Tolerances in the Undulator

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Tolerances in the Undulator

• Winni Decking
• XFEl Beam Dynamics Meeting
• 23.01.06

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Assumptions

• Beam with en1 mm mrad, 17.5 GeV, ltbundgt30m

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For SASE

• We claim around 0.1 s is okay
• 3 mm trajectory amplitude
• 0.1 mrad trajectory angle
• Required only for distances in the order of a
  gain length?

Can this be relaxed ?
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For users

• Pointing stability important , again we claim 0.1
  s
• Required only for the last section of the
  undulator?
• Absolute value not important, but jitter is !
• Is 0.1 s sufficient ?

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Summary ???
SASE USER
xrms 3 mm
xrms 0.1 mrad 0.1 mrad
Timing Measured to an accuracy lt 30 fs