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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator

Abu-Azoum, Salima Saleh and Wiggins, Mark and Ersfeld, B. and Hart, K. and Vieux, G. and Yang, X. and Welsh, G. H. and Issac, R. C. and Reijnders, M. P. and Jones, D. R. and Jaroszynski, Dino A. (2012) Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator. Applied Physics Letters, 100. ISSN 0003-6951

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Abstract

Gas-filled capillary discharge waveguides are commonly used as media for plasma wakefield accelerators. We show that effective waveguides can be manufactured using a femtosecond laser micromachining technique to produce a linearly tapered plasma density, which enables the energy of the accelerator to be enhanced significantly. A laser guiding efficiency in excess of 82% at sub-relativistic intensities has been demonstrated in a 40 mm long capillary with a diameter tapering from 320 μm to 270 μm, which gives rise to an on-axis, time-averaged plasma density that varies from 1.0 × 1018 cm−3 to 1.6 × 1018 cm−3.