Merit of Heavy Ion Beam (HIB):
Beam stopping power is simple,
well known & classical.
Beam particles penetrate materials
straight.
100% beam energy is absorbed by
material.
volumetric beam energy deposition.
Beam parameter is precisely controlled: - pulse shape, particle energy,
beam axis, ...
- beam axis wobbling with a high frequency, ...
HIB generation effciency is high
(~30-40%) from electricity to HIB.
accelerator physics is matured, except
high current ~ 1KA.
Target Physics:
density scale length is ~ 500micron meter or
more. - contribute to the Rayleigh-Taylor
(R-T) instability mitigation in the short-wavelength modes.
wobbling HIBs contribute to smooth the
implosion nonuniformity & the R-T instability growth reduction.
density valley is created by the HIBs
energy deposition inside the target material. In the density valley,
radiation can be confined.
required target gain (=fusion energy
ouput / input energy(~MJ)) ~ 30-100.
HIB transport Physics:
HIB has ~KA. Charge neutralization is needed. - Dilute plasma (~debris, target,
etc) in a reactor chamber helps to neutralize the HIB charge. - Additional m-long annular or wall
insulator ceramics helps to neutralize the HIB charge. - Additional m-long annular or wall
insulator ceramics helps to absorb exhaust dangerous gas moving up to
the accelerator.
Electron temperature, neutralizing the HIB
charge, may increase at the target vicinity.
