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ILC BSY Tune-up Dump Issues

ILC BSY Tune-up Dump Issues. most recent NLC design (May 2003) high bandwidth ( ± 20% acceptance to dump) uses scaled SLC SBD kicker magnets to extract (abort & tune-up) has no beam energy diagnostics extraction timing (kicker pulse length, etc.) not considered

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ILC BSY Tune-up Dump Issues

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  1. ILC BSY Tune-up Dump Issues • most recent NLC design (May 2003) • high bandwidth (±20% acceptance to dump) • uses scaled SLC SBD kicker magnets to extract (abort & tune-up) • has no beam energy diagnostics • extraction timing (kicker pulse length, etc.) not considered • Brett Parker’s “fast extraction” design (March 2003) • purpose-designed magnets • incorporates energy diagnostic chicane • minimal optics • design a hybrid system for ILC • proper diagnostics and timing for ILC bunch trains • Brett’s magnets (perhaps updated designs) • high bandwidth • PAC′05 abstract submitted, but … ILC BDS Meeting (M. Woodley)

  2. NLC2003 kickers (5) L = 3 m θ = 1 mrad > 5 kG @ 500 GeV • TESLA “Type B” quadrupole • Lcore = 1.5 m • bore radius = 10 mm • max pole-tip field = 7.9 kG ILC BDS Meeting (M. Woodley)

  3. Y (mm) X (mm) beam centroid motion at dump face versus energy offset (TURTLE tracking) ILC BDS Meeting (M. Woodley)

  4. Brett’s 2003 ILC BDS Meeting (M. Woodley)

  5. VKI QFEX Note: dipoles will be offset in order to center all trajectories in the gaps BTU(2) BTU(2) BTU(1) QX4 QX1 HKI/TUD BMP(1) BMP(2) BMP(3) QX3 QX2 ILC BDS Meeting (M. Woodley)

  6. kickers (24) L = 1 m θ = 40 μrad 0.35 kG @ 250 GeV ΔT = 150 ns ΔV = 7 kV See Brett’s presentations at: http://www.slac.stanford.edu/~mdw/ILC/Fast_Extraction/BParker20030319.pdf and http://www.slac.stanford.edu/~mdw/ILC/Fast_Extraction/BParker20030415.pdf ILC BDS Meeting (M. Woodley)

  7. ILC2005 ΔL = 35 m σx = 35 μm ηX = 12 mm 2% ΔE →Δx = 240 μm ≈ 7σx ILC BDS Meeting (M. Woodley)

  8. ILC BDS Meeting (M. Woodley)

  9. 8 cm bore quad TESLA “Type B” BMP(2) BMP(3) HKI/TUD BMP(1) EBPM ΔE = +20% ΔS (EBPM to 1st HKI) = 67 m (≈ 450 nsec) ΔE = -20% ILC BDS Meeting (M. Woodley)

  10. What’s Next • achromat optics • 1st 8 cm bore quad … Panofsky? • timing issues • revisit dump window survivability … do we need to “paint”? • tracking studies • … not in time for PAC′05 (mea culpa) ILC BDS Meeting (M. Woodley)

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