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Time-resolved studies of scintillation materials with VUV harmonic ultrashort pulses laser source

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5 Author(s)
P. Martin ; Centre Lasers Intenses et Applications, Bordeaux I Univ., Talence, France ; A. N. Belsky ; E. Constant ; E. Mevel
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A new VUV laser source and its possible applications in the investigation of scintillator materials are discussed. The femtosecond duration and high intensity of Ti-sapphire laser pulses lead to direct generation in a gas of high-order harmonics (HH) with spectrum extended up to VUV-X region. An HH radiation source with up to 1010 photons per harmonic and femtosecond pulse duration offers new possibilities for the study of energy relaxation processes in solids under VUV and X-ray excitations as compared to the synchrotron radiation and pulsed X-ray tube. We describe the design of a 20-fs and 20-mJ laser chain operating at a repetition rate of 1 kHz, as well as the design of the VUV beam line composed of the high-order harmonics generation chamber, VUV monochromator, and experimental chamber. We present the results on HH spectra studies and the first measurements of decay kinetics of scintillators (BaF2 and anthracene) excited by HH radiation

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IEEE Transactions on Nuclear Science  (Volume:48 ,  Issue: 4 )