Characterization of the pulse shape is obviously one of the things we would like to get from a test beam run. Unfortunately, there is only about 5' of clearance in the radial direction away from the beam axis, since this area is inside the tunnel. Major questions regarding whether there will be too much background so close to the beam in order to see a signal. George points out that we can get around this, to some extent by doing a test without target and with target, but the target will, of course, produce some random beam spray itself. We can also monitor the signal as a function of Cerenkov angle.
Uncertainties remain regarding the signal in the near field.
George will confer with Provorov on this subject. Alice and Ilya will travel to SLAC c.