The interaction of quasi-monoenergetic protons with pre-compressed inertial fusion fuels

Mahdavi, M.; Koohrokhi, T.; Azadifar, R.
August 2012
Physics of Plasmas;Aug2012, Vol. 19 Issue 8, p082707
Academic Journal
The interaction of a quasi-monoenergetic proton beam with a pre-compressed plasma is studied in the context of inertial fusion fast ignition (FI). Based on fundamental principles, a kinetic model is developed by considering hard collisions, nuclear scattering, and the contribution due to collective processes. The penetration depth, longitudinal straggling, and the transverse blooming are evaluated by solving the Boltzmann transport equation using the multiple scattering theory. The stopping power, transport scattering cross sections, and convenient expressions for the angular moments of the proton distribution function have been used in modeling the collisional proton transport in a three-dimensional (3D) Monte Carlo code. The transport of a proton beam with a quasi-monoenergetic energy =10 MeV is studied for pre-compressed deuterium-tritium plasma with an average density of ρ=400 g cm-3 and temperatures T=1 keV, 5 keV, and 10 keV. The net effects of multiple scattering are to reduce the penetration from 1.028 to 0.828 g cm-2 with range straggling ρΣR=0.044 g cm-2 and beam blooming ρΣB=0.272 g cm-2, for 10 MeV protons in a ρ=400 g cm-3 plasma at T = 5 keV. This model can be used for quantitatively assessing ignition requirements for proton fast ignition.


Related Articles

  • Numerical study of fast ignition of ablatively imploded deuterium–tritium fusion capsules by ultra-intense proton beams. Temporal, M.; Honrubia, J. J.; Atzeni, S. // Physics of Plasmas;Jul2002, Vol. 9 Issue 7, p3098 

    Compression and ignition of deuterium-tritium fuel under conditions relevant to the scheme of fast ignition by laser generated proton beams [Roth et al., Phys. Rev. Lett. 86, 436 (2001)] are studied by numerical simulation. Compression of a fuel containing spherical capsule driven by a pulse of...

  • Numerical simulations of self-pinched transport of intense ion beams in low-pressure gases. Rose, D. V.; Ottinger, P. F.; Welch, D.R.; Oliver, B.; Olson, C.L. // Physics of Plasmas;Oct99, Vol. 6 Issue 10, p4094 

    Studies the self-pinched transport (SPT) of intense ion beams in low-pressure background gases using numerical simulations and theoretical analysis. Use of the IPROP[Sup27] code; SPT of intense proton beams produced on Gamble II; Significance of the results of the study to ion-driven inertial...

  • Tertiary proton diagnostics in future inertial confinement fusion experiments. Cremer, S.; Verdon, C.P. // Physics of Plasmas;Nov98, Vol. 5 Issue 11, p4009 

    Proposes the energetic tertiary protons for the measurement of the fuel areal density of compressed deuterium-tritium. Analysis on the reaction of helium on the energetic knock-on deuterons; Production of the protons during the final stage of inertial confinement fusion implosions; Nuclear...

  • A simple unfold method for Rutherford scattering, intense ion-beam spectrographs. Fehl, D. L.; Leeper, R. J.; Kensek, R. P. // Review of Scientific Instruments;Oct92, Vol. 63 Issue 10, p4786 

    Elastic Rutherford scattering with subsequent momentum analysis has become a powerful tool for analyzing intense, pulsed light-ion beams for inertial confinement fusion studies. The ion spectrum is obtained by mathematical inversion of the data. This paper reports a product-integration solution...

  • Optimum Time Available for Fast Ignition in Inertial Confinement Fusion. Tabatabaei, M. J.; Ghasemizad, A. // International Review of Physics;Aug2009, Vol. 3 Issue 4, p219 

    An analytic model for the dynamics of fast ignition is studied for the case in which the proton beam heats the fuel by generating a subsonic heat wave. It shows that the temperature, the confinement parameter, and density of the hot spot required for ignition decrease with the proton range R....

  • Fast ignition of a compressed inertial confinement fusion hemispherical capsule by two proton beams. Temporal, Mauro // Physics of Plasmas;Dec2006, Vol. 13 Issue 12, p122704 

    A hemispherical conically guided indirectly driven inertial confinement fusion capsule has been considered. The fast ignition of the precompressed capsule driven by one or two laser-accelerated proton beams has been numerically investigated. The energy distribution of the protons is Gaussian...

  • Accelerating gradient improvement from hole-boring to light-sail stage using shape-tailored laser front. Wang, W. P.; Shen, B. F.; Xu, Z. Z. // Physics of Plasmas;2017, Vol. 24 Issue 1, p1 

    The accelerating gradient of a proton beam is a crucial factor for the stable radiation pressure acceleration, because quickly accelerating protons into the relativistic region may reduce the multidimensional instability grow to a certain extent. In this letter, a shape-tailored laser is...

  • Implosion symmetry and pR measurements on the National Ignition Facility from nascent 27-31 MeV tertiary protons (invited) (abstract) Petrasso, Richard D. // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p527 

    Presents an abstract of a paper which focused on tertiary protons with birth energies from approximately 27 to 30.8 MeV that result from the implosion of ignition-scale inertial confinement fusion targets, such as those planned for the National Ignition Facility (NIF). Representative cases for...

  • Study of indirectly driven implosion by x-ray spectroscopic measurements. Nishimura, H.; Kiso, T.; Shiraga, H.; Endo, T.; Fujita, K.; Sunahara, A.; Takabe, H.; Kato, Y.; Nakai, S. // Physics of Plasmas;Jun95, Vol. 2 Issue 6, p2063 

    Investigates fusion pellet implosion by laser generated x rays by means of time integrated spectroscopic measurements. Stable compression of the fuel until the beginning of pusher deceleration by collision with a reflected shock wave from the pellet center; Shell disintegration in the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics