Spin Dynamics at the NLC

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Comments for 2 mrad energy spectrometer and
polarimeter chicanes
ILC BDS Ken Moffeit 19 April 05
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• Current design requires changing magnet current
  with beam energy.
• Need drift space (20 m) to get Compton e- to
  detector.
• Incorporate a four magnet polarimeter chicane
  along the 2 mrad line between BHEX3 and BHEX4.
  Requires 50 meters for chicane. Should the
  chicane be in the vertical or horizontal plane?

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Polarimeter Chicane
X(mm)
y(mm)
S (mm)
Polarimeter Chicane
S (mm)
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(No Transcript)
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Tracking in the region of the Polarimeter Chicane
X(mm)
Polarimeter Chicane
S (mm)
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Energy Chicane
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90 meters
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Polarimeter Chicane
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Polarimeter Chicane side view
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Summary

• Energy Chicane needs 90 m
• Polarimeter Chicane along the 2 mrad line needs
  52 m
• Beam stay clear - 10cm ?