Demonstrating ignition hydrodynamic equivalence in direct-drive cryogenic implosions on OMEGA

9th International Conference on Inertial Fusion Sciences and Applications

Goncharov, V.N.^1,2 ; Regan, S.P.^1 ; Sangster, T.C.^1 ; Betti, R.^1,2,3 ; Boehly, T.R.^1 ; Campbell, E.M.^1 ; Delettrez, J.A.^1 ; Edgell, D.H.^1 ; Epstein, R.^1 ; Forrest, C.J.^1 ; Froula, D.H.^1,3 ; Glebov, V Yu^1 ; Harding, D.R.^1 ; Hu, S.X.^1 ; Igumenshchev, I.V.^1 ; Marshall, F.J.^1 ; McCrory, R.L.^1,2,3 ; Michel, D.T.^1 ; Myatt, J.F.^1,2 ; Radha, P.B.^1 ; Seka, W.^1 ; Shvydky, A.^1 ; Stoeckl, C.^1 ; Theobald, W.^1,2 ; Yaakobi, B.^1 ; Gatu-Johnson, M.^4

Laboratory for Laser Energetics, University of Rochester, Rochester

NY

14623, United States^1

Department of Mechanical Engineering, University of Rochester, Rochester

NY

14623, United States^2

Department of Physics and Astronomy, University of Rochester, Rochester

NY

14623, United States^3

Massachussets Institute of Technology, Plasma Science and Fusion Center, Cambridge

MA

02139, United States^4

关键词: Cryogenic targets;    Direct-drive cryogenic implosions;    Indirect-drive;    Long wavelength;    National ignition facility;    OMEGA laser systems;    Power imbalance;    Stagnation pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012008/pdf
DOI  :  10.1088/1742-6596/717/1/012008

来源: IOP

【 摘 要 】

Achieving ignition in a direct-drive cryogenic implosion at the National Ignition Facility (NIF) requires reaching central stagnation pressures in excess of 100 Gbar, which is a factor of 3 to 4 less than what is required for indirect-drive designs. The OMEGA Laser System is used to study the physics of cryogenic implosions that are hydrodynamically equivalent to the spherical ignition designs of the NIF. Current cryogenic implosions on OMEGA have reached 56 Gbar, and implosions with shell convergence CR 3.5 proceed close to 1-D predictions. Demonstrating hydrodynamic equivalence on OMEGA will require reducing coupling losses caused by cross-beam energy transfer (CBET), minimizing long- wavelength nonuniformity seeded by power imbalance and target offset, and removing target debris occumulated during cryogenic target production.