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Power Balance Consideration in the Design of Indirectly Driven Targets

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Plasma Science and Technology 2013年第6期15卷 506-510页

作者： Masoumi MAHBOOBEH ghasemizad abbas Gholamzadeh LEILA Physics Department Faculty of ScienceGuilan University Physics Department Yazd University

A preliminary design for a heavy ion driver inertial fusion（HIDIF） target is presented. The effect of target material and dimensions on transfer efficiency and symmetrical irradiation in the hohlraum are *** analysis led to the evaluation of optimal target materials and dimensions to achieve a positive power balance of an ICF power *** results show that the best choice is a high Z material for cavity wall materials and a low Z material for the capsule *** is concluded that for achieving the highest transfer efficiency and best symmetrization we need an area ratio between 5≤A2/A1≤9.

关键词： heavy ion beam indirect drive transfer efficiency symmetrization

Energy Gain Investigation in Fast Ignition ICF with Electron Ignition Beam by Changing Fuel Characteristics

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Chinese Physics Letters 2014年第2期31卷 34-36页

作者： Moosavi Mohadeseh Ahmadi Masoume ghasemizad abbas Department of Physics University of Guilan Rasht Iran

Fast ignition is a method in inertial confinement fusion （ICF） in which an ignition spark in pre-compression fuel is formed by an ultra-intense laser beam. In applying this method, a hot spot is built by relative electrons which are produced by the ultra-intense laser beam. For a better understanding, a fuel energy gain curve based on density is drawn and it can be observed that the ignition by an electron beam has the maximum energy gain. The maximum energy gain has been observed in equimolar DT fuel with a density of 500g/cma and in fuel with tritium （10%） with a density of 1000g/cm^3.

关键词： Fuels

Investigation of Fuel Energy Gain for Tritium-Poor Fuels in Fast Ignition Fusion Approach

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Plasma Science and Technology 2013年第10期15卷 996-1001页

作者： Mohadeseh MOOSAVI abbas ghasemizad Mohamad Jafar TABATABAEI Physics Department University of Guilan

One of the most fascinating ignition schemes for the inertial fusion energy that might be feasible is fast ignition. Its targets are ignited on the outside surface so there is no need to low density and high temperature center is required by central hot spot ignition. Fast ignition concept is noteworthy for a simple but fundamental reason： In principle it requires less total energy input to achieve ignition. In this paper, fuel energy and fuel energy gain of nearly pure deuterium capsule are calculated. This capsule is ignited by a deuterium-tritium seed, which would reduce the tritium inventory to a few percentages. The variations of fuel energy gain versus fuel density have been studied and submitted. On the basis of different physical parameters the following results of the investigation are presented and discussed. The energy gain curves for different tritium concentrations are found and limiting gain curves are derived. Finally, tritium-poor fast ignitor is compared to equimolar deuterium-tritium fast ignitor.

关键词： fast ignition DT seed tritium-poor

Non-equilibrium ignition criterion for magnetized deuterium–tritium fuel

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Nuclear Science and Techniques 2019年第4期30卷 132-142页

作者： E.Ghorbanpour A.ghasemizad S.Khoshbinfar Department of Physics Faculty of Science University of Guilan

In this paper, non-equilibrium ignition conditions for magnetized cylindrical deuterium–tritium plasma in the presence of an axial magnetic field have been investigated. It is expected that temperature imbalance between ions and electrons as well as the axial magnetic field will relax the threshold of ignition ***, ignition conditions for this model are derived numerically involving the energy balance equation at the stagnation point. It has been derived using parametric space including electron and ion temperature(T_e, T_i), areal density(q R), and seed magnetic field-dependent free parameters of B/q, mB, and BR. For B/ρ 0.002 g cm^(-2), ρR> 0.25 g cm^(-2), and ρR > 0.02 g cm^(-2),respectively. The practical equilibrium conditions also addressed which is in good agreement with the corresponding one-temperature magnetized mode proposed in previous studies. Moreover, it has been shown that the typical criterion of BR ≥(6.13–4.64) × 10~5 G cm would be expectable. It is also confirmed that the minimum product of areal density times fuel temperature in equilibrium model is located in the range of T = 6–8 keV for all these free parameters, depending on the magnitude of the magnetic field. This is the entry point for the non-equilibrium model consistent with equilibrium model.

关键词： Magnetized plasma Two-temperature model Ion-electron non-equilibrium Axial magnetic field Ignition criteria

Fusion Energy and Stopping Power in a Degenerate DT Pellet Driven by a Laser-Accelerated Proton Beam

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Communications in Theoretical Physics 2016年第6期65卷 761-766页

作者： M.Mehrangiz A.ghasemizad S.Jafari B.Khanbabaei Department of Physics University of Guilan Department of Physics Damghan University

In this paper, we have improved the fast ignition scheme in order to have more authority needed for highenergy-gain. Due to the more penetrability and energy deposition of the particle beams in fusion targets, we employ a laser-to-ion converter foil as a scheme for generating energetic ion beams to ignite the fusion fuel. We find the favorable intensity and wavelength of incident laser by evaluating the laser-proton conversion gain. By calculating the source-target distance, proton beam power and energy are estimated. Our analysis is generalized to the plasma degeneracy effects which can increase the fusion gain several orders of magnitude by decreasing the ion-electron collisions in the *** is found that the wavelength of 0.53 μm and the intensity of about 1020W/cm^2, by saving about 10% conversion coefficient, are the suitable measured values for converting a laser into protons. Besides, stopping power and fusion burn calculations have been done in degenerate and non-degenerate plasma mediums. The results indicate that in the presence of degeneracy, the rate of fusion enhances.

关键词： proton fast ignition degenerate plasma laser-to-proton converter foil stopping power