Measuring the electron density gradients of dense plasmas by deflectometry using short-wavelength probe

0355149 - FZÚ 2011 RIV US eng J - Článek v odborném periodiku
Nejdl, J. - Kozlová, Michaela - Mocek, Tomáš - Rus, Bedřich
Measuring the electron density gradients of dense plasmas by deflectometry using short-wavelength probe.
Physics of Plasmas. Roč. 17, č. 12 (2010), 122705/1-122705/6. ISSN 1070-664X. E-ISSN 1089-7674
Grant CEP: GA MŠMT(CZ) 7E08099; GA ČR GA202/08/1734; GA MŠMT(CZ) 7E09092
Grant ostatní: AVČR(CZ) M100100911
Výzkumný záměr: CEZ:AV0Z10100523
Klíčová slova: plasma density * plasma diagnostics * plasma electromagnetic wave propagation * plasma production by laser
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 2.320, rok: 2010
http://pop.aip.org/resource/1/phpaen/v17/i12/p122705_s1?isAuthorized=no

A new and simple experimental technique for the measurement of electron density gradients in dense laser-produced plasmas using an electromagnetic wave probe is presented. The main advantage of this method is the low requirements on coherence of the probing beam. The method is based on measuring the deformation of the Talbot pattern of a two-dimensional grating that stems from the distortion of the probe beam wave-front caused by the gradients of the index of refraction. The compromise between spatial resolution and sensitivity for the given wavelength of the probe beam is set by the experimental design. The proposed technique was experimentally verified on plasmas that were created by either a point focus or a line focus of a laser interacting with various solid targets. In the experiments reported here, all plasmas were probed by a Ne-like Zn x-ray laser beam at 21.2 nm, but the technique is applicable for any wavelength of the probe.
Trvalý link: http://hdl.handle.net/11104/0193984