April 4, 2006 Y. Nosochkov and M. Woodley (SLAC) 1

ILC BSY (2006b)

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total length ≈ 650 m

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wire scanners

σx = 29 μmηX = 20 mmΔE = 2%Δx = 400 μm ≈ 14σx

April 4, 2006 Y. Nosochkov and M. Woodley (SLAC) 4

total length ≈ 470 m

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dump

to IRTs

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MPSβ-collimators

skewcorrection

2D emittancemeasurement

Ф = 96,54,12 mm

Ф = 4 mm

MPSE-collimator

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Brett Parker’s BMP dipoles (20)

vacuum chamberФ=15 mm OD

0

20

0.25% (500 GeV beam)x

x x

mm

12.5 mm

total length = 114.6 m

energy BPM

window

laserwiredetector (ε)

MPS energy collimator

ΔE/E = ±10%trajectories

Diagnostic Chicane

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vacuum chamberФ=15 mm

laserwire photonsgo through here

Brett’s BMP magnet has a wide (±28 mm) clear horizontal aperture … put in a small (but reasonable) vacuum chamber for the beam and use the reamining clear aperture to pass laserwire photons

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kickerssepta

Ф = 8 cm

sextupole

Tesla “Type B”quadrupoles

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TESLA “Type B” quadrupole• Lcore = 1.5 m• bore radius = 10 mm• max pole-tip field = 7.9 kG

40 mm

Tesla Kickers

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rasterkickers

dump

no vertical bending

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• chicane dipoles (20)– Brett Parker’s “BMP” dipoles– L = 2.8 m, horizontal full aperture ≈ 56 mm, vertical full aperture ≈ 34 mm– θ ≈ 100 μrad: B = 0.06 T @ 1 TeV cm– total chicane SR emittance growth < 0.25% @ 1 TeV cm (DIMAD)

• fast extraction kickers (25)– in-vacuum stripline devices– L = 2 m, horizontal full aperture = 40 mm, vertical aperture < 40 (> 20) mm– θ ≈ 16 μrad: B = 0.0133 T @ 1 TeV cm– 100 ns rise-time, ? kV/cm, 225 MW total pulser power, 5 thyratron pulsers, 1 cable per kicker (≈ 20 kV)

• for “tuneup” mode, assume large gap DC dipoles wrapped around (some of) the fast extraction kickers

• septa (5)– current-sheet devices, 10 mm thick blade– L = 2 m, horizontal full aperture = 30 mm– θ ≈ 0.6 &1.2 mrad: B = 0.5 T (3), 1.0 T (2) @ 1 TeV cm

• rastering kickers (10 horizontal, 10 vertical)– L = 0.8 m, full aperture = 80 mm– θ ≈ 26 μrad: B = 0.054 T @ 1 TeV cm– 3 cm sweep radius (1.4 μm × 1.4 μm beam size at dump window) … factor of ≈ 25 reduction in dE– reference TESLA Report 2001-05 (Maslov)

Some Magnet Details