Abstract
Narrow band undulator radiation tuneable over the wavelength range of 150-260 nm has been produced by short electron bunches from a 2 mm long laser plasma wakefield accelerator based on a 20 TW femtosecond laser system. The number of photons measured is up to 9 × 106 per shot for a 100 period undulator, with a mean peak brilliance of 1 × 1018 photons/s/mrad2/mm2/0.1% bandwidth. Simulations estimate that the driving electron bunch r.m.s. duration is as short as 3 fs when the electron beam has energy of 120-130 MeV with the radiation pulse duration in the range of 50-100 fs.
Original language | English |
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Article number | 264102 |
Number of pages | 6 |
Journal | Applied Physics Letters |
Volume | 104 |
Issue number | 26 |
DOIs | |
Publication status | Published - 30 Jun 2014 |