Optimization of soft x-ray line emission from laser-produced carbon plasma with laser intensity |
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| Authors: | A Chowdhury R A Joshi G P Gupta P A Naik P D Gupta |
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| Institution: | (1) Laser Plasma Division, Centre for Advanced Technology, 452 013 Indore, India;(2) Laser and Plasma Technology Division, Bhabha Atomic Research Centre, 400 085 Mumbai, India |
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| Abstract: | Absolute measurement for He-α resonance (1s2 1S0?1s2p1 P 1, at 40.2 Å) line emission from a laser-produced carbon plasma has been studied as a function of laser intensity. The optimum laser intensity is found to be ≈1.3×1012 W/cm2 for the maximum emission of 3.2 × 1013 photons sr?1 pulse?1. Since this line lies in the water window spectral region, it has potential application in x-ray microscopic imaging of biological sample in wet condition. Theoretical calculation using corona model for the emission of this line is also carried out with appropriate ionization and radiative recombination rate coefficients |
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| Keywords: | XUV spectroscopy laser-produced plasmas flat-field spectrograph Nd : phosphate glass laser |
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