Minutes of the E895 meeting Graduate Chemistry Rm 403, SUNY Stony Brook Monday 8/28/95 Attending: MG - Mark Gilkes JR - Juan Romero JA - John Alexander RM - Bob McGrath HL - Heng Liu SG - Steve Gushue JC - Jerry Chance AJ - N. Ajitanand EL - Erwan LeBras RS - Rulin Sun TPC: ==== HL - We have cabled 15 of the low voltage stick power cables. It took all of one morning to do this. The magnetic field mapping at 1.0T is finished after three shifts. The magnet mapper can now be packed up and shipped back to LBNL. MG - The TPC placement simulations are completed at 1.0T and 0.5T. The final decisions about field strength may not be made for a while, but the TPC should be centered in a magnet rotated at 2 degrees for the 4.0 AGeV beam, and perhaps ~ 3.5 degrees for 2.0 AGeV beam, if we use the 1.0T magnetic field. SG - I want to get the liquid nitrogen system up and running. So scheduling of fillups has to be set up. By the end of the week, something will be in place. Maybe three tanks. JC - This is of interest to the MUSIC people. TARGET ASSEMBLY: ================ SG - We have new real estate inside the optics volume with the old re-entrant removed. The various design considerations may be different for E895 and E910, but the default E895 design may be a fallback for E910. There was much discussion about the types and thicknesses of targets needed. The E910 experiment will require a larger number of targets than E895. SG - We had 1% interaction just from beamline-related stuff around the target in previous experiments. So the area surrounding the target is a concern for the design. JA - Almost certainly, one will need many slots for targets. SG - Mark and I should be able to finalise the design this week. MUSIC: ====== JC - The field cages are currently in the LGD hut, which is a nice dry environment. We have taken one endcap off in order to remove them. It seems that there are a few loose wires, but otherwise the cages are in good shape and may be ready to go. JC - In the next few days, with the help of Joe Scaduto and the riggers, we will put the MUSIC tank back on the original steel support, adjusted for beam height. MG - How does the positioning of MUSIC on the original support work with the LGD rails ? JC - MUSIC cannot straddle the rails, but will operate in front, between or behind them. Probably behind them is best, for acceptance reasons. We need to complete acceptance calculations. MG - Do you have enough manpower ? JC - At the moment, yes. But we are concerned about what happens when we leave. MG - We should discuss this. JR - Jerry has been in close touch with Walter. We only have 48 of the MUSIC shapers right now, but all 96 preamps. So we can close the detector. Walter has said that he can arrange for us to get the remaining shapers. JC - The MUSIC cabling remains an issue. If Juan and I are still here when the TPC fiber optics cables are strung, we would like to assist and perhaps get the MUSIC cabling done at that time. MG - Unfortunately we will not be able to string fiber optics until we get either new cables or extensions. This won't be until October. Prepared by: Mark Gilkes