ILC BSY Tune-up Dump Issues
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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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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)


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)


Y (mm)

X (mm)

beam centroid motion at dump

face versus energy offset

(TURTLE tracking)

ILC BDS Meeting (M. Woodley)


Brett’s 2003

ILC BDS Meeting (M. Woodley)


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)


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)


ILC2005

ΔL = 35 m

σx = 35 μm

ηX = 12 mm

2% ΔE →Δx = 240 μm ≈ 7σx

ILC BDS Meeting (M. Woodley)


ILC BDS Meeting (M. Woodley)


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)


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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