For the success of PAL-XFEL, two critical systems, namely a low emittance injector and a variable gap out-vacuum undulator, are under development. In order to realize the target emittance of the PAL-XFEL injector we carried out an optimization study of various parameters, such as the laser beam transverse profile, the laser pulse length, the laser phase, and the gun energy. The transverse emittance measured at the Injector Test Facility (ITF) is ε x = 0.48 ± 0.01 mm mrad. An undulator prototype based on the EU-XFEL design and modified for PAL-XFEL was built and tested. A local-K pole tuning procedure was developed and tested. A significant reduction (90%) of the local-K fluctuation was observed. The requirement of undulator field reproducibility better than 2 × 10 −4 and the undulator gap setting accuracy below 1 µm were achieved for the prototype. The optical phase jitter after the pole height tuning at the tuning gap was calculated to be 2.6 • rms, which satisfies the requirement of 5.0 • .
CESC (Cheorwon Electron-beam Service Center) for industrial applications. It is capable of producing 10-MeV electron beams with average 30-kW. The beamline consists of an E-gun, a pre-buncher, an accelerating column with a built-in bunching section, focusing solenoids and a beam scanner. The beam dynamics simulation is conducted by the PARMELA code. The nominal capability of the accelerator is obtained by the input RF power into the accelerating column and the input beam current. The optimum operation condition is also obtained by the input RF power into the pre-buncher and the input RF phase difference between the pre-buncher and the accelerating column. As per the simulation on the misalignment effect, focusing solenoids can reduce this effect. In this paper, we present simulation results for the beam commissioning scenario.
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