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John Pasley
Plasma Physics and Fusion Group, Department of Physics, University of York, Heslington, York, YO10 5DD, U.K. and Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, U.K., Tel.: 01904 322 276
I. A. Bush
Plasma Physics and Fusion Group, Department of Physics, University of York, Heslington, York, YO10 5DD, U.K. and Central Laser Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, U.K., Tel.: 01904 322 276