(Apr. 15, 2003)
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(Apr. 15, 2003) (Apr. 15, 2003) SLAC linac tunnel SLAC linac tunnel research yard research yard Linac-0 Linac-0 L L =6 m =6 m Linac-1 Linac-1 L L 9 m 9 m rf rf 25° 25° Linac-2 Linac-2 L L 330 m 330 m rf rf 41° 41° Linac-3 Linac-3 L L 550 m 550 m rf rf 10° 10° BC1 BC1 L L 6 m 6 m R 56 56 39 mm 39 mm BC2 BC2 L L 22 m 22 m R 56 56 25 mm 25 mm LTU LTU L L =275 m =275 m R 56 56 0 0 DL1 DL1 L L 12 m 12 m R 56 56 0 0 undulator undulator L L =130 m =130 m 6 MeV 6 MeV z z 0.83 mm 0.83 mm 0.05 % 0.05 % 135 MeV 135 MeV z z 0.83 mm 0.83 mm 0.10 % 0.10 % 250 MeV 250 MeV z z 0.19 mm 0.19 mm 1.6 % 1.6 % 4.54 GeV 4.54 GeV z z 0.022 mm 0.022 mm 0.71 % 0.71 % 14.1 GeV 14.1 GeV z z 0.022 mm 0.022 mm 0.01 % 0.01 % ...existing linac ...existing linac new new rf rf gun gun 21-1b 21-1b 21-1d 21-1d X Linac- Linac-X L L =0.6 m =0.6 m rf rf = = 21-3b 21-3b 24-6d 24-6d 25-1a 25-1a 30-8c 30-8c Phase Phase and and voltage voltage jitter in each linac, plus jitter in each linac, plus charge charge and and gun-timing gun-timing jitter, cause final jitter, cause final energy energy , peak , peak current current , and , and timing timing jitter. jitter.
description
Phase and voltage jitter in each linac, plus charge and gun-timing jitter, cause final energy , peak current , and timing jitter. 250 MeV z 0.19 mm 1.6 %. 4.54 GeV z 0.022 mm 0.71 %. 14.1 GeV z 0.022 mm 0.01 %. 6 MeV z 0.83 mm - PowerPoint PPT Presentation
Transcript of (Apr. 15, 2003)
(Apr. 15, 2003)(Apr. 15, 2003)
SLAC linac tunnelSLAC linac tunnel research yardresearch yard
Linac-0Linac-0L L =6 m=6 m
Linac-1Linac-1L L 9 m9 m
rf rf 25°25°
Linac-2Linac-2L L 330 m330 mrf rf 41°41°
Linac-3Linac-3L L 550 m550 mrf rf 10°10°
BC1BC1L L 6 m6 m
RR5656 39 mm39 mm
BC2BC2L L 22 m22 m
RR5656 25 mm25 mm LTULTUL L =275 m=275 mRR56 56 0 0
DL1DL1L L 12 m12 mRR56 56 0 0
undulatorundulatorL L =130 m=130 m
6 MeV6 MeVz z 0.83 mm 0.83 mm 0.05 %0.05 %
135 MeV135 MeVz z 0.83 mm 0.83 mm 0.10 %0.10 %
250 MeV250 MeVz z 0.19 mm 0.19 mm 1.6 %1.6 %
4.54 GeV4.54 GeVz z 0.022 mm 0.022 mm 0.71 %0.71 %
14.1 GeV14.1 GeVz z 0.022 mm 0.022 mm 0.01 %0.01 %
...existing linac...existing linac
newnew
rfrfgungun
21-1b21-1b21-1d21-1d XX
Linac-Linac-XXL L =0.6 m=0.6 mrfrf= =
21-3b21-3b24-6d24-6d
25-1a25-1a30-8c30-8c
PhasePhase and and voltagevoltage jitter in each linac, plus jitter in each linac, plus chargecharge and and gun-gun-timingtiming jitter, cause final jitter, cause final energyenergy, peak , peak currentcurrent, and , and timingtiming jitter. jitter.
parameterparameterEE//EE00| = | =
0.1%0.1%II//II00| = 12%| = 12% ttff| = 100 fs| = 100 fs unitunit
ttii 1.61.6 4.44.4 1.51.5 psecpsec
QQQQ00 4646 5.25.2 2424 %%
00 3.53.5 0.650.65 5.95.9 deg-Sdeg-S
VV00//VV00 0.320.32 0.240.24 0.950.95 %%
11 0.320.32 0.170.17 1.01.0 deg-Sdeg-S
VV11//VV11 0.290.29 0.250.25 0.780.78 %%
XX 5.55.5 1.41.4 7.67.6 deg-Xdeg-X
VVXX//VVXX 2.02.0 1.21.2 6.36.3 %%
22 0.540.54 0.210.21 0.0840.084 deg-Sdeg-S
VV22//VV22 1.11.1 1.01.0 0.130.13 %%
33 0.350.35 24.824.8 1515 deg-Sdeg-S
VV33//VV33 0.150.15 5.75.7 8.68.6 %%
LCLS longitudinal jitter sensitivities for gun and each linac sectionLCLS longitudinal jitter sensitivities for gun and each linac section
EE
EE = = EE00
RF RF PhasePhase Jitter and Energy Feedback Jitter and Energy Feedback
with energy feedbackwith energy feedbackwithout energy feedbackwithout energy feedback
tt
EE
EE = = EE00
tt
Gun Gun TimingTiming Jitter and Energy Feedback Jitter and Energy Feedback
tt
EE
EE = = EE00
tt tt
EE
EE = = EE00
tt
with energy feedbackwith energy feedbackwithout energy feedbackwithout energy feedback
Energy feedback in chicanes causes 1-to-1 gun-timing to final timing jitter!Energy feedback in chicanes causes 1-to-1 gun-timing to final timing jitter!
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