Transcript Mini-review on Kicker-Septum Scheme of the XFEL

FEL
BEAM
DYNAMCIS
Mini-review on Kicker-Septum Scheme of the XFEL
Introduction into XFEL separation scheme - W. Decking - 10 min
Separation Options for hor./ver. kicks - N. Golubeva/V. Balandin - 10 min
DC Septa Designs (Current Sheet and Lambertson) - B. Krause - 10 min
AC Septa Design and Stability - K. Mueller - 20 min
DC Power Supply Stability - J. Eckoldt - 10 min
Winni Decking
FEL
BEAM
DYNAMCIS
Collimation and Switchyard
Collimation
Diagnostics and Feedback
Distribution Kickers
Distribution Septa
SASE 2
Undulators
SASE 2
U2
tunable, planar
0.1 – 0.4 nm
electrons
-
e
U1
17.5 GeV
SASE 1
tunable, planar
0.1 nm
-
SASE 3
e
Experiments
SASE 1
tunable, helical
0.4 – 1.6 nm
Winni Decking
FEL
BEAM
DYNAMCIS
Topology – Top and Side View
Winni Decking
FEL
BEAM
DYNAMCIS
Beam Distribution
Electronen gun
Gun
Linac
5 MHz
5MHz
DumpDump
KickerKicker
(pulsepattern)
pattern)
(Pulse
Kicker
(Pulse
length
290us)
Flat Top
Kicker
Dump
Dump
o
2.2 arc
to SASE
2
15o
deflection
to Dump
a)
(pulse width 290 s)
Dump gap
290uss
290
Dump
70usGap
20 s
600
650uss
Dump gap
70us
b)
200 ns
pulser prototype measurement
•low accuracy
(>1 %)
•5 MHz burst
operation
300 s
650us
290us
•high accuracy
(< 0.01 %)
•10 Hz operation
pulser prototype measurement
Winni Decking
FEL
BEAM
DYNAMCIS
•
•
•
•
Stability
Stability goal at undulator < 1/10 s
Stability goal at dump < 10 s
Kick strength approx 300 s => rel. amplitude stability 3e-4
Septum deflection approx 4000 s => rel. amplitude stability
2.5e-5
Winni Decking
FEL
BEAM
DYNAMCIS
Options
1) Hor. Kicker + Hor. DC Septum
2) Hor. Kicker + Hor. AC Septum
3) Ver. Kicker + Hor. Lambertson Septum
Winni Decking