Twin-pulse seeding enables pump-probe capabilities in the EUV to soft X-ray spectrum at synchrotron light sources

Feasibility study of an adjustable two-stage separation

Seeding coherent EUV to soft X-ray emission can be accomplished using a compact EEHG design via two SSs of a SR^1,2. This design utilizes the BM section between these two SSs as the first chicane. However, one of the key EEHG parameters, the momentum compaction of chicane 1, is completely determined by the SR lattice while the energy modulation of stage 1 is chosen to have an optimal and reasonably low value (typically \(A_{1} = 2.5\))¹. For each harmonic, the final energy spread only varies as a function of the momentum compaction of…