A dynamic shell implosion concept in direct-drive inertial confinement fusion utilizes a spherical pellet of liquid DT, which is first compressed by convergent shocks, then expands after bouncing these shocks from the center, decelerates and forms a shell with the help of following subsequent converged shocks, and finally, implodes resulting in conventional central hot-spot ignition [V. N. Goncharov et al., Phys. Rev. Lett. 125, 065001 (2020)]. Proof-of-principle experiments on the OMEGA laser were proposed to demonstrate, for the first time, the feasibility of dynamic formation of a dense shell in a spherically expanding cloud of plasma. This shell is formed by convergent shocks launched at the edge of the cloud, with the cloud itself formed as a result of compression and relaxation of a plastic-foam ball target. The results of experiments are expected to be reported and compared with 2-D and 3-D radiation-hydrodynamic simulations. These simulations predict good stability of the dynamic shells considered to low-mode asymmetries induced by laser-illumination nonuniformities, target offset, and stalk mount. *This material is based upon work supported by the Department of Energy National NuclearSecurity Administration under Award Number DE-NA0003856 and ARPA-E BETHE Grant No.DE-FOA-0002212. The experiment was conducted at the Omega Laser Facility at the Universityof Rochester’s Laboratory for Laser Energetics with the beam time through the NationalLaser Users’ Facility (NLUF) program.
Proof-of-principle Experiment on the dynamic Shell formation Concept on the OMEGA Laser / Igumenshchev, Igor; R Theobald, Wolfgang; J Bonino, Mark; M Campbell, Edward; J Collins, Timothy; Fess, Sarah; N Goncharov, Valeri; R Harding, David; R Shaffer, Nathaniel; T Trickey, William; Sampat, Siddharth; C Shah, Rahul; Shvydky, Alexander; Stoeckl, Christian; Waxer, Leon; Colaitis, Arnaud; Loitard, Romain; Atzeni, Stefano; Barbato, Francesco; Savino, Lorenzo; Alfonso, Noel; Haid, Alex. - (2022). (Intervento presentato al convegno 64th Annual Meeting of the APS Division of Plasma Physics tenutosi a Spokane Washington USA).
Proof-of-principle Experiment on the dynamic Shell formation Concept on the OMEGA Laser
Stefano Atzeni;Francesco Barbato;Lorenzo Savino;
2022
Abstract
A dynamic shell implosion concept in direct-drive inertial confinement fusion utilizes a spherical pellet of liquid DT, which is first compressed by convergent shocks, then expands after bouncing these shocks from the center, decelerates and forms a shell with the help of following subsequent converged shocks, and finally, implodes resulting in conventional central hot-spot ignition [V. N. Goncharov et al., Phys. Rev. Lett. 125, 065001 (2020)]. Proof-of-principle experiments on the OMEGA laser were proposed to demonstrate, for the first time, the feasibility of dynamic formation of a dense shell in a spherically expanding cloud of plasma. This shell is formed by convergent shocks launched at the edge of the cloud, with the cloud itself formed as a result of compression and relaxation of a plastic-foam ball target. The results of experiments are expected to be reported and compared with 2-D and 3-D radiation-hydrodynamic simulations. These simulations predict good stability of the dynamic shells considered to low-mode asymmetries induced by laser-illumination nonuniformities, target offset, and stalk mount. *This material is based upon work supported by the Department of Energy National NuclearSecurity Administration under Award Number DE-NA0003856 and ARPA-E BETHE Grant No.DE-FOA-0002212. The experiment was conducted at the Omega Laser Facility at the Universityof Rochester’s Laboratory for Laser Energetics with the beam time through the NationalLaser Users’ Facility (NLUF) program.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
