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Laser interaction with low-density carbon foam

Chaurasia, S., Tripathi, S., Munda, D. S., Mishra, G., Murali, C. G., Gupta, N. K., Dhareshwar, L. J., Rossall, A. K., Tallents, G. J., Singh, Rashmi, Kohli, D. K. and Khardekar, R. K. (2010) Laser interaction with low-density carbon foam. Pramana, 75 (6). pp. 1191-1196. ISSN 0304-4289

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Experiments were performed with a 15 J/500 ps Nd:glass laser (λ = 1064 nm) focussed to an intensity >1014 W/cm2. X-ray emissions from carbon foam and 5% Pt-doped carbon foam of density 150–300 mg/cc were compared with that of the solid carbon targets. The thickness of the carbon foam was 15 µm on a graphite substrate. X-ray emission was measured using semiconductor X-ray diodes covered with various filters having transmissions in different X-ray spectral ranges. It covered X-ray spectrum of 0.8–8.5 keV range. The X-ray emission in the soft X-ray region was observed to increase to about 1.8 times and 2.3 times in carbon foam and Pt-doped foam, respectively with respect to solid carbon. In hard X-rays, there was no measurable difference amongst the carbon foam, Pt-doped carbon foam and solid carbon. Scanning electron microscope (SEM) analysis demonstrates that foam targets smoothens the crater formed by the laser irradiation.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Computing and Engineering
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Depositing User: Andrew Rossall
Date Deposited: 13 Apr 2016 11:44
Last Modified: 13 Apr 2016 11:44


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