Simultaneous generation of quasi-monoenergetic electron and betatron X-rays from nitrogen gas via ionization injection

Upon the interaction of 60 TW Ti: sapphire laser pulses with 4 mm long supersonic nitrogen gas jet, a directional x-ray emission was generated along with the generation of stable quasi-monoenergetic electron beams having a peak energy of 130 MeV and a relative energy spread of ∼ 20%. The betatron x-...

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Veröffentlicht in:Applied physics letters 2014-11, Vol.105 (20)
Hauptverfasser: Huang, K., Li, D. Z., Yan, W. C., Li, M. H., Tao, M. Z., Chen, Z. Y., Ge, X. L., Liu, F., Ma, Y., Zhao, J. R., Hafz, N. M., Zhang, J., Chen, L. M.
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Sprache:eng
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Zusammenfassung:Upon the interaction of 60 TW Ti: sapphire laser pulses with 4 mm long supersonic nitrogen gas jet, a directional x-ray emission was generated along with the generation of stable quasi-monoenergetic electron beams having a peak energy of 130 MeV and a relative energy spread of ∼ 20%. The betatron x-ray emission had a small divergence of 7.5 mrad and a critical energy of 4 keV. The laser wakefield acceleration process was stimulated in a background plasma density of merely 5.4 × 1017 cm−3 utilizing ionization injection. The non-self-focusing and stable propagation of the laser pulse in the pure nitrogen gaseous plasma should be responsible for the simultaneous generation of the high-quality X-ray and electron beams. Those ultra-short and naturally-synchronized beams could be applicable to ultrafast pump-probe experiments.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4902127