Measurements of ion-electron energy-transfer cross section in high-energy-density plasmas
| Autor: | P. J. Adrian, R. Florido, P. E. Grabowski, R. Mancini, B. Bachmann, L. X. Benedict, M. Gatu Johnson, N. Kabadi, B. Lahmann, C. K. Li, R. D. Petrasso, H. G. Rinderknecht, S. P. Regan, F. H. Séguin, R. L. Singleton, H. Sio, G. D. Sutcliffe, H. D. Whitley, J. A. Frenje |
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| Rok vydání: | 2022 |
| Zdroj: | Physical Review E. 106 |
| ISSN: | 2470-0053 2470-0045 |
| Popis: | We report on measurements of the ion-electron energy-transfer cross section utilizing low-velocity ion stopping in high-energy-density plasmas at the OMEGA laser facility. These measurements utilize a technique that leverages the close relationship between low-velocity ion stopping and ion-electron equilibration. Shock-driven implosions of capsules filled with D^{3}He gas doped with a trace amount of argon are used to generate densities and temperatures in ranges from 1×10^{23} to 2×10^{24} cm^{-3} and from 1.4 to 2.5 keV, respectively. The energy loss of 1-MeV DD tritons and 3.7-MeV D^{3}He alphas that have velocities lower than the average velocity of the thermal electrons is measured. The energy loss of these ions is used to determine the ion-electron energy-transfer cross section, which is found to be in excellent agreement with quantum-mechanical calculations in the first Born approximation. This result provides an experimental constraint on ion-electron energy transfer in high-energy-density plasmas, which impacts the modeling of alpha heating in inertial confinement fusion implosions, magnetic-field advection in stellar atmospheres, and energy balance in supernova shocks. |
| Databáze: | OpenAIRE |
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