PRELIMINARY DESIGN OF NEW CONNECTION LINES: BSY TO A-LINE AND CU-LINAC TO SXR Y. Nosochkov April 1, 2015

Spreader schematic with connections from Cu-linac to SXR and from BSY to A-line 04/01/2015 2

Realistic layout with kicker/septum for transport from BSY to A-line 04/01/ Quads: SXR – cyan HXR – green Dumpline – black CuRF – black Bends: – magenta Septum: SXR – red HXR – blue Kicker: SXR – red HXR – blue Correctors: SXR – red HXR – blue D10 dump: – black to A-line HXR SXR Cu-linac LCLS2 Cu-linac X-plane Y-plane D10 SXR HXR

Connecting BSY with A-line 04/01/ Insert kicker/septum downstream of HXR merge bend to connect with A-line HXR beam Cu-linac beam

BSY matched to existing A-line optics 04/01/ Magnetic kicker (~MHz) and septum in BSY, and a DC bend magnet in A-line. Septum and bend are slightly rolled for match to A-line geometry. Magnetic field for 10 GeV beam. K S BA-lineBSY Kicker: 5m x 70G Septum: 4.72 kGm Bend: 1.79 kGm

Layout with dogleg connection from Cu-linac to SXR 04/01/ Quads: SXR – cyan HXR – green Dumpline – black CuRF – black Bends: – magenta Septum: SXR – red HXR – blue Kicker: SXR – red HXR – blue Correctors: SXR – red HXR – blue D10 dump: – black to A-line HXR SXR Cu-linac LCLS2 Cu-linac X-plane Y-plane D10 SXR HXR

Optics of the dogleg from Cu-linac to SXR 04/01/ ~45° rolled outer bends Minor zigzag in the middle of the dogleg using two weak bends to cancel R56 (not in scale) CuRF SXR L = 74.5 m Bends: 6.27 kGm, 0.52 kGm at 15 GeV R56=0 not yet tunable Quads at center are too strong

Optics of the SXR spreader before match with the dogleg 04/01/ Additional quads are needed in SXR for a match with the dogleg optics Dogleg merging with SXR SCRF SXR

Optics of the SXR spreader matched with the dogleg 04/01/ Two new SXR quads (highlighted), and adjusted positions of QBP33, QBP34. Note reduced beta functions. Dogleg merging with SXR SCRF SXR

Matched optics from CuRF BSY to SXR 04/01/ dogleg SXR CuRF BSYwall

Complete machine from Cu-linac to SXR dump 04/01/ SXRCu-linac The SXR undulator quad field is set to GL = 3T

Tight spots 04/01/ to A-line HXR SXR Cu-linac LCLS2 X-plane D10 Q50Q2 (BSY) (Magnet drawings per C. Iverson) QSP13H (HXR) dogleg pipe QCUS9

Things to do 04/01/ Reduce the dogleg quad strengths Check dogleg interferences Provide R56 tuning capability Check SXR magnet strengths at 15 GeV

Spreader layout with new transport lines: from BSY to A- line and from Cu-linac to SXR 04/01/ Quads: SXR – cyan HXR – green Dumpline – black CuRF – black Bends: – magenta Septum: SXR – red HXR – blue Kicker: SXR – red HXR – blue Correctors: SXR – red HXR – blue D10 dump: – black to A-line HXR SXR Cu-linac LCLS2 Cu-linac X-plane Y-plane D10 HXR SXR