7th International Conference on Matter and Radiation at Extremes (ICMRE2024)

The ion-electron temperature conditions of implosion core in inertial confinement fusion are crucial for a controlled burn of fuel. It is commonly assumed that the ions and electrons in the hot spot are in thermal equilibrium in the design of implosion experiments. However, the implosion core can be driven out of thermal equilibrium by strong shock and α-particle energy deposition [1-4]. It has also been found that the obvious ion-electron non-equilibrium exists and can be observed in high-foot implosion experiments at the National Ignition Facility [5]. A measurement of the core temperatures is then of great importance for providing a better understanding of the implosion mechanisms. In the present work, we present the measurements of the ion-electron temperature conditions in capsule implosions at 100kJ laser facility. The Doppler-broadened neutron spectra was used to provide the ion temperature and a trace element X-ray spectroscopic method was adopted to obtain the evolution of the electron temperature in the implosion core. The conjunction measurements of the thermal temperatures allow one to infer election-ion collision and heat conduction process in indirect driven implosion cores.
 

1. R. C. Shah et al., Phys. Rev. E, 106, L013201 (2022)
2. A. S. Moore et al., Review. Sci. Instrum., 93, 113536 (2022)
3. B. M. Haines, Nat. Commun., 11, 544 (2020)
4. C. Ellison, Phys. Plasmas, 25, 072710 (2018)
5. Z. Fan et al., Matter Radiat. Extremes, 2, 3 (2017)

indirect driven implosion,ion-electron temperature,non-equilibrium