  The Code O-SUKI is an integrated 2-dimensional (2D) simulation program system
for a fuel implosion, ignition and burning of a direct-drive nuclear-fusion
pellet in heavy ion beam (HIB) inertial confinement fusion (HIF). The Code
O-SUKI consists of the four programs of the HIB illumination and energy
deposition program of OK3 (Comput. Phys. Commun. 181, 1332 (2010)), a
Lagrangian fluid implosion program, a data conversion program, and an Euler
fluid implosion, ignition and burning program. The OK3 computes the multi-HIBs
irradiation onto a spherical fuel target. One HIB is divided into many beamlets
in OK3. Each heavy ion beamlet deposits its energy along the trajectory in a
deposition layer depending on the particle energy. The OK3 also has a function
of a wobbling motion of the HIB axis oscillation, and the HIBs energy
deposition spatial detail profile is obtained inside the energy absorber of the
fuel target. The spherical target implosion 2D behavior is computed by the 2D
Lagrangian fluid code coupled with OK3, until just before the void closure time
of the fuel implosion. After that, all the data by the Lagrangian implosion
code are converted to them for the Eulerian code. The fusion Deuterium
(D)-Tritium (T) fuel and the inward moving heavy tamping material are imploded
and deformed seriously at the stagnation phase. The Euler fluid code is
appropriate to simulate the fusion fuel compression, ignition and burning. The
Code O-SUKI 2D simulation system provides a capability to compute and to study
the HIF target implosion dynamics.
