Tr. Clark et Hm. Milchberg, LASER-DRIVEN-IMPLOSION OF A CYLINDRICAL PLASMA, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(3), 1998, pp. 3417-3422
We present what to our knowledge is the first time-resolved measuremen
t of the electron density profile of a laser-driven concentric implosi
on; Cylindrically symmetric plasmas are driven by two spatially coinci
dent line-focused laser pulses. If a plasma channel is allowed to form
after the first pulse, the second pulse drives an inward compression
wave which converges on the channel axis and later relaxes. The two-pu
lse absorption and ionization can significantly exceed that due to a s
ingle pulse of the same total energy, with the second pulse being almo
st totally absorbed.