Point-like sources of X-rays that are pulsed (sub nanosecond), high energy (up to several MeV) and bright are very promising for industrial and security applications where imaging through large and dense objects is required. Highly penetrating X-rays can be produced by electrons that have been accelerated by a high intensity laser pulse incident onto a thin solid target. We have used a pulse length of ~10ps to accelerate electrons to create a bright x-ray source. The bremsstrahlung temperature was measured for a laser intensity from 8.5-12×1018 W/cm2. These x-rays have sequentially been used to image high density materials using image plate and a pixelated scintillator system.
D. R. Rusby, C. M. Brenner, C. Armstrong, L. A. Wilson, R. Clarke, A. Alejo, H. Ahmed, N. M. H. Butler, D. Haddock, A. Higginson, A. McClymont, S. R. Mirfayzi, C. Murphy, M. Notley, P. Oliver, R. Allott, C. Hernandez-Gomez, S. Kar, P. McKenna, and D. Neely, "Pulsed x-ray imaging of high-density objects using a ten picosecond high-intensity laser driver," Proc. SPIE 9992, Emerging Imaging and Sensing Technologies, 99920E (Presented at SPIE Security + Defence: September 28, 2016; Published: 25 October 2016); https://doi.org/10.1117/12.2241776.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon