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RF phase effect of linac column L2 on the electron-bunch length, current profile after the chicane (main peak, second peak and third highest peak) and the radiation power at a position of 50 m in the undulator

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posted on 2013-08-13, 00:00 authored by Sandeep Kumar, Heung-Sik Kang, Dong Eon Kim

Figure 6. RF phase effect of linac column L2 on the electron-bunch length, current profile after the chicane (main peak, second peak and third highest peak) and the radiation power at a position of 50 m in the undulator.

Abstract

The generation of an isolated attosecond pulse at 0.1 nm has been proposed in an ESASE scheme where an 800 nm, 5 fs FWHM carrier-envelop-phase stabilized laser is employed in the 10 GeV Pohang accelerator laboratory—x-ray free electron laser (PAL-XFEL). The radio-frequency (RF) phase effect has been studied on the current profile after the chicane and on the x-ray radiation power at 50 m along the undulator. This study leads to the tolerance in the RF phase. The results show that a single isolated attosecond radiation pulse could be produced inside the undulator; however, the RF phase should be controlled down to 0.05° in the linac section of the PAL-XFEL in order to satisfy the requirement for RF jitters suitable for pump–probe experiments.

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