Commentary on a Conceptual Design of Transport Lines for a Heavy-Ion Inertial Fusion Power Plant

摘要

Some major system features are not stated but can be inferred. For example this is probably an engineering test facility, not a power plant driver, because the standoff from target to final magnet is only 5.0 m. The fusion target takes two-sided illumination with indirect drive using a total of 60 beam pulses: 10 pre-pulses (3.0 GeV) + 20 main pulses (4.0 GeV) from each side. On page 12 it's stated that the charge per beam pulse is 26.8 (micro)C, so we calculate pre-pulse: 20 x 3 GeV x 26.8 (micro)C = 1.608MJ, main pulse: 40 x 4 GeV x 26.8 (micro)C = 4.288MJ, total beam energy 5.896MJ. The beam ion mass ks 200 amu, so the species is Hg(sup +). Therefore the mid-pulse velocities are: pre-pulse v = .1773c = 5.316 x 10(sup 7) m/s, main pulse v = .2040c = 6.114 x 10(sup 7) m/s, On page 12 it is stated that the pre-compression pulse length is L(sub 0) = 10.0m, and compression is by a 'factor of order 20'. They infer a final pulse length of about .5 m and final durations pre-pulse (tau) (approx) .5/5.316 x 10(sup 7) = 9.4 ns; main pulse (tau) (approx) .5/6.114 x 10(sup 7) = 8.2 ms. The magnetic rigidity of the beam ions is (B(rho)) = (gamma)m v/e = (l-brace) 112.0 T-m - prepulse/129.5 T-m - mainpulse(r-brace).