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Collisional effects on fast electron generation and transport in fast ignition

Published online by Cambridge University Press:  09 March 2012

H. Sakagami ,
K. Okada ,
Y. Kaseda ,
T. Taguchi  and
T. Johzaki
H. Sakagami*
Affiliation:
Fundamental Physics Simulation Division, National Institute for Fusion Science, Oroshi-cho, Japan
K. Okada
Affiliation:
Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
Y. Kaseda
Affiliation:
Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
T. Taguchi
Affiliation:
Department of Electrical and Electronics Engineering, Setsunan University, Neyagawa, Japan
T. Johzaki
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Japan
*
Address correspondence and reprint requests to: H. Sakagami, Fundamental Physics Simulation Division, National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan. E-mail: sakagami.hitoshi@nifs.ac.jp
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Abstract

As the binary collision process requires much more computation time, a statistical electron-electron collision model based on modified Langevin equation is developed to reduce it. This collision model and a simple electron-ion scattering model are installed into one-dimensional PIC code, and collisional effects on fast electron generation and transport in fast ignition are investigated. In the collisional case, initially thermal electrons are heated up to a few hundred keV due to direct energy transfer by electron-electron collision, and they are also heated up to MeV by Joule heating induced by electron-ion scattering. Thus the number of low energy component of fast electrons increase than that in the collisionless case.

Keywords

Collision modelCone-guided targetFast ignitionPIC simulation
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 2 , June 2012 , pp. 243 - 248
Copyright
Copyright © Cambridge University Press 2012

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References

REFERENCES

Azechi, H. & Firex Project (2008). The FIREX program on the way to inertial fusion energy. J. Phys. Conf. Ser. 112, 012002.CrossRefGoogle Scholar
Cohen, B.I., Divol, L., Langdon, A.B. & Williams, E.A. (2006). Effects of ion-ion collisions and inhomogeneity in two-dimensional kinetic ion simulations of stimulated Brillouin backscattering. Phys. Plasmas 13, 022705.Google Scholar
Johzaki, T., Sakagami, H., Nagatomo, H. & Mima, K. (2007). Holistic simulation for FIREX project with FI3. Laser Part. Beams 25, 621–629.CrossRefGoogle Scholar
Johzaki, T., Sentoku, Y., Nagatomo, H., Sakagami, H., Nakao, Y. & Mima, K. (2009). Core heating properties in FIREX-I — Influence of cone tip. Plasma Phys. Contr. Fusion 51, 014002.CrossRefGoogle Scholar
Johzaki, T., Nagatomo, H., Sunahara, A., Cai, H.B., Sakagami, H. & Mima, K. (2010). Integrated simulations of core heating in cone-guiding fast ignition FIREX-I. J. Phys. Conf. Ser. 244, 022040.CrossRefGoogle Scholar
Jones, M.E., Lemons, D.S., Mason, R.J., Thomas, V.A., Winske, D. (1996). A grid-based Coulomb collision model for PIC Codes. J. Comput. Phys. 123, 169–181.CrossRefGoogle Scholar
Manheimer, W.M., Lampe, M. & Joyce, G. (1997). Langevin representation of Coulomb collisions in PIC simulations. J. Comput. Phys. 138, 563–584.CrossRefGoogle Scholar
Nakamura, T., Sakagami, H., Johzaki, T., Nagatomo, H. & Mima, K. (2006). Generation and transport of fast electrons inside cone targets irradiated by intense laser pulses. Laser Part. Beams 24, 5–8.CrossRefGoogle Scholar
Nakamura, T., Mima, K., Sakagami, H., Johzaki, T. & Nagatomo, H. (2008). Generation and confinement of high energy by irradiation of ultra-intense short laser pulses onto cone targets. Laser Part. Beams 26, 207–212.CrossRefGoogle Scholar
Sakagami, H. & Mima, K. (2004). Interconnection between hydro and PIC codes for fast ignition simulations. Laser Part. Beams 22, 41–44.CrossRefGoogle Scholar
Sakagami, H., Johzaki, T., Nagatomo, H. & Mima, K. (2006). Fast ignition integrated interconnecting code project for cone-guided targets. Laser and Part. Beams 24, 191–198.CrossRefGoogle Scholar
Sakagami, H., Johzaki, T., Nagatomo, H. & Mima, K. (2009). Generation control of fast electron beam by low density foam for FIREX-I. Nucl. Fusion 49, 075026.CrossRefGoogle Scholar
Sentoku, Y. & Kemp, A.J. (2008). Numerical methods for particle simulations at extreme densities and temperatures: Weighted particles, relativistic collisions and reduced currents. J. Comput. Phys. 227, 6846–6861.CrossRefGoogle Scholar
Taguchi, T., Antonsen, T.M. Jr., Palastro, J., Milchberg, H. & Mima, K. (2010). Particle in cell analysis of a laser-cluster interaction including collision and ionization processes. Opt. Expr. 18, 2389–2405.CrossRefGoogle ScholarPubMed
Takizuka, T. & Abe, H. (1977). A binary collision model for plasma simulation with a particle code. J. Comp. Phys. 25, 205–219.CrossRefGoogle Scholar