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Transfer Line Linac4 to PSB: Injection Aperture Limitations

Transfer Line Linac4 to PSB: Injection Aperture Limitations. Outline. Aperture at BIS and DIS Aperture in the PSB injection region: Review of injected and circulating beam envelope Foil BSW Valves. Linac4 to PSB: DIS and SMV.

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Transfer Line Linac4 to PSB: Injection Aperture Limitations

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  1. Transfer Line Linac4 to PSB: Injection Aperture Limitations

  2. Outline • Aperture at BIS and DIS • Aperture in the PSB injection region: • Review of injected and circulating beam envelope • Foil • BSW • Valves

  3. Linac4 to PSB: DIS and SMV • Only “all matched” optics (b=5m, D=-1.4 m), beam envelope calculated from optics parameters, No tracking! Aperture OK: 50X100 mm (H x V) for DIS and 70 X 32 mm for SMV (specifications from A. Lombardi tracking studies for different optics)

  4. W. Weterings Foil and Support Estimated beam size on the foil for zero dispersion (left) and matched (-1.4 m) dispersion (right) at injection point. PSB beam envelope (Ø54mm) during injection is also shown. (L4-T-EP-0005, EDMS 1108941)

  5. W. Weterings Injection Region

  6. W. Weterings Injection Region

  7. W. Weterings Injection Region

  8. W. Weterings BSW1 Minimal Clearance Injected Beam Painted Beam Circulating Beam

  9. W. Weterings BSW2-3 Painted Beam Circulating Beam

  10. W. Weterings BSW4 Minimal Clearance Dumped H- Beam Dumped H0 Beam Painted Beam Circulating Beam All components aligned with inside aperture of PSB ring

  11. Beam Envelope at the BSW C. Bracco B. Goddard Circulating beam size Injected beam size

  12. W. Weterings Foil and Support Ø56 Estimated beam size on the foil for zero dispersion (left) and matched (-1.4 m) dispersion (right) at injection point. PSB beam envelope (Ø56mm) during injection is also shown. (L4-T-EP-0005, EDMS 1108941)

  13. Aperture Scheme 126.2 106.2 101.8 36.4 49.2 56.0 Circulating beam 65.8 BSW4 BSW3 BSW2 BSW1

  14. Aperture Scheme 35 mm from KSW for horizontal painting 91.2 71.2 66.8 14.2 1.4 Circulating beam 56.0 35.0 65.8 BSW4 BSW3 BSW2 BSW1

  15. Aperture Scheme 35 mm from KSW for horizontal painting 45.9 mm from BSW chicane bump 50.1 46.4 78.7 20.9 1.7 Circulating beam 45.9 56.0 35.0 65.8 BSW4 BSW3 BSW2 BSW1

  16. Aperture Scheme 35 mm from KSW for horizontal painting 45.9 mm from BSW chicane bump 34.8 H-beam H+ Injectedbeam 20.9 H0beam Circulating beam 45.9 56.0 35.0 65.8 BSW4 BSW3 BSW2 BSW1

  17. Zoom at BSW1 Pipe for injected beam?? 56.0 H+ Injectedbeam 11.0 34.8 21.4 Circulating beam 56.0 BSW1

  18. Zoom at BSW4 Diagnostics + Dump? 9.9 14.7 H-beam 11.1 34.8 34.8 H0 beam 0.5 Circulating beam 56.0 BSW4

  19. Conclusions • Spec for BIS and DIS as from previous studies • Injected (±17.4 mm) and circulating (±28 mm) beam envelope calculated for -1.4 m dispersion and considering mechanical offset • Bottlenecks: • Foil still ok but 1 mm lost on each side of the foil • BSW1 for circulating beam when painting and chicane on (1.7 mm clearance) • Beam pipe for injected beam • Separation H0-proton beam: 0.5 mm not enough for dump and diagnostics

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