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<p>Fast ignition using antimatter drivers in inertial confinement fusion represents a promising route for achieving high-efficiency ignition and fusion gain. This work investigates the prospects of using a MeV-level antiproton beam to ignite pre-compressed uranium-238-doped deuterium-tritium fuel. Based on comprehensive simulations of energy deposition, annihilation dynamics, and plasma characteristics, we study the ignition conditions in quantum-degenerate plasma states. Our findings show that compressing deuterium-tritium fuel to a degenerate state lowers the number of antiprotons required for ignition (approximately <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(3 \times 10^{14}\)</EquationSource> </InlineEquation>) by more than an order of magnitude compared to classical plasma, while maintaining hotspot temperatures above the ignition threshold (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\sim 4 \,\text {keV}\)</EquationSource> </InlineEquation>). This improvement stems from the unique thermophysical properties of degenerate matter, which include suppressed thermal conduction, reduced bremsstrahlung losses, and higher target density, enabling more localized and effective energy deposition. The inclusion of uranium-238 provides additional heating through fission reactions induced by antiproton annihilation. This concept offers a promising path toward efficient and practical ignition in inertial confinement fusion, with potential applications in next-generation fusion power plants.</p>

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Theoretical Investigation of Antiproton-Induced Fast Ignition in Degenerate Fusion Fuel

  • 期刊论文

  • 发表日期：

    2025年12月24日

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  • Mohammad Sadra Asgari,
  • Babak Khanbabaei

摘要

Fast ignition using antimatter drivers in inertial confinement fusion represents a promising route for achieving high-efficiency ignition and fusion gain. This work investigates the prospects of using a MeV-level antiproton beam to ignite pre-compressed uranium-238-doped deuterium-tritium fuel. Based on comprehensive simulations of energy deposition, annihilation dynamics, and plasma characteristics, we study the ignition conditions in quantum-degenerate plasma states. Our findings show that compressing deuterium-tritium fuel to a degenerate state lowers the number of antiprotons required for ignition (approximately \(3 \times 10^{14}\) ) by more than an order of magnitude compared to classical plasma, while maintaining hotspot temperatures above the ignition threshold ( \(\sim 4 \,\text {keV}\) ). This improvement stems from the unique thermophysical properties of degenerate matter, which include suppressed thermal conduction, reduced bremsstrahlung losses, and higher target density, enabling more localized and effective energy deposition. The inclusion of uranium-238 provides additional heating through fission reactions induced by antiproton annihilation. This concept offers a promising path toward efficient and practical ignition in inertial confinement fusion, with potential applications in next-generation fusion power plants.