Mirror systems for SwissFEL, from concept to commissioning with x-rays

The two Aramis beamlines at SwissFEL are currently under commissioning, first pilot experiments have already been carried out. In total we have 10 mirror systems, 6 offset mirrors and 4 mirrors in KB [1] configuration. We use bilayer mirror coatings to handle the single shot damage challenge at FELs. The optics has to keep the coherence of the FEL pulses. We use flat mirrors with figure errors on the single nm level in two-actuator mechanical bender systems. The vertically deflecting KB mirrors have a polished-in gravity sag compensation. The performance of the mirror systems has been verified with X-rays.