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Howell, D. F.

Paper Title Page
TUPC124 Development of a High Power Fibre Laser for Laser Based Electron Beam Diagnostics 1359
 
  • L. Corner, N. Delerue, M. Newman, R. Walczak
    OXFORDphysics, Oxford, Oxon
  • G. A. Blair, S. T. Boogert
    Royal Holloway, University of London, Surrey
  • L. Corner, D. F. Howell, L. J. Nevay
    JAI, Oxford
 
  We present the latest results on the development of a high power fibre laser system for the laserwire project on ILC-like laser based electron beam diagnostics. The laser consists of a solid state oscillator which can be synchronised to an external frequency reference, and two amplification stages in double clad doped fibre, giving 1uJ pulses in a burst mode suitable for the ATF2 laserwire project. This output is amplified in large mode area photonic crystal fibre to generate the high pulse energy necessary for Compton scattering without any deleterious nonlinear effects, whilst maintaining the high spatial mode quality and beam pointing stability of a fibre laser. These properties are essential for producing the sub-micron spot sizes required for the measurement of small particle beam sizes.  
TUPC011 Micron Size Laser-wire System at the ATF Extraction Line 1065
 
  • A. Aryshev, G. A. Blair, S. T. Boogert, G. E. Boorman, A. Bosco, L. Corner, L. Deacon, N. Delerue, B. Foster, F. Gannaway, D. F. Howell, V. Karataev, L. J. Nevay, M. Newman, R. Senanayake, R. Walczak
    JAI, Oxford
  • H. Hayano, N. Terunuma, J. Urakawa
    KEK, Ibaraki
 
  The ATF extraction line laser-wire system has recently been upgraded allowing the measurement of micron scale transverse size electron beams. We report on the hardware upgrades, including focusing lens, laser and mechanical systems. First measurements using the new system from recent operation at the ATF in KEK are presented.