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

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)


Ilc bsy tune up dump issues

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)


Ilc bsy tune up dump issues

Y (mm)

X (mm)

beam centroid motion at dump

face versus energy offset

(TURTLE tracking)

ILC BDS Meeting (M. Woodley)


Ilc bsy tune up dump issues

Brett’s 2003

ILC BDS Meeting (M. Woodley)


Ilc bsy tune up dump issues

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)


Ilc bsy tune up dump issues

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)


Ilc bsy tune up dump issues

ILC2005

ΔL = 35 m

σx = 35 μm

ηX = 12 mm

2% ΔE →Δx = 240 μm ≈ 7σx

ILC BDS Meeting (M. Woodley)


Ilc bsy tune up dump issues

ILC BDS Meeting (M. Woodley)


Ilc bsy tune up dump issues

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

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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