An Investigation of Effective Parameters in Deuterium-Tritium Fuel Gains in Shock Ignition Method Driven by Laser Beams

Document Type : Original Article

Authors

1 Assistant Professor, Department of Physics, Technical and Vocational University (TVU), Tehran, Iran.

2 Assistant Professor, School of Physics, Damghan University, Damghan, Iran.

3 MSc, School of Physics, Damghan University, Damghan, Iran.

Abstract

Shock ignition (SI) is one of the methods considered in the concept of inertial confinement fusion (ICF). This two-step ICF process separates fuel assembly and ignition, relaxing the driver requirements and promising high gains. In SI scheme, a strong spherical shock wave converging at the end of the initial laser pulse ignites the pre-compressed fuel. In shock ignition, when the hot spot pressure is much higher than the surrounding cold fuel pressure, the fuel structure is considered non-isobaric. In this research, ignition conditions and fuel efficiency in shock ignition method were investigated. Then, the fuel efficiency correlations of total fuel energy, fuel gain and hot-spot radius in a non-isobaric model of fuel assembly were improved and compared with the numerical results of deuterium-tritium (DT) homogeneous fuel in SI scenario. Calculations showed that the hot spot formation conditions depend on the hot spot density and the surrounding cold fuel. Furthermore, using the improved energy efficiency equation, the role of physical parameters such as fuel mass and different ratios of hot spot pressure to the surrounding cold fuel pressure in energy efficiency were investigated.

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References

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Karafan Quarterly Scientific Journal
Volume 18, Special Issue 1 - Serial Number 54
Art and Architecture/ Basic Sciences
September 2021
Pages 205-215

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History

  • Receive Date: 29 December 2020
  • Revise Date: 15 February 2021
  • Accept Date: 06 March 2021

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