Staff Members - Benha University
Joint Experiments on X-ray / Particle Emission from Plasmas Produced by Laser Irradiating Nano Structured Targets
American Institute of Physics • 2008
Publication Information
Authors
H. Hegazy(1)* , S. H. Allam(2), S. Chaurasia(3), L. Dhareshwar(3),Th. M. El-Sherbini(2), H.-J. Kunze(4), G. Mank(5), D. H. McDaniel(6),M. Rosinski(7), L. Ryc(7), B. Stewart(8), J. Wolowski(7),H. Abd El-Ghany(9), G. Abd El-Latif(2), F. M. Abd El-Rahi
Keywords
Laser produced plasma; laser ablation; nano stracture
Journal
American Institute of Physics
Publisher
AIP publishers
Volume
996
Issue
1
Pages
243-350
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
The 1st Joint (Host Laboratory) Experiment on laser plasma involving more than
twenty scientists from eight countries has been carried out at the Laser and New Materials
Laboratory, Faculty of Science, Cairo University, Egypt. It was co-ordinated by the International
Atomic Energy Agency (IAEA) and supported through the IAEA and the ICTP (International
Centre for Theoretical Physics, Trieste). The main experimental programme was aimed at
characterising the possible enhancement of x-ray and particle emission from plasmas produced
by laser incidence on nano-structured targets. Laser beams at 1.064 m of 250 mJ and 532 nm
of 165 mJ focused at the target surface using a nanosecond laser type Quantel were used in the
present study. In the present experiments nano-copper structures evaporated onto copper bulk
disks and nano-gold structures evaporated onto gold ones were used. The thickness of the nanomaterials
on their bulk material was 1 m. An ion collector and x-ray semiconductor diode were
used to study the ion and x-ray emission, respectively. Both were positioned at the same port at
90o with respect to the target surface and at 90 cm from the surface in the case of the ion
collector and 55 cm in the case of the x-ray detector. These experiments were performed at
vacuum pressures of (5 - 8) x 10-6 mbar. Comparison of both studies in the case of nano
structured targets and bulk targets were performed at different laser fluencies (1x 109 – 1x1012
W/cm2) on the target. A 20% increase of the X-ray emission for nano gold with respect to bulk
gold was observed, however, the x-ray emission in the of nano copper and copper was the same.
twenty scientists from eight countries has been carried out at the Laser and New Materials
Laboratory, Faculty of Science, Cairo University, Egypt. It was co-ordinated by the International
Atomic Energy Agency (IAEA) and supported through the IAEA and the ICTP (International
Centre for Theoretical Physics, Trieste). The main experimental programme was aimed at
characterising the possible enhancement of x-ray and particle emission from plasmas produced
by laser incidence on nano-structured targets. Laser beams at 1.064 m of 250 mJ and 532 nm
of 165 mJ focused at the target surface using a nanosecond laser type Quantel were used in the
present study. In the present experiments nano-copper structures evaporated onto copper bulk
disks and nano-gold structures evaporated onto gold ones were used. The thickness of the nanomaterials
on their bulk material was 1 m. An ion collector and x-ray semiconductor diode were
used to study the ion and x-ray emission, respectively. Both were positioned at the same port at
90o with respect to the target surface and at 90 cm from the surface in the case of the ion
collector and 55 cm in the case of the x-ray detector. These experiments were performed at
vacuum pressures of (5 - 8) x 10-6 mbar. Comparison of both studies in the case of nano
structured targets and bulk targets were performed at different laser fluencies (1x 109 – 1x1012
W/cm2) on the target. A 20% increase of the X-ray emission for nano gold with respect to bulk
gold was observed, however, the x-ray emission in the of nano copper and copper was the same.