Fill-tube-induced mass perturbations on x-ray-driven, ignition-scale, inertial-confinement-fusion capsule shells and the implications for ignition experiments |
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Authors: | Bennett G R Herrmann M C Edwards M J Spears B K Back C A Breden E W Christenson P J Cuneo M E Dannenburg K L Frederick C Keller K L Mulville T D Nikroo A Peterson K Porter J L Russell C O Sinars D B Smith I C Stamm R M Vesey R A |
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Affiliation: | Sandia National Laboratories, Albuquerque, New Mexico 87185-1193, USA. |
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Abstract: | On the first inertial-confinement-fusion ignition facility, the target capsule will be DT filled through a long, narrow tube inserted into the shell. microg-scale shell perturbations Delta m' arising from multiple, 10-50 microm-diameter, hollow SiO2 tubes on x-ray-driven, ignition-scale, 1-mg capsules have been measured on a subignition device. Simulations compare well with observation, whence it is corroborated that Delta m' arises from early x-ray shadowing by the tube rather than tube mass coupling to the shell, and inferred that 10-20 microm tubes will negligibly affect fusion yield on a full-ignition facility. |
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