate sized stripping tools (No-Nik) have also been ordered. A testing station for the ambient flange heaters has been designed, but must still be built. Agenda for next week ^^^^^^^^^^^^^^^^^^^^ - Milestones - Plans for the week - AOB