ILC Beam Delivery System layout with end-of-linac undulator

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ILC Beam Delivery System layout with end-of-linac
undulator
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• ILC e production system layout (end of linac)
• electron side
• - undulator length 250 m (200 m active
  undulator 40 m FODO focusing 5 m at each
• end for other stuff)
• - gamma drift 1 km (end of undulator to target)
• - tunnel separation 3 m (BDS tunnel centerline
  to gamma beam centerline, at target)
• - consumable/renewable MPS betatron collimation
  u/s of undulator (three 25 m 60
• undulator FODO cells) Ax,Ay 2 mm (lt
  undulator aperture radius)
• - energy diagnostic chicane upstream of undulator
• 100 m fast extraction to "low power" dump
  upstream of undulator
• (500 bunches _at_ 500 GeV occasionally)
• - common BDS 3 mrad arc (for 14 mrad IR)
• - 1 µm minimum beam size diagnostic section
  (three 45 FODO cells)
• - pulsed extraction to "full power" (18 MW)
  tuneup dump
• - 8 mrad big bend (for 2 mrad IP)
• - FF9 collimation/FF

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ILC e production system layout (end of
linac)
electron beamline segments MPSCOL 75 m
!MPS collimation / betatron oscillation
detection MPSCHIC 100 m !MPS chicane for
energy offset detection FEX 100 m !kickers
drift (T. Mattison "Limited Aperture"
parameters) UND 250 m !200 m active
undulator 40 m FODO 10 m extra EBSYARC 45
m !3 mrad arc (bending radius 14.5 km) SKEW
200 m !50 m for e-/? separation NLC skew
correction section DIAG 100 m !65 m beta,
1.15 um spot at quad center (1 TeV cm, ?ey
210-8 m) TUX 50 m !pulsed bends drift
(pulsed bends twice as strong as kickers) BIGB
115 m !8 mrad arc (bending radius 14.5
km) IRT 115 m !same as BIGB FF9P 2140
m !polarimeter chicane match FF9 EX14
400 m !Yuri's 14 mrad dump line (051004) EX2
680 m !Yuri's 2 mrad dump line
(050812) positron beamline segments SKEW
150 m !NLC skew correction section DIAG 100
m !65 m beta, 1.15 um spot at quad center (1 TeV
cm, ?ey 210-8 m) !includes
MPS collimation / betatron oscillation
detection FEX/TUX 100 m !kickers drift (T.
Mattison "Limited Aperture" parameters)
!includes pulsed bends for tuneup
mode BIGB 115 m !8 mrad arc (bending radius
14.5 km) IRT 115 m !same as BIGB FF9P
2140 m !polarimeter chicane match FF9 EX14
400 m !Yuri's 14 mrad dump line (051004) EX2
680 m !Yuri's 2 mrad dump line (050812)
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MPS-coll
10 mrad
chicane
FEX
IR2 2 mrad
undulator
8 mrad arc
skew
7 mrad
3 mrad arc
8 mrad arc
e-diag MPS-coll
skew
chicane
e-diag
FEX/TUX
TUX
IRT
IRT
?-line
target
3 m
e capture
e return under BDS
e return
IR1 14 mrad