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Micro-radiography with laser plasma X-ray source operating in air atmosphere

Published online by Cambridge University Press:  15 June 2010

S.A. Pikuz Jr. ,
O.V. Chefonov ,
S.V. Gasilov ,
P.S. Komarov ,
A.V. Ovchinnikov ,
I.Yu. Skobelev ,
S.Yu. Ashitkov ,
M.V. Agranat ,
A. Zigler  and
A.Ya. Faenov
S.A. Pikuz Jr.
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia Moscow Institute of Physics and Technology, Dolgoprudny, Russia
O.V. Chefonov
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
S.V. Gasilov
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
P.S. Komarov
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
A.V. Ovchinnikov
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
I.Yu. Skobelev
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
S.Yu. Ashitkov
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
M.V. Agranat
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia
A. Zigler
Affiliation:
Racah Institute of Physics, Hebrew University, Jerusalem, Israel
A.Ya. Faenov*
Affiliation:
Joint Institute for High Temperatures RAS, Moscow, Russia Kansai Photon Science Institute JAEA, Kizugawa-city, Kyoto, Japan
*
Address correspondence and reprint requests to: Anatoly Ya. Faenov, Joint Institute for High Temperatures of Russian Academy of Sciences, Izhorskaya str. 13-2, 125412 Moscow, Russia. E-mail: [email protected]
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Abstract

K-shell emission from copper target was observed by focusing femtosecond laser pulses very close to the target surface-air interface. It was shown that mechanism of X-ray emission is connected with generation of fast electrons in the air plasma area. Experiments demonstrated that moderate intensity of laser radiation (IL < 1015 W/cm2) was enough to produce considerable flux of X-ray photons of at least 10 keV energy. The parameters of generated X-ray emission were studied. It was found that after propagation through 40 cm thick air layer X-ray spectra consisted of pronounced Kα and Kβ characteristic lines and relatively small Bremsstrahlung continuum. Since transversal source size has an order of a few tens of micrometers, such a source can be used for absorption imaging of micro-objects in standard laboratory conditions. That can be particularly important for diagnostic of medical and biological samples in vivo.

Keywords

Laser-produced plasmaMicro-radiography
Type
Research Article
Information
Laser and Particle Beams , Volume 28 , Issue 3 , September 2010 , pp. 393 - 397
Copyright
Copyright © Cambridge University Press 2010

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