Enhanced hard X-ray emission from microdroplet preplasma

Anand, M. ; Kahaly, S. ; Ravindra Kumar, G. ; Krishnamurthy, M. ; Sandhu, A. S. ; Gibbon, P. (2006) Enhanced hard X-ray emission from microdroplet preplasma Applied Physics Letters, 88 (18). Article ID 181111. ISSN 0003-6951

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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.2200761...

Related URL: http://dx.doi.org/10.1063/1.2200761


We perform a comparative study of hard X-ray emission from femtosecond laser plasmas in 15 μm methanol microdroplets and Perspex target. The hard X-ray yield from droplet plasmas is ≃ 68 times more than that obtained from solid plasmas at 2 × 1015 W cm−2. A 10 ns prepulse at about 5% of the main pulse appears to be essential for hard X-ray generation from droplets. Hot electron temperature of 36 keV is measured from the droplets at 8 × 1014 W cm−2, whereas a three times higher intensity is needed to obtain similar hot electron temperatures from Perspex plasmas. Particle-in-cell simulations with very long scale-length density profiles support experimental observations.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Fluid Drops; Hard X-rays; X-ray Generation; Extreme Ultraviolet Radiation; Particle-in-cell Method
ID Code:102616
Deposited On:02 Feb 2018 04:27
Last Modified:02 Feb 2018 04:27

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