Minutes of Feedthrough Meeting of 02 July 02 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Present: Pof, AD, ASD Milestones: - ft48 and ft49 final electrical tests completed. - ft50 (final HEC) cold tested and passed. - ft51 was pigtailed. This is the final feedthrough we can build with the current stock of pigtails. *) PB sent the following report from CERN on Friday 26 June: Bob (Hackenburg) will be here on Monday. For the PT100 problem for BNL, it seems that all of the RJ11 connectors were wired backwards. I have set up for the cutting of the lower funnel tubes. Aboud would like to try cutting the tubes with the FTs bolted to the crate bottom. I have made some sketches for brackets to hold the CF flange while cutting. I also had to modify two of the bellows support brackets. These items are in the machine shop shop here and will be ready next Tuesday afternoon. The cryostat was rotated from the vertical to the horizontal. On Monday scaffolding will be put up on all four sides of the cryostat. We will remove one chimney for each of a HV feedthrough and a standard feedthrough as well as the outer cover to the cryostat. We will then cut one funnel tube and check it for length. The positions of the standard feedthroughs are fixed, but the positions of the Specials and HECs are still been checked. The method of numbering feedthroughs and modules may have been different between the different groups, as well as counting clock'wise vs counter clock'wise. The two crates of feedthroughs have not arrived yet. *) PB sent the following report from CERN on Monday 1 July: Aboud would like you to bring a heater plate with you if that is possible. (Aaron will send two heater plates to Roy today by courier.) Aboud said he will be sending out an e-mail tonight giving the location of the drawing showing the installed locations of the feedthroughs. The change that was just made was the location of the HEC - Special feedthroughs at the 10:00 and 5:00 position. It seems to me that this will make the cables of the HEC feedthroughs travel farther to reach their modules. I thought that the length was set very accurately. Is it possible to move a HEC feedthrugh over one position? Aboud said that someone looked into it and said it was OK. BNL is putting Nylon washers under the warm cables. I am sure that Aboud does not have any washers, do we have any spare that you could bring or send over to CERN. Nobody knows how the washers will stay on the screws in the 3:00 to 1:00 or 9:00 to 11:00 positions. (A few packs of nylon washers will be included with the package of heater plates.) BNL have installed the warm cables on one feedthrough. They said it was very difficult. Bob is currently doing the TDR testing of the cables. *) Fiona, Wendy, and pof are leaving for CERN today. *) No feedthrough meetings are planned for 8 July or 15 July since most of the crew will be at CERN or on holidays. Aaron will send out a report (milestones, etc) each of those two weeks summarizing the previous week's events. Next feedthrough meeting will be Monday 22 July.