Design options for polar-direct-drive targets from alpha heating to ignition

9th International Conference on Inertial Fusion Sciences and Applications

Collins, T.J.B.^1,2 ; Marozas, J.A.^2 ; Skupsky, S.^2 ; Cao, D.^2 ; McKenty, P.W.^2 ; Delettrez, J.A.^2 ; Moses, G.^1

University of Wisconsin, Madison

WI

53706-1140, United States^1

Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester

NY

14623-1299, United States^2

关键词: Design option;    Direct-drive ignition;    Heat transport;    Multiwavelength;    National ignition facility;    Physical effects;    Polar direct drives;    Relevant target;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012012/pdf
DOI  :  10.1088/1742-6596/717/1/012012

来源: IOP

【 摘 要 】

Polar direct drive (PDD) makes it possible to perform direct-drive-ignition experiments at the National Ignition Facility while the facility is configured for x-ray drive. We present the first PDD ignition-relevant target designs to include the physical effects of crossbeam energy transfer (CBET) and nonlocal heat transport, both of which substantially affect the target drive. In the PDD configuration, a multiwavelength detuning strategy was found to be effective in mitigating the loss of coupling caused by CBET, allowing for implosion speeds comparable to those of previous designs. Two designs are described: a high-adiabat alpha-burning design and a lower-adiabat ignition design.