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A. Ya. Faenov,
T. A. Pikuz,
Y. Fukuda,
M. Kando,
H. Kotaki,
T. Homma,
K. Kawase,
T. Kameshima,
A. Pirozhkov,
A. Yogo, [......],
A. S. Boldarev,
V. A. Gasilov,
A. I. Magunov, S. Kar,
M. Borghesi,
P. Bolton,
H. Daido,
T. Tajima,
I. Kato,
S. V. Bulanov
[show abstract]
[hide abstract]
ABSTRACT: It has been shown that a femtosecond plasma of cluster targets is an almost isotropic source of fast ions and, hence, can
be used to obtain ionographic images with a wide field of view. The spatial resolution of the resulting ionographic images
is no worse than 600 nm, which corresponds to a uniquely high value of about 105 of the ratio of the field of view to the
resolution. The use of 100–300-keV ion fluxes ensures the sensitivity of the method to the sample thickness of no worse than
100 nm even for samples consisting of light chemical elements (C, H). The proposed method can be used to obtain images of
low-contrast biological objects, thin films, membranes, and other nanostructured objects.
JETP Letters 04/2012; 89(10):485-491. · 1.35 Impact Factor
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A.Ya. Faenov,
T.A. Pikuz,
S.A. Pikuz Jr,
Y. Fukuda,
M. Kando,
H. Kotaki,
T. Homma,
K. Kawase,
T. Kameshima,
A. Pirozhkov, [......],
C.A. Cecchetti,
M. Mori,
H. Sakaki,
Y. Hayashi,
P. Bolton,
T. Nakamura,
H. Daido,
T. Tajima,
Y. Kato,
S.V. Bulanov
[show abstract]
[hide abstract]
ABSTRACT: A novel type of submicron ion radiography designed to image low-contrast objects, including nanofoils, membranes and biological structures, is proposed. It is based on femtosecond–laser-driven-cluster- plasma source of multicharged ions and polymer dosimeter film CR-39. The intense isotropic ion flow was produced by femtosecond Ti:Sa laser pulses with intensity ∼ 4x1017 W/cm2 absorbed in the supersonic jet of the mixed He and CO2 gases. Two Focusing Spectrometers with Spatial Resolution (FSSR) were used to measure X-ray spectra of H-and He-like multicharged oxygen ions. The spectra testify that ions with energy more than 300 keV were radiated in different directions from the plasma source. High contrast ion radiography images were obtained for 2000 dpi metal mesh, 1 μm polypropylene and 100 nm Zr foils as well as for the different biological objects. Images were recorded on a 1 mm thick CR-39 detector, placed in contact with back surface of the imaged samples at the distances 140 -160 mm from the ion source. The spatial resolution of the image no worse than 600 nm was provided. A difference in object thickness of 100 nm was very well resolved for both Zr and polymer foils. The ion radiography images recorded at different angles from the source, demonstrated almost uniform spatial distribution of ion with total number of 108 per shot (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Contributions to Plasma Physics 10/2009; 49(7‐8):507 - 516. · 1.11 Impact Factor
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A Ya,
Faenov,
T A Pikuz,
Y Fukuda,
M Kando,
H Kotaki,
T Homma,
K Kawase,
T Kameshima,
A Pirozhkov, [......],
V A Gasilov,
A Magunov, S Kar,
M Borghesi,
P Bolton,
H Daido,
T Tajima,
Y Kato,
S V Bulanov,
M Prokhorov
[show abstract]
[hide abstract]
ABSTRACT: An intense isotropic source of multicharged carbon and oxygen ions with energy above 300 keV and particle number 10 8 per shot was obtained by femtosecond Ti:Sa laser irradiation of submicron clusters. The source was employed for high-contrast contact ionography images with 600 nm spatial resolution. A variation in object thickness of 100 nm was well resolved for both Zr and polymer foils.
Applied Physics Letters 09/2009; 91:101107. · 3.84 Impact Factor
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A. Ya. Faenov,
T. A. Pikuz,
Y. Fukuda,
M. Kando,
H. Kotaki,
T. Homma,
K. Kawase,
T. Kameshima,
A. Pirozhkov,
A. Yogo, [......],
A. S. Boldarev,
V. A. Gasilov,
A. Magunov, S. Kar,
M. Borghesi,
P. Bolton,
H. Daido,
T. Tajima,
Y. Kato,
S. V. Bulanov
[show abstract]
[hide abstract]
ABSTRACT: The intense isotropic source of multicharged ions, with energy above 300 keV, was produced by femtosecond Ti:Sa laser pulses irradiation (intensity of ∼ 4×1017 W/cm2) of the He and CO2 gases mixture expanded in supersonic jet. High contrast ionography images have been obtained for 2000 dpi metal mesh, 1 μm polypropylene and 100 nm Zr foils, as well as for different biological objects. Images were recorded on 1 mm thick CR‐39 ion detector placed in contact with back surface of the imaged samples, at the distances 140–160 mm from the plasma source. The obtained spatial resolution of the image was ∼600 nm. A 100 nm object thickness difference was resolved very well for both Zr and polymer foils. The multicharged ion energy for Carbon and Oxygen ions passing through the 1 μm polypropylene foil is estimated to give the energy of more than 300 keV. An almost equal number of ions were measured with total number of about 108 per shot at a different direction from plasma source. Easy production of different sub‐MeV ions in wide space angle, recognizes femtosecond‐laser‐driven‐cluster‐based plasma as a well‐suited bright source for novel type of submicron ionography to image different media, including nanofoils, membranes, and other low‐contrast objects.
AIP Conference Proceedings. 07/2009; 1153(1):343-355.
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A.Ya. Faenov,
T.A. Pikuz,
Y. Fukuda,
M. Kando,
H.Kotaki,
T. Homma,
K. Kawase,
T. Kameshima,
A. Pirozhkov,
A. Yogo, [......],
A.S. Boldarev,
V.A. Gasilov,
A. Magunov, S. Kar,
M. Borghesi,
P. Bolton,
H. Daido,
T. Tajima,
Y. Kato,
S.V. Bulanov
[show abstract]
[hide abstract]
ABSTRACT: It has been shown that a femtosecond plasma of cluster targets is an almost isotropic source of fast ions and, hence, can be used to obtain ionographic images with a wide field of view. The spatial resolution of the resulting ionographic images is no worse than 600 nm, which corresponds to a uniquely high value of about 10^5 of the ratio of the field of view to the resolution. The use of 100-300 keV ion fluxes ensures the sensitivity of the method to the sample thickness of no worse than 100 nm even for samples consisting of light chemical elements (C, H). The proposed method can be used to obtain images of low-contrast biological objects, thin films, membranes, and other nanostructured objects.
JETP Letters 04/2009; 89:485. · 1.35 Impact Factor
