  Future high-power (10 - 20 MW) hadron accelerators offer many unique
opportunities for fundamental science and nuclear applications. With the
completion of Proton Power Upgrade (PPU) at 2.8 MW [1] and European Spallation
Source (ESS) at 5 MW [2], the attention will be focused on the next high-power
machine in hadron accelerator community. Charge exchange injection into a
synchrotron using diamond stripper foils offers great advantage over direct
proton acceleration. However, there are clear limitations associated with foil
sublimation above critical beam power density and beam loss due to scattering
(~10 rem/hour at 10 MW for SNS).
