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Open Access Publications from the University of California

Infrared single spike pulses generation using a short period superconducting tape undulator at APEX

  • Author(s): Filippetto, D
  • Papadopoulos, CF
  • Penn, G
  • Prestemon, S
  • Sannibale, F
  • Pellegrini, C
  • Yoon, M
  • et al.

We report on the possibility of constructing an infrared FEL by combining a novel design super-conducting undu-lator developed at LBNL with the high brightness beam from the APEX injector facility. Calculations show that the resulting FEL is expected to deliver a saturated power of over a MW within a ∼4 m undulator length when operating in Self-Amplified-Spontaneus-Emission mode, with a single-spike of coherent radiation at ∼ 2 μm wavelength. The sub-cm undulator periods, associated with the relatively low energy of the APEX beam (20-25 MeV), forces the FEL to operate in a regime with unusual and interesting characteristics. The alternative option of laser seeding the FEL is also briefly examined, showing the potential to reduce the saturation length even further.

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