2 Parameters of the Bent Solenoid Channel

Using the analytic estimates developed for the emittance diagnostic channel for the nal-stage cooling experiment, we conclude that diagnostics for both an initial-stage cooling experiment, and for the targetry experiment could be performed with a bent solenoid of 1.25 T eld strength. The solenoid bore would need to be at least 40 cm for either study. The targetry study is less demanding in accuracy of momentum analysis, and could be accomplished with a smaller bend angle to the solenoid, 0.1 rad, compared to 0.25 rad as appears more appropriate for an initial cooling study. The small bend angle permits a relatively large bend radius, which in turn implies that a relatively weak guiding dipole eld will suuce. That guiding dipole eld could be provided by tilting the coils in the bend region, which would commit the system to a single central momentum. The cost of such magnet systems is estimated to be less $1M per bend, including the straight sections needed for eld uniformity over the TPC's. The cost of the magnets is about half that for a diagnostic channel of nal-stage cooling. Some brief remarks about instrumentation are given.