What do we want to learn form the W HCal prototype ?
Slow neutrons and E-resolution, PFA, time-stamping
What simulations are still needed ?
At what beam energies shall we test the prototype ? List of priorities
What minimum size (lateral and longitudinal) is needed ?
Any constraints to equip CALICE module with W plates ?
Which active layers to be used, and when ?
What granularity of the active layers for the prototype ?
Tracking upstream of the prototype
Readout and DAQ
Possible schedule
Action list