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spreader OPTICS

spreader OPTICS. Y. Nosochkov 02-26-2014. Summary. The LCLS2sc beam will be switched between the SXR, HXR and dump lines by means of a fast vertical RF deflector (kicker) and a 3-hole horizontal Lambertson septum magnet.

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spreader OPTICS

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  1. spreader OPTICS Y. Nosochkov 02-26-2014

  2. Summary • The LCLS2sc beam will be switched between the SXR, HXR and dump lines by means of a fast vertical RF deflector (kicker) and a 3-hole horizontal Lambertson septum magnet. • The spreader bend magnets generate dispersion and R56.These are canceled by adding quadrupoles to the spreader optics. The quadrupoles can be also used for R56 tuning. • SXR spreader is a 4-bend horizontal chicane with quadrupoles. • HXR spreader is a 4-bend horizontal and vertical dogleg with quadrupoles. The two outer bends are horizontal, and the two inner bends are rolled for providing both X and Y bending. • Dump lineis a vertical and horizontal dogleg with quadrupoles. It also provides optics for energy measurement. • Vertical orbit and dispersion generated by the vertical deflector (kicker) are cancelled by 2 vertical dipole correctors placed in each of the SXR and HXR lines downstream of the septum.

  3. SXR spreader line LCLS1 SXR quads – blue LCLS-1 quads - black Bends – red Septum – red Deflector – magenta Correctors – cyan D10 dump – black septum SXR LCLS2 X-plane R56 (mm) I5 SXR 0 1.5e-8 LCLS2 Y-plane SXR LCLS1

  4. HXR spreader line LCLS1 HXR quads – green LCLS-1 quads - black Bends – red Septum – red Deflector – magenta Correctors – cyan D10 dump – black HXR septum LCLS2 X-plane R56 (mm) I5 HXR 09.9e-10 LCLS2 Y-plane HXR LCLS1

  5. Spreader dump line LCLS1 Dump quads – black LCLS-1 quads - black Bends – red Septum – red Deflector – magenta D10 dump – black D10 LCLS2 X-plane Deflector and septum are off Last X-bend deflects beam away from existing D10 hole LCLS2 Y-plane D10 LCLS1

  6. Complete layout LCLS1 SXR quads – blue HXR quads – green Dump quads – black LCLS-1 quads – black Bends – red Septum – red Deflector – magenta Correctors – cyan D10 dump – black HXR SXR D10 LCLS2 X-plane LCLS2 Y-plane SXR HXR D10 LCLS1

  7. SXR spreader optics septum kicker R56 = 0 tunable ±4 mm

  8. HXR spreader optics septum Two inner bends are rolled R56 = 0 tunable ±1 mm kicker

  9. Spreader dump line optics septum BY1 BY2 BX kicker D10 dump bx = 0.7 m, hx = -0.17 m for E-diagnostic

  10. Modified LCLS-1 optics in BSY • LCLS-1 BSY optics is changed to FODO using 6 existing quads for a lower b-function • Quads are placed outside of the divergent and biconcave chambers, so the chambers may not need to be removed D10 HXR divergent chamber biconcave chamber muon wall

  11. Complete SXR One extra bypass quad upstream and one downstream of the spreader for better match spreader

  12. Complete HXR spreader

  13. Magnets in the SXR spreader at 4 GeV

  14. Magnets in the HXR spreader at 4 GeV

  15. Magnets in the spreader dump line at 4 GeV

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