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Proceedings Paper

Utilizing ablation of solids to characterize a focused soft x-ray laser beam
Author(s): J. Chalupský; L. Juha; J. Kuba; V. Hájková; J. Cihelka; P. Homer; M. Kozlová; T. Mocek; J. Polan; B. Rus; J. Krzywinsky; R. Sobierajski; H. Wabnitz; J. Feldhaus; K. Tiedtke
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Paper Abstract

An advanced time integrated method has been developed for soft X-ray pulsed laser beam characterization. A technique based on poly (methyl methacrylate) - PMMA laser induced ablation has been used for beam investigations of soft X-ray laser sources like FLASH (Free-electron LASer in Hamburg; formerly known as VUV FEL and/or TTF2 FEL) and plasma-based Ne-like Zn laser performed at PALS (Prague Asterix Laser System). For the interaction experiments reported here, the FLASH system provided ultra-short pulses (~10-fs) of 21.7-nm radiation. The PMMA ablation was also induced by plasma-based Ne-like Zn soft X-ray laser pumped by NIR beams at the PALS facility. This quasi-steady-state (QSS) soft X-ray laser provides 100-ps pulses of 21.2-nm radiation, i.e. at a wavelength very close to that of FLASH but with about 5,000 times longer pulses. In both cases, the PMMA samples were irradiated by a single shot with a focused beam under normal incidence conditions. Characteristics of ablated craters obtained with AFM (Atomic Force Microscope) and Nomarski microscopes were utilized for profile reconstruction and diameter determination of the focused laser beams ablating the PMMA surface.

Paper Details

Date Published: 18 May 2007
PDF: 9 pages
Proc. SPIE 6586, Damage to VUV, EUV, and X-ray Optics, 65860S (18 May 2007); doi: 10.1117/12.724385
Show Author Affiliations
J. Chalupský, Institute of Physics (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
L. Juha, Institute of Physics (Czech Republic)
J. Kuba, Czech Technical Univ. in Prague (Czech Republic)
V. Hájková, Institute of Physics (Czech Republic)
J. Cihelka, Institute of Physics (Czech Republic)
P. Homer, Institute of Physics (Czech Republic)
M. Kozlová, Institute of Physics (Czech Republic)
T. Mocek, Institute of Physics (Czech Republic)
J. Polan, Institute of Physics (Czech Republic)
B. Rus, Institute of Physics (Czech Republic)
J. Krzywinsky, Institute of Physics (Poland)
R. Sobierajski, Institute of Physics (Poland)
H. Wabnitz, Deutsches Elektronen-Synchrotron (Germany)
J. Feldhaus, Deutsches Elektronen-Synchrotron (Germany)
K. Tiedtke, Deutsches Elektronen-Synchrotron (Germany)

Published in SPIE Proceedings Vol. 6586:
Damage to VUV, EUV, and X-ray Optics
Libor Juha; Ryszard H. Sobierajski; Hubertus Wabnitz, Editor(s)

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