• Corpus ID: 249151832

Laser Generation of Near-GeV Low Emittance Positron Beams

  title={Laser Generation of Near-GeV Low Emittance Positron Beams},
  author={M J V Streeter and C. Colgan and N. Cavanagh and E. V. Los' and A F Antoine and Thomas L. Audet and Mario D. Balcazar and Luke Calvin and J. Carderelli and Hamad Ahmed and Brendan Kettle and Y. Ma and Stuart P. D. Mangles and Z. Najmudin and P. P. Rajeev and Dan R. Symes and A.G.R. Thomas and G.Sarri},
We report on the first spatial and spectral characterisation of near-GeV positron beams generated in a fully laser-driven configuration. The energy-resolved geometric emittance, source size and spectrum were simultaneously measured for electrons and positrons generated from a laser-wakefield accelerated electron beam impacting on a thin high-Z converter. More than 10 5 positrons were observed within 5% of 600 MeV, with a source size smaller than 100 µ m and sub-micron geometric emittance, in… 

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