Pramana | |
Laser interaction with low-density carbon foam | |
L J Dhareshwar2  A K Rossall3  G Mishra2  N K Gupta2  C G Murali2  D K Kohli1  G J Tallents3  D S Munda2  R K Khardekar1  S Tripathi2  Rashmi Singh1  S Chaurasia12  | |
[1] Target Lab, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India$$;Laser & Neutron Physics Section, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Department of Physics, University of York, York, Y0105 DD, UK$$ | |
关键词: Low-density foam; X-ray emission; volume absorption.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Experiments were performed with a 15 J/500 ps Nd:glass laser (𜆠= 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 ðœ‡m 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.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040498188ZK.pdf | 771KB | download |