Specifications for the XFEL Beam Switchyard Kickers

1
Specifications for the XFEL Beam Switchyard
Kickers

• Winni Decking
• FEL-Beam-Dynamics-Meeting
• 29.10.2007

2
Beam Distribution

• low accuracy
• (gt1 )
• 5 MHz burst operation

• high accuracy
• (lt 0.01 )
• 10 Hz operation

pulser prototype measurement
pulser prototype measurement
3
Emittance Growth due to incoh. Synchrotron
Radiation

• Relative emittance growth per 1deg bend at 25 GeV
• Max. bending radius lt 300 m (to allow for fast
  separation) gt max beta-function 40 m

4
Beam Switchyard Optics
to T1
to dump
to T20
5
Distribution Kicker Strength Stability
kicked un-kicked
Septum thickness xseptum5 mm Tolerable
jitter njitter0.1 s Collimation
depth mcollimation85 s Beta at
Septum bseptum30 m ltBetagt at Kicker bkicker25
m
Septum
6
Kick Trajectory
0.5 mrad kick required
7
XFEL BD Kicker amd Septum Specs
8
Kicker Layout

• In or out of vacuum stripline kicker with d
  stripline distance
• Decrease of vacuum chamber size helpful
• Test on ongoing for sputtering of dlt20 mm
  ceramics
• 100 s at kicker location approx 3.5 mm

9
Possible Tests at FLASH

• Realization of the extraction scheme at FLASH
• (i.e. kicker septum beam dump) at an early
  stage would allow to test the complete hardware
  for the XFEL setup
• Installation can later be re-used for FLASH-II
• Only minor redesign of upstream collimator
  beamline and bypass necessary

courtesy of Nina Golubeva and Vladimir Balandin