%0 Figure %A Kumar, Sandeep %A Kang, Heung-Sik %A Kim, Dong Eon %D 2013 %T (a) The longitudinal energy spread of the e-bunch %U https://iop.figshare.com/articles/figure/_a_The_longitudinal_energy_spread_of_the_e_bunch/1012353 %R 10.6084/m9.figshare.1012353.v1 %2 https://iop.figshare.com/ndownloader/files/1480175 %K esase %K attosecond radiation pulse %K fwhm %K nm %K profile %K RF phase %K laser %K undulator %K Atomic Physics %K Molecular Physics %X

Figure 4. (a) The longitudinal energy spread of the e-bunch. (b) The current profile of the e-bunch. (c) The normalized emittance (x, y) of the e-bunch at the entrance of undulator. (d) The undulator radiation at a position of 50 m along 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.

%I IOP Publishing