Focusing and spectral enhancement of a repetition-rated, laser-driven, divergent multi-MeV proton beam using permanent quadrupole magnets

A pair of conventional permanent magnet quadrupoles is used to focus a 2.4 MeV laser-driven proton beam at a 1 Hz repetition rate. The magnetic field strengths are 55 and 60 T/m for the first and second quadrupoles, respectively. The proton beam is focused to a spot with a size of less than ∼ 3 × 8...

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Veröffentlicht in:Applied physics letters 2009-02, Vol.94 (6), p.061107-061107-3
Hauptverfasser: Nishiuchi, M., Daito, I., Ikegami, M., Daido, H., Mori, M., Orimo, S., Ogura, K., Sagisaka, A., Yogo, A., Pirozhkov, A. S., Sugiyama, H., Kiriyama, H., Okada, H., Kanazawa, S., Kondo, S., Shimomura, T., Tanoue, M., Nakai, Y., Sasao, H., Wakai, D., Sakaki, H., Bolton, P., Choi, I. W., Sung, J. H., Lee, J., Oishi, Y., Fujii, T., Nemoto, K., Souda, H., Noda, A., Iseki, Y., Yoshiyuki, T.
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Sprache:eng
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Zusammenfassung:A pair of conventional permanent magnet quadrupoles is used to focus a 2.4 MeV laser-driven proton beam at a 1 Hz repetition rate. The magnetic field strengths are 55 and 60 T/m for the first and second quadrupoles, respectively. The proton beam is focused to a spot with a size of less than ∼ 3 × 8   mm 2 at a distance of 650 mm from the source. This result is in good agreement with the Monte Carlo particle trajectory simulation.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3078291