Focusing of millijoule picosecond K-alpha radiation from 100 TW laser-solid interaction

0345565 - FZÚ 2011 RIV US eng J - Článek v odborném periodiku
Lévy, A. - Dorchies, F. - Audebert, P. - Chalupský, Jaromír - Hájková, Věra - Juha, Libor - Kaempfer, T. - Sinn, H. - Uschmann, I. - Vyšín, Luděk - Gaudin, J.
Focusing of millijoule picosecond K-alpha radiation from 100 TW laser-solid interaction.
Applied Physics Letters. Roč. 96, č. 15 (2010), 151114/1-151114/3. ISSN 0003-6951. E-ISSN 1077-3118
Grant CEP: GA AV ČR KAN300100702; GA MŠMT(CZ) 7E08099; GA MŠMT LC510; GA MŠMT(CZ) LC528; GA MŠMT LA08024; GA AV ČR IAAX00100903; GA MŠMT(CZ) ME10046; GA AV ČR IAA400100701
Výzkumný záměr: CEZ:AV0Z10100523
Klíčová slova: foils * laser beam effects * titanium * x-ray production
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 3.820, rok: 2010

A calibrated x-ray spectrometer was used to characterize an intense 4.5 keV K-alpha source. Generated from the interaction of 30 J-320 fs laser pulses focused on 25 μm thick Ti foils, the conversion efficiency into Ti K-alpha line is estimated to (9 +/- 6)x10-5. Highly efficient collection, monochromatization and focusing were achieved using an ellipsoidally bent highly oriented pyrolytic graphite crystal. The measured 700 μm full width half maximum (FWHM) focal spot leads to a fluence of (3.0 +/- 2.1) mJ/cm2 hence paving the way to the study of intense x-ray pulse interaction with matter as demonstrated by a first simple experiment.
Trvalý link: http://hdl.handle.net/11104/0186807