Minutes of feedthrough meeting of 23 September, 2002. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Present: Pof, PB, FH, ML *) Milestones: - ft54 (the second FCAL) has been cold tested, and the final cross talk tests have been completed. - ft52 is being cold tested today (23 September). *) Laurent Serin provided the following information regarding the remaining pigtail cables in a 26 September email: - The 4 T48 you shipped to Orsay are at Axon but up to now we have no date for return after repair. - I have 6 T48 at LAL and not shipped to you because : - One had a missing measurement - The 5 others are correct for time measurement criterias but have one channel 5 % off for the amplitude, always channel 32. My guess is a bad contact on the setup not the cable but I have no way to measure it at LAL. Laurent's email was followed a few hours later with another: I have finally find a way to measure manually the T48s not with a very good accuracy but enough to reproduce Axon measurement observation if any (5 of them had the amplitude of channel 32 lower by 5 % in the axon measurement) Today I have not observed such an effect. For the last one the final measurement at Axon was missing, I have not observed any problem in my measurement. So my suggestion will be to ship you these 6 harnesses and maybe with your setup can measured them again before using them. Do you agree ? I have responded that the six T48 pigtail cables should be shipped to us, and we will do full cross talk as well as precision resistances tests on the cables before installing them into our final feedthrough ft53. *) Aboud sent us an email informing that the pedestal large holes will be shifted by 3.5mm external relative to the f-t warm flange axis. He asks whether this shift will be in conflict with the heaters or other components installed on the warm flange periphery. I replied that there are two heaters already at CERN, and Aboud should feel free to use them to check the fit. Depending on the exact nature of the shift, it could indeed be tight. *) We had a discussion on the inventory of spare parts that will be left over after completion of the last feedthrough. Although we obviously must keep some stock for the possibility of future repair work, we might consider allowing some components (eg, pincarriers) to be sold; there has already been some interest expressed by outside groups. We also must decide how much of the building jigs and test equipment should be kept intact for possible repair work. Pof will check with Bob Hackenburg on BNL's plans for future repair readiness. *) Twelve feedthroughs are to be shipped to Geneva on Friday 4 October, to arrive while pof and Fiona are present at CERN. Agenda for next week ^^^^^^^^^^^^^^^^^^^^ - Milestones - Plans for the week - AOB