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Alternative fast ignition concepts: Using KrF laser István B Földes, KFKI RIPNP, Hungary. KrF ignitors: Short wavelength, deep penetration without cone. The same amplifiers can be used with 20-30% increase of pump duration.
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Alternative fast ignition concepts: Using KrF laserIstván B Földes, KFKI RIPNP, Hungary KrF ignitors: Short wavelength, deep penetration without cone. The same amplifiers can be used with 20-30% increase of pump duration. Lower electron energy, higher efficiency: 1MeV from 1.8×1020W/cm2. Saturation of KrF amplifiers (6mJ/cm2): amplification of 1ps pulses may give the same energy but high power (nearly transform-limited pulse). Interferometric muliplexing needed: 2-beam may give 100J. Required intensity can be obtained in a single beam. Multiple beam focusing (F/32) of many (400) beams to a separate or to the same spot (r90m). Multiple beams on multiple spots: R=? assumes „corona ignition model” Multiple beam on single spot (or 2 spots) Critical issues: F/32 focusing requires 10% Help from self-focusing? electron transport in 3D ignition transport in 3D