NOTES FOR MUCOOL MEETING 9.18/98 Present: R. Stefanski, F. Mills, D. Summers, D. Neuffer, Y. Pischalnikov, A. Bross, E. Black, G. Hanson, R. Fernow, K. Lee, A. Tollestrup Rick Fernow said he is returning to ICOOL to make a few changes. 1) Atomic screening will be represented by two adjustable parameters, 2) delta rays will be included, 3) a better step size algorithm will be used, and, 4) problems with decays will be fixed. He has talked to a number of people about finding a theorist who is familiar with scattering and screening. A number of people have been mentioned as possibly interested (H. Bethe??) but no productive contacts have been made. Al Bross is beginning to fix the parameters of a solenoid system for the NUCOOL measuring channel. There are three modules: two long bent solenoids which hold TPC's in their straight ends, and an rf module with two large coils which slide around the outer bore of the bent solenoids. The rf solenoids are 1m bore, 3T and 3 m long. It is assumed that the fields will be stable (known) to dB/B =1E-4 over a radius of 7.5 cm. Access to the interior of the rf solenoids is expensive. Al thought the coils around the rf section would be big and complex and wondered if there was a better way. The constraint seems to be that these coils must allow access to the rf and all other diagnostics so there has to be a significant amount of space between the coils radially. Kevin Lee has gotten DPGEANT running at UCLA and is having good success. He is doing simulations of diagnostic systems in the beam with Mylar windows and other material in the beam. This work is aimed at helping to design the diagnostics and other beam elements. HISTOSCOPE is not installed at UCLA, so it may be easier for him to eventually run the code in Paul's area of the FNAL system. Alvin was wondering if target tests for the BOONE, MINOS or MiniBOONE would be useful for us. They have high intensity beams and are looking at very high beam power densities, perhaps higher than ours. The pulses will be longer but they will be testing a variety of horn and target geometries. We should get in better contact with this work.