Integrated fast ignition simulation of cone-guided target with three codes

Hitoshi Sakagami (1) , T. Johzaki (2) , H. Nagatomo (2) , K. Mima (2)

1 Computer Engineering
2 Institute of laser Engineering

The fast ignition approach to inertial fusion energy has been investigated by experiments with cone-guided targets [1], because this scheme is expected to reduce criteria for fuel burning. Simulations should play an important role in estimating the scheme performance, and the scientifically exciting new physics of the fast ignition should be self-consistently described in computations. Thus we must consider 1) overall fluid dynamics of the implosion, 2) laser-plasma interaction and super hot electron generation, and 3) super hot electron energy deposition within the core. It is, however, impossible to simulate all phenomena with a single code, and we must simulate each phenomenon with individual codes and integrate them. Recently, we have started the Fast Ignition Integrated Interconnecting code (FI 3 ) project in which the ALE hydro code (PINOCO)[2], the collective PIC code (FISCOF1)[3] and the relativistic Fokker-Planck code (RFP)[4] collaborate each other with data transfer via the computer networks. Since communication among these codes is very straightforward, we have designed a lightweight protocol, Distributed Computing Collaboration Protocol (DCCP), to transfer data. Typical scenario in FI 3 project is summarized as follows: PINOCO computes implosion dynamics, including the absorption of a main implosion laser. FISCOF1 obtains density profile at the maximum compression from PINOCO and introduces plasma corresponding to that profile into the PIC system. Then an ultrahigh intense ignition laser is launched into the plasma, and we can simulate laser-plasma interactions under realistic conditions in PIC simulations. FISCOF1 computes generation of hot electrons by the laser-plasma interaction, and regularly sends distribution functions of hot electrons to RFP. RFP receives the distribution functions, and treats them as a time dependent source term of hot electrons. RFP also gets the bulk plasma profile from PINOCO, and simulates the core heating and fusion burning processes under obtained conditions. We will present results of integrated fast ignition simulations that are performed by three codes, and demonstrate the capability of FI 3 . [1] R. Kodama, et al., Nature 418 (2002) 933. [2] H. Nagatomo, et al., IAEA-CN-94/IFP/07 (2002). [3] H. Sakagami, K. Mima, proc of IFSA2001 (Elsevier, 2002) 380. [4] T. Johzaki, et al., Fusion Sci. Technol. 43 (2003) 428.

Domaines: Physique des plasmas [physics.plasm-ph]

Hitoshi Sakagami, T. Johzaki, H. Nagatomo, K. Mima. Integrated fast ignition simulation of cone-guided target with three codes. 2004. ⟨hal-00001861⟩