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 |
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Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Artikel |
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. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.3078291 |