Temperature Equilibration Rate of Quasi-Monoenergetic Deuteron Beam in a Fusion Plasmas

TL;DR

This paper calculates the temperature equilibration rate of a quasi-monoenergetic deuteron beam in a fusion plasma, highlighting the impact of background temperature and collective effects on energy transfer.

Contribution

It introduces a kinetic theory approach combining Boltzmann and Lenard-Balescu equations to analyze energy exchange in fusion plasmas with a monoenergetic ion beam.

Findings

Higher background temperatures increase ion interaction effects on equilibration rate.

Energy exchange is more significant at $T_b=100 keV$ due to collective effects.

The study provides insights into energy deposition in fast ignition fusion scenarios.

Abstract

Thermal equilibrium rate can play an important role in the energy deposition of beam to the fuel in fast ignition due to high temperature difference between projectile ions and background plasma ions. In this study the temperature equilibration rate of a quasi-monoenergetic deuteron beam with an equimolar Deuterium-Tritium fusion plasma with a Maxwellian energy distribution is calculated by kinetic theory equations. In this theory, binary collisions is described by the Boltzman equation and collective effects is described by the Lenard-Balescu equation. The obtained results show that at higher background temperatures, $T_{b}=100 keV$, the ions interactions effect in the temperature equilibration rate increases because the deuteron beam exchanges most of its energy with ions plasma