Main > High Power Laser Science and Engineering >  Volume 7 >  Issue 2 >  Page 02000e24 > Article
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Accepted: Jan. 30, 2019

Posted: Apr. 30, 2019

Published Online: Apr. 30, 2019

The Author Email: C. D. Armstrong (chris.armstrong@stfc.ac.uk)

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C. D. Armstrong, C. M. Brenner, C. Jones, D. R. Rusby, Z. E. Davidson, Y. Zhang, J. Wragg, S. Richards, C. Spindloe, P. Oliveira, M. Notley, R. Clarke, S. R. Mirfayzi, S. Kar, Y. Li, T. Scott, P. McKenna, D. Neely. Bremsstrahlung emission from high power laser interactions with constrained targets for industrial radiography[J]. High Power Laser Science and Engineering, 2019, 7(2): 02000e24

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## Abstract

Laser–solid interactions are highly suited as a potential source of high energy X-rays for nondestructive imaging. A bright, energetic X-ray pulse can be driven from a small source, making it ideal for high resolution X-ray radiography. By limiting the lateral dimensions of the target we are able to confine the region over which X-rays are produced, enabling imaging with enhanced resolution and contrast. Using constrained targets we demonstrate experimentally a $(20\pm 3)~\unicode[STIX]{x03BC}\text{m}$ X-ray source, improving the image quality compared to unconstrained foil targets. Modelling demonstrates that a larger sheath field envelope around the perimeter of the constrained targets increases the proportion of electron current that recirculates through the target, driving a brighter source of X-rays.