Patent ID: 8604722

Claim:
A device for reducing the emittance of a charged particle input beam, the particles in the input beam having a first average particle energy while traveling along a fast direction, the device comprising: a container defining a chamber; an external beam pipe in fluid communication with the chamber; the beam pipe configured with respect to the first direction so as to receive the particles and to admit them into the chamber as they travel along the first direction; a frictional cooling channel in fluid communication with the chamber and configured along a second direction, the frictional cooling channel having an acceptance; an absorber positioned within the chamber for reducing the average energy of the particles of the input beam; a power supply in conductive communication with a voltage distribution subsystem, for distributing a voltage within the device, the subsystem in conductive communication with the absorber; a transverse focusing subsystem, for transversely focusing the particle beam within the device; and wherein the absorber, power supply, the voltage distribution subsystem, and the transverse focusing subsystem are configured so as to reduce the average particle energy a desired amount to a second average particle energy, to create a particle turn-around within the chamber, and to redirect the input beam to a second direction as an output beam incident on the frictional cooling channel, and wherein the second average energy of the output beam particles substantially match the acceptance of the frictional cooling channel.