Speaker
Description
The dynamical focusing of FEL undulators with variable gap in
FODO lattices with varying but overall low energy is detrimental the FODO optics.
In the absence of compensation by adjusting the FODO quadrupole strengths
it may drive the cell unstable.
Typical examples of FELs in the critical regime are FLASH at DESY and the
SXFEL-SBP at the Shanghai Synchrotron Radiation Facility.
Before, in our contributions to FEL 2024 and IPAC 2025 we have extensively discussed
the case where the undulators are centered inside the FODO drift of a Lattice with
symmetric FODO cells.
Here we treat the fairly common case where the drifts on each side of the undulator are unequal,
which has significant impact on the compensation strategy and stability issues.
| In which format do you inted to submit your paper? | LaTeX |
|---|