Figure 2
The layout of the full beamline (top view). The focusing section (S1) comprises two adjustable-strength permanent magnet quadrupoles (S1Q1 and S1Q2) followed by four electromagnetic quadrupoles. The main dogleg-chicane section (S2) comprises eleven electromagnetic quadrupoles, each on an individual translation stage so they can be offset in the x-direction. The undulator matching section (S3) comprises six electromagnetic quadrupoles. The darker shaded quadrupoles, labelled QD, are offset from the reference trajectory (magnet centre indicated with dashed line) to bend the beam. Quadrupoles S1Q1 and S1Q2 have a magnetic length of 100 mm, quadrupoles S1Q3, S1Q4, S3Q3, S3Q4, S3Q5 and S3Q6 have a magnetic length of 150 mm and all the other quadrupoles have a magnetic length of 250 mm.
