Hard x-ray generation by low energy, tightly focused laser pulses

Hard x-ray generation by low energy, tightly focused laser pulses

The interaction of λ 2 laser pulses with plasma is studied to scale the high-field physics from high power laser systems to low-energy, high-repetition-rate lasers. For this purpose, 20 mJ , 40 fs Ti:sapphire laser pulses were focused in a spot of 2.2 × 2.3 μ m 2 with a maximum intensity of I ∼ 10 1...

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Veröffentlicht in:Applied physics letters 2008-06, Vol.92 (25), p.251502-251502-3
Hauptverfasser: Takano, K., Nemoto, K., Nayuki, T., Oishi, Y., Fujii, T., Zhidkov, A., Hotta, E., Todoriki, M., Hasegawa, S.
Format: Artikel
Sprache:eng
Schlagworte:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COPPER
HARD X RADIATION
KEV RANGE 100-1000
LASERS
PLASMA
PULSES
SAPPHIRE
TAIL ELECTRONS
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Beschreibung
Zusammenfassung:The interaction of λ 2 laser pulses with plasma is studied to scale the high-field physics from high power laser systems to low-energy, high-repetition-rate lasers. For this purpose, 20 mJ , 40 fs Ti:sapphire laser pulses were focused in a spot of 2.2 × 2.3 μ m 2 with a maximum intensity of I ∼ 10 19 W ∕ cm 2 . Efficient generations of energetic electrons ( ∼ 1 MeV ) and hard x-rays with energies of over 100 keV were obtained by irradiating the low-energy, tightly focused laser pulses on a massive Cu target.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2945283