Laser interaction with low-density carbon foam

S. Chaurasia, S. Tripathi, D. S. Munda, G. Mishra, C. G. Murali, N. K. Gupta, L. J. Dhareshwar, A. K. Rossall, G. J. Tallents, Rashmi Singh, D. K. Kohli, R. K. Khardekar

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Abstract

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 fil- ters 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 in- crease 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.

Original languageEnglish
Pages (from-to)1191-1196
Number of pages6
JournalPramana - Journal of Physics
Volume75
Issue number6
DOIs
Publication statusPublished - 1 Dec 2010
Externally publishedYes

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Chaurasia, S., Tripathi, S., Munda, D. S., Mishra, G., Murali, C. G., Gupta, N. K., ... Khardekar, R. K. (2010). Laser interaction with low-density carbon foam. Pramana - Journal of Physics, 75(6), 1191-1196. https://doi.org/10.1007/s12043-010-0205-6