Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Evidence of photon acceleration by laser wake fields

Murphy, C.D. and Trines, R. and Vieira, J. and Reitsma, A.J.W. and Bingham, R. and Collier, J.L. and Divall, E.J. and Foster, P.S. and Viskup, R. and Jaroszynski, D.A. and Gallacher, J.G. (2006) Evidence of photon acceleration by laser wake fields. Physics of Plasmas, 13 (3). 033108-1-033108-8. ISSN 1070-664X

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Photon acceleration is the phenomenon whereby a light wave changes color when propagating through a medium whose index of refraction changes in time. This concept can be used to describe the spectral changes experienced by electromagnetic waves when they propagate in spatially and temporally varying plasmas. In this paper the detection of a large-amplitude laser-driven wake field is reported for the first time, demonstrating photon acceleration. Several features characteristic of photon acceleration in wake fields, such as splitting of the main spectral peak and asymmetries between the blueshift and redshift for large shifts, have been observed. The experiment is modeled using both a novel photon-kinetic code and a three-dimensional particle-in-cell code. In addition to the wide-ranging applications in the field of compact particle accelerators, the concept of wave kinetics can be applied to understanding phenomena in nonlinear optics, space physics, and fusion energy research.