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Study on Compression of ICF Fuel in Rocket Model

Received: 21 August 2017     Accepted: 11 September 2017     Published: 20 October 2017
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Abstract

Compression of Inertial Confinement Fusion (ICF) fuel as required by Lawson Criterion has been of immense value in ICF studies. In this work, the order of compression has been studied on Rocket Model because a high-order reaction force responsible for compression may be seen to act as a rocket motion. It has been seen that the order of compression of lighter fuel such as D-T may be more effective if irradiated by high power Nd laser. The shocks produced as the reaction (Rocket effect) to the surface ablation generated by pulsed laser beams, compress the fuel which is estimated to be effective when the ratio of initial mass to the accelerated one is of the order of 5. The maximum achievable compression by a single strong shock is not more than 4 for a monatomic gas. For weak coalescing shocks to achieve adiabatic compression, the ablation efficiency is found to be maximum when target velocity equals nearly twice the ablation velocity. In such a case, the implosion efficiency of Rocket Model is found to be about 67 percent; neglecting heat loss.

Published in American Journal of Physics and Applications (Volume 5, Issue 6)
DOI 10.11648/j.ajpa.20170506.14
Page(s) 95-98
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Inertial Confinement Fusion (ICF), Lawson Criterian, Compression, Ablation, Implosion Efficiency, Rocket Model, Shock Wave, Mach Number, Fermi Degenerate Adiabat

References
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[2] J. J. Duderstadt and G. A. Mosses, ICF, John Wiley and sons, (1982).
[3] J. D. Lindl, R. L. McCrory and E. Michael Campbell, Physics Today, American Institute of Physics, 32-35 (September 1992).
[4] R. Betti and O. A. Hurricane, Nature Physics 12, 435–448 (2016).
[5] E. L. Vold, R. M. Rauenzahn, C. H. Aldrich, K. Molvig, A. N. Simakov, and B. M. Haines less, Physics of Plasmas 24, 042702 (2017).
[6] R. S. Craxton, K. S. Anderson, T. R. Boehly, V. N. Goncharov, D. R. Harding, Physics of Plasmas 22, 110501 (2015).
[7] S. M. Alastair, P. Shon, Kevin L. B. Kevin, M. C. Peter, F. Jonathan, R. D. Thomas, J. W. Kuang-Jen, L. K. Margaret, E. S. Michael, F. Mike, N. Abbas, A. H. Omar, Journal of Physics: Conference Series, 717, 012038 (2016).
[8] B. H. Ripin, R. Decoste, S. P. Obenschein, S. E. Bonder, E. A. McLean, F. C. Young, R. R. Whitlock, C. M. Armstrong, J. Grun, J. A. Stamper, S. H. Gold D. J. Nagel, R. H. Lehmberg and J. M. McMahon, Physics Fluids, 23, 1012 (1980).
[9] D. B. Schaeffer, W. Fox, D. Haberberger, G. Fiksel, A. Bhattacharjee, D. H. Barnak, S. X. Hu, and K. Germaschewski Phys. Rev. Lett. 119, 2-14 (July 2017).
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    Vijay Kumar Jha. (2017). Study on Compression of ICF Fuel in Rocket Model. American Journal of Physics and Applications, 5(6), 95-98. https://doi.org/10.11648/j.ajpa.20170506.14

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    Vijay Kumar Jha. Study on Compression of ICF Fuel in Rocket Model. Am. J. Phys. Appl. 2017, 5(6), 95-98. doi: 10.11648/j.ajpa.20170506.14

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    AMA Style

    Vijay Kumar Jha. Study on Compression of ICF Fuel in Rocket Model. Am J Phys Appl. 2017;5(6):95-98. doi: 10.11648/j.ajpa.20170506.14

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  • @article{10.11648/j.ajpa.20170506.14,
      author = {Vijay Kumar Jha},
      title = {Study on Compression of ICF Fuel in Rocket Model},
      journal = {American Journal of Physics and Applications},
      volume = {5},
      number = {6},
      pages = {95-98},
      doi = {10.11648/j.ajpa.20170506.14},
      url = {https://doi.org/10.11648/j.ajpa.20170506.14},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpa.20170506.14},
      abstract = {Compression of Inertial Confinement Fusion (ICF) fuel as required by Lawson Criterion has been of immense value in ICF studies. In this work, the order of compression has been studied on Rocket Model because a high-order reaction force responsible for compression may be seen to act as a rocket motion. It has been seen that the order of compression of lighter fuel such as D-T may be more effective if irradiated by high power Nd laser. The shocks produced as the reaction (Rocket effect) to the surface ablation generated by pulsed laser beams, compress the fuel which is estimated to be effective when the ratio of initial mass to the accelerated one is of the order of 5. The maximum achievable compression by a single strong shock is not more than 4 for a monatomic gas. For weak coalescing shocks to achieve adiabatic compression, the ablation efficiency is found to be maximum when target velocity equals nearly twice the ablation velocity. In such a case, the implosion efficiency of Rocket Model is found to be about 67 percent; neglecting heat loss.},
     year = {2017}
    }
    

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    N1  - https://doi.org/10.11648/j.ajpa.20170506.14
    DO  - 10.11648/j.ajpa.20170506.14
    T2  - American Journal of Physics and Applications
    JF  - American Journal of Physics and Applications
    JO  - American Journal of Physics and Applications
    SP  - 95
    EP  - 98
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    SN  - 2330-4308
    UR  - https://doi.org/10.11648/j.ajpa.20170506.14
    AB  - Compression of Inertial Confinement Fusion (ICF) fuel as required by Lawson Criterion has been of immense value in ICF studies. In this work, the order of compression has been studied on Rocket Model because a high-order reaction force responsible for compression may be seen to act as a rocket motion. It has been seen that the order of compression of lighter fuel such as D-T may be more effective if irradiated by high power Nd laser. The shocks produced as the reaction (Rocket effect) to the surface ablation generated by pulsed laser beams, compress the fuel which is estimated to be effective when the ratio of initial mass to the accelerated one is of the order of 5. The maximum achievable compression by a single strong shock is not more than 4 for a monatomic gas. For weak coalescing shocks to achieve adiabatic compression, the ablation efficiency is found to be maximum when target velocity equals nearly twice the ablation velocity. In such a case, the implosion efficiency of Rocket Model is found to be about 67 percent; neglecting heat loss.
    VL  - 5
    IS  - 6
    ER  - 

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Author Information
  • Central Department of Physics, Tribhuvan University, Kathmandu, Nepal

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