Abstract
We present measurements of two-color X-ray free electron laser (FEL) pulses generated with a novel scheme utilizing a sextupole magnet. The sextupole, in combination with a standard orbit control tool, is used to suppress the radiation from the bunch core, while keeping the head and the tail of the beam lasing, each at a different photon energy. The method is simple, cost-effective and applicable at any repetition rate. We demonstrate the tunability of the scheme and discuss its advantages and practical limitations.
Highlights
X-ray free-electron lasers (FEL) emit radiation at very short wavelengths down to the angstrom level
We present measurements of two-color x-ray free electron laser (FEL) pulses generated with a novel scheme utilizing a sextupole magnet
The FEL wavelength resonance condition for planar undulators is a function of the electron beam Lorentz factor γ, the undulator period length λu, and the undulator field strength parameter K [19]: λ
Summary
X-ray free-electron lasers (FEL) emit radiation at very short wavelengths down to the angstrom level. Demonstration of two-color x-ray free-electron laser pulses with a sextupole magnet We present measurements of two-color x-ray free electron laser (FEL) pulses generated with a novel scheme utilizing a sextupole magnet.
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