Development of a compact laser-produced plasma soft X-ray source for radiobiology experiments

0454692 - FZÚ 2016 RIV NL eng J - Journal Article
Adjei, D. - Ayele, M. G. - Wachulak, P. - Bartnik, A. - Wegrzynski, L. - Fiedorowicz, H. - Vyšín, Luděk - Wiechec, A. - Lekki, J. - Kwiatek, W. M. - Pina, L. - Davídková, Marie - Juha, Libor
Development of a compact laser-produced plasma soft X-ray source for radiobiology experiments.
Nuclear Instruments & Methods in Physics Research Section B. Roč. 364, Dec (2015), s. 27-32. ISSN 0168-583X. E-ISSN 1872-9584
R&D Projects: GA ČR(CZ) GBP108/12/G108; GA ČR GA13-28721S
EU Projects: European Commission(XE) 284464 - LASERLAB-EUROPE
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : laser-produced plasma * soft X-rays * radiobiology * gas puff target * water window
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.389, year: 2015

A desk-top laser-produced plasma (LPP) source of soft X-rays (SXR) has been developed for radiobiology research. The source is based on a double-stream gas puff target, irradiated with the focused beam of a commercial Nd:YAG laser. The source has been optimized to get a maximum photon emission from LPP in the X-ray “water window” spectral wavelength range from 2.3 nm (i.e., an absorption edge of oxygen) to 4.4 nm (i.e., an absorption edge of carbon) (280–540 eV in photon energy units) by using argon gas-puff target and spectral filtering by free-standing thin foils. In this paper, the source design, radiation output characterization measurements and initial irradiation experiments are described. The source can be useful in addressing observations related to biomolecular, cellular and organisms’ sensitivity to pulsed radiation in the “water window”, where carbon atoms absorb X-rays more strongly than the oxygen, mostly present in water.
Permanent Link: http://hdl.handle.net/11104/0255338