1. Demonstration of repetitive energetic proton generation by ultra-intense laser interaction with a tape target
- Author
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Dover, NicholasPeter, Nishiuchi, Mamiko, Sakaki, Hironao, Kondo, Kotaro, A. Alkhimova, M., Ya. Faenov, A., Hata, M., Iwata, N., Kiriyama, Hiromitsu, Kevin Koga, James, Miyahara, Takumi, A. Pikuz, T., Pirozhkov, Alexander, Sagisaka, Akito, Sentoku, Y., Watanabe, Y., Kando, Masaki, Kondo, Kiminori, Lowe, HazelFrances, J. Ditter, E., C. Ettlinger, O., S. Hicks, G., Najmudin, Z., Schramm, U., Ziegler, T., and Zeil, K.
- Abstract
High power laser systems are an attractive driver for compact energetic ion sources. We demonstrate repetitive acceleration at 0.1 Hz of proton beams up to 40 MeV from a reeled tape target irradiated by ultra-high intensities up to 5 × 1021 Wcm−2 and laser energies ≈ 15 J using the J-KAREN-P laser system. We investigate the stability of the source and its behaviour with laser spot focal size. We compare the scaling of proton energy with laser energy with a recently developed analytical model, and also demonstrate that it is possible to reach energies up to 50 MeV on a single shot with a lower laser energy ≈ 10 J by using a thinner target, motivating development of high repetition targetry suitable for thinner targets.
- Published
- 2020