2 papers
physics.acc-ph2024
Automatic adjustment of undulator optics for FELs
Zhichu Chen, Bart Faatz
In this paper, we describe a way to automatically adjust the quadrupole focusing along the undulator to avoid the instabilities, taking into account energy change and undulator foc…
physics.acc-ph2023
Linear Coupling of Transverse Betatron Oscillations. Dynamic Stability and Invariants of Motion
Stephan I. Tzenov, Zhichu Chen, Hailong Wu
Based on the technique of the discrete one-turn transfer maps, the problem of linear coupling between horizontal and vertical betatron oscillations in an accelerator has been treat…