Speaker
Description
High current electron bunches with lower emittance and slice energy spread are required to generate the intense XFEL. However, it is difficult to maintain the emittance and slice energy spread during the bunch compression at magnetic bunch compressors (BC). The higher current peaks in the head and tail of compressed bunches spoil the core slices by the wakefield and coherent synchrotron radiation. We suppress these collective effects by the bunch spacing with a laser heater (LH) and collimators. Head and tail slices can be eliminated by collimators in the BCs. The effects from the head and tail slices are strongly suppressed to dilute them by the intense laser heating in the LH. In this paper, we present the bunch spacing with the LH and collimators in simulations and experiments. Also, we present the FEL improvement by these bunch spacing.
Funding Agency
This work is supported by MSIP, Korea.
| Region represented | Asia |
|---|---|
| Paper preparation format | Word |
