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Undulator / FEL Commissioning Plans Heinz-Dieter Nuhn, SLAC / SSRL September 22, 2004. FY2004 Undulator Parameter Changes Summary of January Undulator Commissioning Workshop Undulator Commissioning Issues FEL Characterization. Far Hall. Undulator. Near Hall. Linac Coherent Light Source. - PowerPoint PPT Presentation
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Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Undulator / FEL Commissioning PlansHeinz-Dieter Nuhn, SLAC / SSRL
September 22, 2004
Undulator / FEL Commissioning PlansHeinz-Dieter Nuhn, SLAC / SSRL
September 22, 2004
FY2004 Undulator Parameter Changes
Summary of January Undulator Commissioning Workshop
Undulator Commissioning Issues
FEL Characterization
FY2004 Undulator Parameter Changes
Summary of January Undulator Commissioning Workshop
Undulator Commissioning Issues
FEL Characterization
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Linac Coherent Light Source
Near Hall
Far Hall
Undulator
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
FEL Design Changes Since the May 2003 Lehman ReviewFEL Design Changes Since the May 2003 Lehman Review
Canting of Undulator Poles
Remote Undulator Roll-Away and K Adjustment Function
Increase in Undulator Gap
Reduction in Maximum Beam Energy
Reduction in Quadrupole Gradient
Increase in Beta Function
Increase in Break Section Length
Electromagnetic Quadruples
Canting of Undulator Poles
Remote Undulator Roll-Away and K Adjustment Function
Increase in Undulator Gap
Reduction in Maximum Beam Energy
Reduction in Quadrupole Gradient
Increase in Beta Function
Increase in Break Section Length
Electromagnetic Quadruples
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
New: Undulator Pole Canting
•Canting comes from wedged spacers•4.5 mrad cant•Gap can be adjusted by lateral displacement of wedges•1 mm shift means 4.5 microns in gap, or 8.2 Gauss •Beff adjusted to desired value
Courtesy of Liz MoogCourtesy of Liz Moog
Suggested by J. Pflueger, DESY
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Undulator Roll-Away and K Adjustment FunctionUndulator Roll-Away and K Adjustment Function
Neutral; K=3.4965; x=+0.0 mm First; K=3.5000; x=-1.5 mm
Last; K=3.4929; x=+1.5 mm RollAway; K=0.0000; x=+100 mm
PowerTp; K=3.4804; x=+7.0 mm
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Effective B field vs. xEffective B field vs. x
Measured slope of 6.6 Gauss/mm agrees with calculations(~ 5.7 Gauss/mm for 3 mrad cant)
Field variation allowance between segments is B/B = 1.5x10-4, or B = 2 Gauss, which translates to x = 0.3 mm ( or 1 micron in gap)
Courtesy of Liz MoogCourtesy of Liz Moog
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Canting the poles helps in many ways
Facilitates final setting of Beff
Remote control of position allows run-time adjustment
Allows compensating for temperature effect on field strength: ±1.0°C temperature error would require ±1.2 mm lateral shift of undulator
Courtesy of Liz MoogCourtesy of Liz Moog
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
RMS phase error at different x positionsRMS phase error at different x positions
No significant dependence on X
An RMS phase error of ~ 6.5 degree is an upper limit for near-perfect (~100%) performance
Courtesy of Liz MoogCourtesy of Liz Moog
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Period-averaged horizontal trajectories at 14.1 GeVPeriod-averaged horizontal trajectories at 14.1 GeV
Trajectories are all well behaved and well within the 2 m tolerance for maximum walk-off from a straight line
(X in mm)
Courtesy of Liz MoogCourtesy of Liz Moog
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
May 2003 August 2004
Undulator Type planar hybridMagnet Material NdFeBWiggle Plane horizontalGap 6.0 6.8 mmGap Canting Angle 0.0 4.5 mradPeriod Length 30.0 ± 0.1 mmEffective On-Axis Field 1.325 1.249 TEffective Undulator Parameter K 3.630 ± 0.015% 3.500 ± 0.015%
Module Length 3.40 mNumber of Modules 33Undulator Magnet Length 112.2 m
Standard Break Lengths 18.7 - 18.7 - 42.1 48.2 - 48.2 - 94.9 cmTotal Device Length 121.0 131.9 m
Lattice Type FODOIntegrated QF Gradient 5.355 3.000 T/mIntegrated QD Gradient -5.295 -3.000 T/mAverage Function at 1.5 Å 18 30 mAverage Function at 15. Å 7.3 8.9 m
May 2003 August 2004
Undulator Type planar hybridMagnet Material NdFeBWiggle Plane horizontalGap 6.0 6.8 mmGap Canting Angle 0.0 4.5 mradPeriod Length 30.0 ± 0.1 mmEffective On-Axis Field 1.325 1.249 TEffective Undulator Parameter K 3.630 ± 0.015% 3.500 ± 0.015%
Module Length 3.40 mNumber of Modules 33Undulator Magnet Length 112.2 m
Standard Break Lengths 18.7 - 18.7 - 42.1 48.2 - 48.2 - 94.9 cmTotal Device Length 121.0 131.9 m
Lattice Type FODOIntegrated QF Gradient 5.355 3.000 T/mIntegrated QD Gradient -5.295 -3.000 T/mAverage Function at 1.5 Å 18 30 mAverage Function at 15. Å 7.3 8.9 m
Amplitudes of FEL Parameter ChangesAmplitudes of FEL Parameter Changes
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
May 2003 August 2004 Change
Electron Beam Energy 14.35 13.64 GeV -5.0 %Emittance 0.043 0.045 nm rad +5.2 %Avg. Electron Beam Radius 27 35 µm +27.5 %Avg. Electron Beam Divergence 1.6 1.3 µrad -17.5 %Peak Beam Power 49 46 TW -5.0 %FEL Parameter (3D) 0.00033 0.00032 -3.5 %Power Gain Length (3D) 4.2 4.3 m +3.6 %Saturation Length (w/o Breaks) 82 86 m +4.9 %Saturation Length (w/ Breaks) 89 101 m +13.5 %Peak Saturation Power 7.4 7.6 GW +2.5 %*Coherent Photons per Pulse 1.4×1012 1.5×1012 +2.5 %*Peak Brightness 1.5×1033 1.5×1033 ** +2.5 %*Average Brightness 4.6×1022 4.7×1022 ** +2.5 %*Peak Spont. Power per Pulse 91 73 GW -19.7 %
*Increase due to 3D effects (reduction in diffraction due to beam radius increase)** [Ph./s/mm2/mr2/.1%]
May 2003 August 2004 Change
Electron Beam Energy 14.35 13.64 GeV -5.0 %Emittance 0.043 0.045 nm rad +5.2 %Avg. Electron Beam Radius 27 35 µm +27.5 %Avg. Electron Beam Divergence 1.6 1.3 µrad -17.5 %Peak Beam Power 49 46 TW -5.0 %FEL Parameter (3D) 0.00033 0.00032 -3.5 %Power Gain Length (3D) 4.2 4.3 m +3.6 %Saturation Length (w/o Breaks) 82 86 m +4.9 %Saturation Length (w/ Breaks) 89 101 m +13.5 %Peak Saturation Power 7.4 7.6 GW +2.5 %*Coherent Photons per Pulse 1.4×1012 1.5×1012 +2.5 %*Peak Brightness 1.5×1033 1.5×1033 ** +2.5 %*Average Brightness 4.6×1022 4.7×1022 ** +2.5 %*Peak Spont. Power per Pulse 91 73 GW -19.7 %
*Increase due to 3D effects (reduction in diffraction due to beam radius increase)** [Ph./s/mm2/mr2/.1%]
Performance Impact of Changes (1.5 Å)Performance Impact of Changes (1.5 Å)
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Undulator / FEL Commissioning DocumentsUndulator / FEL Commissioning Documents
“Report of the LCLS Diagnostics and Commissioning Workshop”SLAC-R-715, LCLS-TN-04-02http://www-ssrl.slac.stanford.edu/lcls/technotes/LCLS-TN-04-2.pdf
LCLS PRD1.1-002 “LCLS Start-Up Test Plan”http://www-ssrl.slac.stanford.edu/lcls/prd/1.1-002-r0.pdf
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Undulator Diagnostics and Commissioning Undulator Diagnostics and Commissioning Workshop 1/19-20/04Workshop 1/19-20/04
Scope
Commissioning of the FEL Undulator with Beam
GoalsEnd-Of-Construction Goal
Defined by DOE to close-off construction project (CD-4)
One of the first Commissioning Milestones
Commissioning Goal
Get LCLS ready for operation
PrerequisitesUndulator, Diagnostics, Shielding, Beam Dump etc. in Place
Commissioning Without Beam for all Components Complete
Main Commissioning TasksCharacterization of Electron Beam Up-Stream of Undulator
Establishment of a Good Beam Trajectory Through Undulator to Beam-Dump
Characterization of Spontaneous Radiation
Establishment of SASE Gain
Characterization of FEL Radiation
Scope
Commissioning of the FEL Undulator with Beam
GoalsEnd-Of-Construction Goal
Defined by DOE to close-off construction project (CD-4)
One of the first Commissioning Milestones
Commissioning Goal
Get LCLS ready for operation
PrerequisitesUndulator, Diagnostics, Shielding, Beam Dump etc. in Place
Commissioning Without Beam for all Components Complete
Main Commissioning TasksCharacterization of Electron Beam Up-Stream of Undulator
Establishment of a Good Beam Trajectory Through Undulator to Beam-Dump
Characterization of Spontaneous Radiation
Establishment of SASE Gain
Characterization of FEL Radiation
Low ChargeSingle Shot
Low ChargeSingle Shot
Low Charge, 10 HzLow Charge, 10 Hz
10 Hz10 Hz
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
January 2004 Workshop RecommendationsJanuary 2004 Workshop Recommendations
No Intra-Undulator-Segment X-Ray Diagnostics in Baseline Design
Instead: End-of-Undulator X-Ray Diagnostics to Characterize FEL Radiation vs. z
Trajectory Distortion Method
Roll-Away Undulator Segments Function
Investigation of Spontaneous Radiation as Diagnostics Tools
Code Development to Support Commissioning
Areas for Follow-Up R&D
Study of Spectral and Spatial Distribution of Spontaneous Radiation
Diagnostics Prototyping
Microbunching Measurement
No Intra-Undulator-Segment X-Ray Diagnostics in Baseline Design
Instead: End-of-Undulator X-Ray Diagnostics to Characterize FEL Radiation vs. z
Trajectory Distortion Method
Roll-Away Undulator Segments Function
Investigation of Spontaneous Radiation as Diagnostics Tools
Code Development to Support Commissioning
Areas for Follow-Up R&D
Study of Spectral and Spatial Distribution of Spontaneous Radiation
Diagnostics Prototyping
Microbunching Measurement
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Commissioning PhasesCommissioning Phases
Phase 0: Beam Through Undulator (at 0.2 nC, sngl shot)
Phase I: Spontaneous Radiation (at 0.2 nC, 10 Hz)
Parameters: Energy 4.31-13.64 GeV, Emittance: not critical
Goals: Establish straight and stable trajectory, measure spontaneous radiation
Phase II a: Low Energy FEL Radiation (at 0.2-1 nC, 10 Hz)
Parameters: Energy: 4.31 GeV, Emittance: < 4 micronsPeak Current : < 1 kA
Goals: Characterize FEL radiation. Achieve saturation.
Phase II b: High Energy FEL Radiation (at 0.2-1 nC, 10 Hz)
Parameters: Energy: >4.31 -13.64 GeV, Emittance: 1.2- 4 micronsPeak Current : 1-3.4 kA
Goals: Characterize FEL radiation, gain. Achieve saturation.
Phase III: Transition to Operation (at 0.2-1 nC, 120 Hz)
Parameters: Energy: >4.45 -13.64 GeV, Emittance: 1.2- 4 micronsPeak Current : 1-3.4 kA
Goals: Bring FEL performance up to full operating performance levels.
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
LTU / Undulator Commissioning IssuesLTU / Undulator Commissioning Issues
Undulator Radiation Protection
Collimators
Tune-Up Dump
Roll-Away Undulators
Radiation Interlocks
Measurements of FEL Radiation vs. Z
Radiation Power Damage to Inter Undulator X-Ray Diagnostics
End-of-Undulator Diagnostics
Beam Based Detection of Gain Reducing Errors
Using Spontaneous Radiation
Using FEL Gain Curve
Numerical Simulation Support for Detector Development and Commissioning
Undulator Radiation Protection
Collimators
Tune-Up Dump
Roll-Away Undulators
Radiation Interlocks
Measurements of FEL Radiation vs. Z
Radiation Power Damage to Inter Undulator X-Ray Diagnostics
End-of-Undulator Diagnostics
Beam Based Detection of Gain Reducing Errors
Using Spontaneous Radiation
Using FEL Gain Curve
Numerical Simulation Support for Detector Development and Commissioning
See next talk by Sven Reiche !See next talk by Sven Reiche !
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
/2/2 /2/2
xx11 xx22 xx33
phase-1phase-1 phase-2phase-2 phase-1 phase-1 againagain
halohalo
ee beam beam
3 mm mm
2 mm2 mm
Two-Phase, Two-Plane Collimation, 1½ TimesTwo-Phase, Two-Plane Collimation, 1½ Times
undulator undulator beam beam pipepipe
2.5 mm5 mmedge edge scatteringscattering
(also collimation in (also collimation in yy and energy – see next slides) and energy – see next slides)
Undulator Radiation ProtectionUndulator Radiation Protection
Courtesy of Paul EmmaCourtesy of Paul Emma
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
EE11 EE
22
xx11yy11 xx22
yy22xx33yy33
LCLS Collimation Proposal (2 energy, 3 LCLS Collimation Proposal (2 energy, 3 xx, and 3 , and 3 yy adjustable collimators) adjustable collimators)muon muon
shieldingshielding
undulatorundulator
xx33 & & yy33
optional?optional?
Courtesy of Paul EmmaCourtesy of Paul Emma
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
22ndnd-order -order tracking with all tracking with all collimators collimators closed and big closed and big halohalo
2.5 mm2.5 mm
2-phase, 2-plane, and energy collimation in 22-phase, 2-plane, and energy collimation in 2ndnd-order-order
well well shadowed in shadowed in xx, , yy, and , and EE
?-CY3
-?CX32.0-CY2
-2.0CX22.0-CY1
-2.0CX1-5.0CE2
-5.0CE1
ymm
xmmColl.
xx,,yy = 4000 = 4000 m,m,
EE//EE = 10% (uniform) = 10% (uniform)
Courtesy of Paul Emma
Courtesy of Paul Emma
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
GG = 110 T/m = 110 T/mTrack 100 times with:Track 100 times with:
DL2 BPM rms res. = 10 DL2 BPM rms res. = 10 mmDL2 BPM rms misa. = 200 DL2 BPM rms misa. = 200 mmDL2 Quad rms misa. = 200 DL2 Quad rms misa. = 200 mmUndulator Quad rms misa. = 100 Undulator Quad rms misa. = 100 mm
Correct und-launch, then open stopper-2 for one beam shot…Correct und-launch, then open stopper-2 for one beam shot…
Just Just 11 of 10011 of 100 trajectories exceed trajectories exceed 2.5 mm within undulator2.5 mm within undulatorNoneNone exceed exceed 3.5 mm3.5 mm
First beam shot First beam shot through undulator?through undulator?
Courtesy of Paul Emma
Courtesy of Paul Emma
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Desirable measurements as function of position along undulator :
Intensity (LG, Saturation)
Spectral Distribution
Bunching
Total energy
Pulse length
Photon energy spectra
Spatial coherence
Spatial shape and centroid
Divergence
Desirable measurements as function of position along undulator :
Intensity (LG, Saturation)
Spectral Distribution
Bunching
Total energy
Pulse length
Photon energy spectra
Spatial coherence
Spatial shape and centroid
Divergence
FEL Gain MeasurementFEL Gain Measurement
Undulator RegimeUndulator Regime
Exponential Gain Regime
Exponential Gain Regime
Saturation
Saturation
1 % of X-Ray Pulse1 % of X-Ray Pulse
Electron BunchMicro-Bunching
Electron BunchMicro-Bunching
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Quantities to be MeasuredQuantities to be Measured
Total energy
Pulse length
Photon energy spectra
Spatial coherence
Spatial shape and centroid
Divergence
Total energy
Pulse length
Photon energy spectra
Spatial coherence
Spatial shape and centroid
Divergence
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Dose / Power ConsiderationsDose / Power Considerations
0.01
0.1
1
10
100
100 1000 10000
Photon energy (eV)
Flu
en
ce (
J/cm
^2
)
undulatorexitexperimentalhall A
experimentalhall B
C
Si
W
Au
Be
0.01
0.1
1
10
0.1 1 10 100
grazing angle (degrees)
energ
y d
ensit
y c
orr
ect
ion
0.8 keV critical angle
0.8 keV
8 keV critical angle
8 keV
with electroncorrection
no electroncorrection
Fluence to Melt
Energy Density Reduction of a
Reflector
Be will melt at normal incidence at E < 3 KeV near undulator exit.
Using Be as a grazing incidence reflector may gain x 10 in tolerance.
Courtesy of Richard BiontaCourtesy of Richard Bionta
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Measurement of SASE Gain along the undulatorMeasurement of SASE Gain along the undulator
Direct: Detectors in the Breaks between Undulator Segments. Fluence levels too large for x-ray!.
Alternative: End-Of-Undulator DiagnosticsTurn-Off Gain at Selectable Point Along Undulator by
Introduction of trajectory distortion
Removal of undulator segments (New roll-away option)
Characterize x-ray beam at single station down stream of undulator
Direct: Detectors in the Breaks between Undulator Segments. Fluence levels too large for x-ray!.
Alternative: End-Of-Undulator DiagnosticsTurn-Off Gain at Selectable Point Along Undulator by
Introduction of trajectory distortion
Removal of undulator segments (New roll-away option)
Characterize x-ray beam at single station down stream of undulator
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Fastclosevalve
Slit A
PPS
13'Muonshield
Gas Attenuator
SolidAttenuator
Slit B
PPS
4'Muonshield
WindowlessIonChamber
Direct ImagerIndirect Imager
Spectrometer,Total Energy
PPS
AccessShaft
AccessShaft
Courtesy of Richard BiontaCourtesy of Richard Bionta
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Measurement of SASE Gain withMeasurement of SASE Gain withTrajectory DistortionTrajectory Distortion
GENESIS Simulations by Z. Huang
Quadrupole Displacement at Selectable Point along Undulator
Quadrupole Displacement at Selectable Point along Undulator
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Measurement of SASE Gain Using Rollaway OptionMeasurement of SASE Gain Using Rollaway Option
Undulator Segments can be removed by remote control from the end of the undulator. They will not effect radiation produced by earlier segments.
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Spontaneous vs. FEL RadiationSpontaneous vs. FEL Radiation -1-
Figure by S. Reiche
See Thursday talk by Paul Emma
Weak FEL Signal Detection Using a Slowly Modulated Laser-Heater
See Thursday talk by Paul Emma
Weak FEL Signal Detection Using a Slowly Modulated Laser-Heater
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
Spontaneous vs. FEL RadiationSpontaneous vs. FEL Radiation -2-
Figure by S. Reiche
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
ConclusionsConclusions
Several Undulator Parameters have been Changed.New K Adjustment and Roll-Away Option will aid undulator and FEL commissioning.FEL and Spontaneous Radiation Diagnostics will be located after the end of the undulatorDetailed commissioning strategy is being developed. First Startup Test Plan exists.
PRD 1.1-002 LCLS Start-Up Test Plan (http://www-ssrl.slac.stanford.edu/lcls/prd/1.41002-r1.pdf)
Several Undulator Parameters have been Changed.New K Adjustment and Roll-Away Option will aid undulator and FEL commissioning.FEL and Spontaneous Radiation Diagnostics will be located after the end of the undulatorDetailed commissioning strategy is being developed. First Startup Test Plan exists.
PRD 1.1-002 LCLS Start-Up Test Plan (http://www-ssrl.slac.stanford.edu/lcls/prd/1.41002-r1.pdf)
Undulator Commissioning September 22, 2004 Heinz-Dieter Nuhn, SLAC / SSRLLCLS Commissioning Workshop [email protected]@slac.stanford.edu
End of Presentation