A unique approach for permeation filling of nonpermeable inertial confinement fusion target capsules with deuterium— tritium (DT) is presented. This process uses a permeable capsule coupled into the final target capsule with a 0.03-mm-diameter fill tube. Leak free permeation filling of glow-discharge polymerization (GDP) targets using this method have been successfully demonstrated, as well as ice layering of the target, yielding an inner ice surface roughness of 1-Âµm rms (root mean square). Finally, the measured DT ice-thickness profile for this experiment was used to validate a thermal model’s prediction of the same thickness profile.
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Rice, B., Ulreich, J., Fella, C., Crippen, J., Fitzsimmons, P., & Nikroo, A. (2017). Permeation fill-tube design for inertial confinement fusion target capsules. High Power Laser Science and Engineering, 5, E6. doi:10.1017/hpl.2017.5
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