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

0345565 - FZÚ 2011 RIV US eng J - Journal Article
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
R&D Projects: 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
Institutional research plan: CEZ:AV0Z10100523
Keywords : foils * laser beam effects * titanium * x-ray production
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 3.820, year: 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.
Permanent Link: http://hdl.handle.net/11104/0186807