Undulator Quad Magnetic Measurements and Fiducialization

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Undulator Quad Magnetic Measurements and
Fiducialization

• Scott Anderson
• April 29, 2008

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Magnetic Measurements

• 12 Undulator Quads have been measured with the
  rotating coil.
• Quad Main Measurements are
• Integrated gradient.
• Harmonics.
• Center shift vs current /- 25 near nominal
• Trim measurements
• Center shift vs current (/- 0.5 amps)
  harmonics.

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Integrated Gradient
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Und Quad Harmonics
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Coil Measurement Schedule

• 1 Undulator quad measured every 2 days. 22 quads
  left to measure 44 work days.
• Final Magnet June 26th.
• Possible problems
• Alignment and Tech support
• Computer problems. Need to remove ENET/GPIB
  routers from network.

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Wire Fiducialization

• The Wire Fiducial system has been calibrated and
  extensively tested.
• 4 Undulator Quads have been fiducialized using
  the vibrating wire method.

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Wire Fiducial Calibration

• Wire detectors calibrated to lt 1.5 microns.
• Quad stage movement repeatability
• X Y lt 1.0 micron
• Pitch lt 0.05 mrad
• Yaw lt 0.15 mrad
• End Pin Check
• Wire location calculated from end pins vs located
  by wire detectors within 5 microns of each other.
• Optical Check X 140, Y 23.9 microns
  difference to wire magnetic center. Difficult to
  access X tooling ball.

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Wire Fiducial Calibration (cont)

• 1st quad measured 9 times. Wire located to 1 µm
  for X and Y. Magnet Tooling Balls located to lt 3
  µm
• Mechanical Center vs Magnetic Center
• Q740 X -23.4, Y 42.7 µm
• Q738 X 3.7, Y 11.2 µm
• Q737 X 11.1, Y -1.3 µm
• Q728 X 12.3, Y 23.1 µm

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Wire Fiducial Offset

• Center difference between -4.3 to 4.3 amps
• Q 000740 X -2.4, Y 0.7 microns
• Q 000738 X 5.3, Y 0.4 microns
• Q 000737 X 2.7, Y -1.0 microns
• Q 000728 X 1.8, Y 0.6 microns

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Fiducial Schedule

• 1 Undulator quad measured every 1.5 days. 30
  quads left to measure 45 work days 3 days for
  reference magnet check.
• Final magnet June 30th.
• Problems Computers!
• Moved ENET/GPIB routers to own subnet.
• Reloading Quindos (CMM) software.
• Remote access crash.