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Demonstration of up-conversion fluorescence from Ar clusters in intense free-electron-laser fields

強い自由電子レーザー場中のアルゴン・クラスターからの短波長変換の証明

岩山 洋士*; 永園 充*; Harries, J.; 繁政 英治*

Iwayama, Hiroshi*; Nagasono, Mitsuru*; Harries, J.; Shigemasa, Eiji*

Extreme ultraviolet (EUV) fluorescence emitted from Ar clusters irradiated by intense EUV free electron laser (FEL) pulses has been investigated. The EUV fluorescence spectra display rich structure at wavelengths shorter than the incident FEL wavelength of 51 nm. The results suggest that multiply-charged ions are produced following the ion-electron recombination processes which occur in the nanoplasma created by multi-photon excitation during the intense EUV-FEL pulses.

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パーセンタイル:63.55

分野:Optics

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