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

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

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Experiments were performed with a 15 J/500 ps Nd:glass laser (lambda = 1064 nm) focussed to an intensity >10(14) W/cm(2). 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 pm 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.

Original language	English
Pages (from-to)	1191-1196
Number of pages	6
Journal	Pramana-Journal of physics
Volume	75
Issue number	6
Publication status	Published - Dec 2010

Keywords

Low-density foam
X-ray emission
volume absorption
TARGET DESIGN
FUSION

Cite this

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title = "Laser interaction with low-density carbon foam",

abstract = "Experiments were performed with a 15 J/500 ps Nd:glass laser (lambda = 1064 nm) focussed to an intensity >10(14) W/cm(2). 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 pm 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.",

keywords = "Low-density foam, X-ray emission, volume absorption, TARGET DESIGN, FUSION",

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

year = "2010",

month = dec,

language = "English",

volume = "75",

pages = "1191--1196",

journal = "Pramana-Journal of physics",

issn = "0304-4289",

publisher = "Springer India",

number = "6",

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TY - JOUR

T1 - Laser interaction with low-density carbon foam

AU - Chaurasia, S.

AU - Tripathi, S.

AU - Munda, D. S.

AU - Mishra, G.

AU - Murali, C. G.

AU - Gupta, N. K.

AU - Dhareshwar, L. J.

AU - Rossall, A. K.

AU - Tallents, G. J.

AU - Singh, Rashmi

AU - Kohli, D. K.

AU - Khardekar, R. K.

PY - 2010/12

Y1 - 2010/12

N2 - Experiments were performed with a 15 J/500 ps Nd:glass laser (lambda = 1064 nm) focussed to an intensity >10(14) W/cm(2). 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 pm 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.

AB - Experiments were performed with a 15 J/500 ps Nd:glass laser (lambda = 1064 nm) focussed to an intensity >10(14) W/cm(2). 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 pm 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.

KW - Low-density foam

KW - X-ray emission

KW - volume absorption

KW - TARGET DESIGN

KW - FUSION

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M3 - Article

SN - 0304-4289

VL - 75

SP - 1191

EP - 1196

JO - Pramana-Journal of physics

JF - Pramana-Journal of physics

IS - 6

ER -

Laser interaction with low-density carbon foam

Abstract

Keywords

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