Real Photon Collaboration Engineering Meeting 4/2/02 Minutes Attendees: W. Olson, T. Weber, J. Weisend, M. Palrang, L. Keller, P. Bosted Items Discussed: 1. The contract is in place for the LBL magnetic analysis of the E-160 spectrometer magnet configuration. The RFQ for the Duke University analysis was sent out this week. Some additional paperwork is required before the contract can be placed with Duke. M. Palrang has provided updated drawings to both Duke and LBL. 2. The response to the microwave tube RFQ has come in. The exact item being ordered still needs to be verified. Once this is done the order can be placed. 3. It is probably better to design a new simpler collimator to replace DC2. This may provide us with a simpler more reliable system in the end. R. Arnold, D. Waltz and P. Bosted will meet to discuss this possibility. 4. P. Bosted has rerun the GEANT simulations for E160 and it now appears that the backgrounds may be less than originally thought. The results is that less graphite may be required in D3. More study is underway Decisions Reached 1. With the leaving of K. Baird from SLAC, the radiation safety analysis for E160 will most likely be handled by M. Olson with training and advice from L. Keller and R. Arnold. Ongoing Action Items 1. J. Weisend will work with D. Crabb and R. Principe to develop a detailed drawing showing the dilution refrigerator and the proposed superconducting magnet 2. Number of cables required from the counting house to ESA. P. Stiles and A. Angelov will start tabulating these numbers based on the data acquisition memo and additional information from the collaboration. 3. P. Bosted will continue the physics simulations of the proposed change to the RPC design. 4. . The interaction of the LASS magnet and all its iron with the E161/ E159 7-T target magnet needs to be carefully modeled using a 3-D field simulation. 5. Serious engineering of the shielding and earthquake supports associated with the LASS magnet must be started. 6. T. Weber will investigate other E160 target materials to replace the Pb and Au for example Tantalum or Platinum J. Weisend