Transcript Slide 1

ILC Beam Delivery System layout
with end-of-linac undulator
November 2005
M. Woodley
1
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 (< undulator aperture radius)
- energy diagnostic chicane upstream of undulator
- 100 m fast extraction to "low power" dump upstream of undulator
(~500 bunches @ 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
- Yuri's latest dump lines
positron side
+ ≈1 μm minimum beam size diagnostic section (three 45° FODO cells), including
consumable/renewable MPS betatron collimation … Ax,Ay ≈ 8 mm (< BSY quadrupole aperture
radius)
+ energy diagnostic chicane
+ fast extraction (pulsed in tuneup mode) to "full power" (18 MW) dump
+ 8 mrad big bend (for 2 mrad IP)
+ FF9 collimation/FF
+ Yuri's latest dump lines
November 2005
M. Woodley
2
ILC e+ production system layout (end of linac)
==============================================
electron beamline segments
MPSCOL
MPSCHIC
FEX
UND
EBSYARC
SKEW
DIAG
TUX
BIGB
IRT
FF9P
EX14
EX2
=
75 m !MPS collimation / betatron oscillation detection
= 100 m !MPS chicane for energy offset detection
= 100 m !kickers + drift (T. Mattison "Limited Aperture" parameters)
= 250 m !200 m active undulator + 40 m FODO + 10 m extra
=
45 m !3 mrad arc (bending radius ≈ 14.5 km)
= 200 m !50 m for e-/γ separation + NLC skew correction section
= 100 m !65 m beta, 1.15 um spot at quad center (1 TeV cm, γεy = 2×10-8 m)
=
50 m !pulsed bends + drift (pulsed bends twice as strong as kickers)
= 115 m !8 mrad arc (bending radius ≈ 14.5 km)
= 115 m !same as BIGB
= 2140 m !polarimeter chicane + match + FF9
= 400 m !Yuri's 14 mrad dump line (051004)
= 680 m !Yuri's 2 mrad dump line (050812)
positron beamline segments
SKEW
DIAG
=
=
FEX/TUX =
BIGB
IRT
FF9P
EX14
EX2
November 2005
=
=
=
=
=
150 m !NLC skew correction section
100 m !65 m beta, 1.15 um spot at quad center (1 TeV cm, γεy = 2×10-8 m);
!includes MPS collimation / betatron oscillation detection
100 m !kickers + drift (T. Mattison "Limited Aperture" parameters);
!includes pulsed bends for tuneup mode
115 m !8 mrad arc (bending radius ≈ 14.5 km)
115 m !same as BIGB
2140 m !polarimeter chicane + match + FF9
400 m !Yuri's 14 mrad dump line (051004)
680 m !Yuri's 2 mrad dump line (050812)
M. Woodley
3
MPS-coll
10 mrad
chicane
FEX
IR2
2 mrad
undulator
8 mrad arc
3 mrad arc
8 mrad arc
7 mrad
skew
ε-diag + MPS-coll
skew
chicane
ε-diag
FEX/TUX
TUX
IRT
IRT
-line
target
3m
e+ capture
e+ return
e+ return
under BDS
IR1
14 mrad
November 2005
M. Woodley
4