Ten hertz bead pellet injection and laser engagement

Author:

Mori Y.ORCID,Ishii K.,Hanayama R.,Okihara S.,Kitagawa Y.,Nishimura Y.,Komeda O.,Hioki T.,Motohiro T.,Sunahara A.ORCID,Sentoku Y.,Iwamoto A.,Sakagami H.,Miura E.,Johzaki T.ORCID

Abstract

Abstract A laser inertial fusion energy (IFE) reactor requires repetitive injection of fuel pellets and laser engagement to fuse fusion fuel beyond a few Hz. We demonstrate 10 Hz free-fall bead pellet injection and laser engagement with γ-ray generation. Deuterated polystyrene beads with a diameter of 1 mm were engaged by counter illuminating ultra-intense laser pulses with an intensity of 5 × 1017 W cm−2 at 10 Hz. The spatial distribution of free-fall beads was 0.86 mm in the horizontal direction and 0.18 mm in the vertical direction. The system operated for more than 5 min and 3500 beads were supplied with achieved frequencies of 2.1 Hz for illumination on the beads and 0.7 Hz for γ-ray generation; these frequencies were three times greater than with the previous 1 Hz injection system. The duration of operation was limited by the pellet supply. This injection and engagement system could be used for laser IFE research platforms.

Publisher

IOP Publishing

Subject

Condensed Matter Physics,Nuclear and High Energy Physics

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