introduction heinz-dieter nuhn, slac / lcls november 14, 2005
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Introduction Heinz-Dieter Nuhn, SLAC / LCLS November 14, 2005. Need for Beam Based Undulator K Measurements Review of Beam Based K Measurement Discussions LCLS Undulator Diagnostics Baseline Components LCLS FEL Commissioning Milestones Workshop Objective and Agenda Charge to the Workshop. - PowerPoint PPT PresentationTRANSCRIPT
1Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
IntroductionHeinz-Dieter Nuhn, SLAC / LCLS
November 14, 2005
IntroductionHeinz-Dieter Nuhn, SLAC / LCLS
November 14, 2005
Need for Beam Based Undulator K Measurements
Review of Beam Based K Measurement Discussions
LCLS Undulator Diagnostics Baseline Components
LCLS FEL Commissioning Milestones
Workshop Objective and Agenda
Charge to the Workshop
Need for Beam Based Undulator K Measurements
Review of Beam Based K Measurement Discussions
LCLS Undulator Diagnostics Baseline Components
LCLS FEL Commissioning Milestones
Workshop Objective and Agenda
Charge to the Workshop
2Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Linac Coherent Light Source
Near Hall
Far Hall
Undulator
3Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
4Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Undulator Type planar hybridMagnet Material NdFeBWiggle Plane horizontalGap 6.8 mmPeriod Length 30.0 ± 0.05 mmEffective On-Axis Field 1.249 TStandard Effective K 3.500 ± 0.015%Range of Effective Undulator Parameter K 3.500 - 3.493 (3.480)Accumulated Segment Phase Error Tolerance 10 degrees
(at any point along segment)
Module Length 3.40 mNumber of Modules 33Undulator Magnet Length 112.2 m
Standard Break Lengths 48.2 - 48.2 - 94.9 cmNominal Total Device Length 130.954 m
Quadrupole Magnet Technology EMQNominal Quadrupole Magnet Length 7 cmIntegrated Quadrupole Gradient 3.0 T
Undulator Type planar hybridMagnet Material NdFeBWiggle Plane horizontalGap 6.8 mmPeriod Length 30.0 ± 0.05 mmEffective On-Axis Field 1.249 TStandard Effective K 3.500 ± 0.015%Range of Effective Undulator Parameter K 3.500 - 3.493 (3.480)Accumulated Segment Phase Error Tolerance 10 degrees
(at any point along segment)
Module Length 3.40 mNumber of Modules 33Undulator Magnet Length 112.2 m
Standard Break Lengths 48.2 - 48.2 - 94.9 cmNominal Total Device Length 130.954 m
Quadrupole Magnet Technology EMQNominal Quadrupole Magnet Length 7 cmIntegrated Quadrupole Gradient 3.0 T
Summary of Nominal Undulator Parameters
5Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Undulator Segment PrototypeUndulator Segment Prototype
6Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Undulator Pole Canting
• Canting comes from wedged spacers
• 4.5 mrad cant angle• 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
7Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Using Undulator Roll-Away and K Adjustment Function
Neutral; K=3.5000; x=+0.0 mm
SpontTp; K=3.4929; x=+3.0 mm RollAway; K=0.0000; x=+100 mm
PowerTp; K=3.4804; x=+8.5 mm
Horizontal position of undulator segment can be remotely controlled correct Keff on beam axis
This adjustment range goes from fraction of a percent to a complete field turn-off.
Horizontal position of undulator segment can be remotely controlled correct Keff on beam axis
This adjustment range goes from fraction of a percent to a complete field turn-off.
Beam AxisBeam Axis
8Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Measurement of Spontaneous Radiation Using RolloutMeasurement of Spontaneous Radiation Using Rollout
Undulator Segments can be removed by remote control from the end of the undulator. They will not effect radiation produced by earlier segments.
9Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Effects Influencing Keff
Undulator Segment Tuning
Undulator Temperature
Transverse Segment Position
Segment Fiducialization and Alignment
Electron Beam Trajectory
Environmental Field in Undulator Hall
Radiation Damage
Effects Influencing Keff
Undulator Segment Tuning
Undulator Temperature
Transverse Segment Position
Segment Fiducialization and Alignment
Electron Beam Trajectory
Environmental Field in Undulator Hall
Radiation Damage
Insufficient Knowledge of Actual K Seen by Electrons N
eed fo
r Beam
Based
Un
du
lator K
Measu
remen
ts
See Tolerance Budget on next Slide
10Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Segment Detuning Sub-Budget
MMF K KK K T x
2
2
ii i
KK p
p
Parameter pi Typical Value rms dev. pi Note
KMMF 3.5 0.0003 ±0.015 % uniform
K -0.0019 °C-1 0.0001 °C-1 Thermal Coefficient
T 0 °C 0.32 °C ±0.56 °C uniform without compensation
K 0.0023 mm-1 0.00004 mm-1 Canting Coefficient
x 1.5 mm 0.05 mm Horizontal Positioning
2 2 2 2 2
MMF K K K KK K T T x x
/ 0.020%K K
11Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
January 2004 Z. Huang
Sven Reiche
September 2004: LCLS Diagnostics and Commissioning WorkshopHigh-Resolution Effective K Measurements Using Spontaneous Undulator Radiation , Bingxin Yang http://www-ssrl.slac.stanford.edu/lcls/workshops/2004-09-22_diag_comm/bxyang_CommWorkshop200409.ppt
October 2004: LCLS WeekUndulator / FEL Diagnostics, Bingxin Yang https://www-ssrl.slac.stanford.edu/lcls/fac/talks_oct2004/Yang_FAC200410.ppt
January 2005: LCLS FEL Physics MeetingSimulation Results for 200-pC ("chargito") SASE performance with AC Wake, Jim Welch http://www-ssrl.slac.stanford.edu/lcls/internals/felphysics/2005-01-18/k_meas_talk.ppt
April 2005 ICFA Commissioning Workshop at Zeuthen (Work Package 6)Measurement of Undulator Segment K_effective using Spontaneous Radiation in the Near Hall of the LCLS, Jim Welch http://adweb.desy.de/mpy/ICFA2005_Commissioning/Talks(PDF)/April%2021%20(Thursday)/WP6_1/Welch_Undulator%20Commissioning.pdf
High resolution undulator measurements using angle-integrated spontaneous spectra, Bingxin Yang http://adweb.desy.de/mpy/ICFA2005_Commissioning/Talks(PDF)/April%2021%20(Thursday)/WP6_2/Yang_High%20Resolution%20Undulator%20measurements.pdf
July 2005 LCLS Week:K-Measurement Strategies discussion presented by Jim Welch and Bingxin Yang
October 2005 FAC MeetingX-Ray Diagnostic, Richard Bionta http://ssrl.slac.stanford.edu/lcls/fac/talks_oct_2005/bionta_xtod_diagnostics_fac.ppt
January 2004 Z. Huang
Sven Reiche
September 2004: LCLS Diagnostics and Commissioning WorkshopHigh-Resolution Effective K Measurements Using Spontaneous Undulator Radiation , Bingxin Yang http://www-ssrl.slac.stanford.edu/lcls/workshops/2004-09-22_diag_comm/bxyang_CommWorkshop200409.ppt
October 2004: LCLS WeekUndulator / FEL Diagnostics, Bingxin Yang https://www-ssrl.slac.stanford.edu/lcls/fac/talks_oct2004/Yang_FAC200410.ppt
January 2005: LCLS FEL Physics MeetingSimulation Results for 200-pC ("chargito") SASE performance with AC Wake, Jim Welch http://www-ssrl.slac.stanford.edu/lcls/internals/felphysics/2005-01-18/k_meas_talk.ppt
April 2005 ICFA Commissioning Workshop at Zeuthen (Work Package 6)Measurement of Undulator Segment K_effective using Spontaneous Radiation in the Near Hall of the LCLS, Jim Welch http://adweb.desy.de/mpy/ICFA2005_Commissioning/Talks(PDF)/April%2021%20(Thursday)/WP6_1/Welch_Undulator%20Commissioning.pdf
High resolution undulator measurements using angle-integrated spontaneous spectra, Bingxin Yang http://adweb.desy.de/mpy/ICFA2005_Commissioning/Talks(PDF)/April%2021%20(Thursday)/WP6_2/Yang_High%20Resolution%20Undulator%20measurements.pdf
July 2005 LCLS Week:K-Measurement Strategies discussion presented by Jim Welch and Bingxin Yang
October 2005 FAC MeetingX-Ray Diagnostic, Richard Bionta http://ssrl.slac.stanford.edu/lcls/fac/talks_oct_2005/bionta_xtod_diagnostics_fac.ppt
Discussions of Beam Based K Measurements Based on Spontaneous Undulator Radiation
12Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Diagnostics presently being developed to Characterize Electron Beam and X-Ray Properties include
Electron Beam Diagnostics in the Linac-To-Undulator (LTU) Beamline
Electron Beam and X-Ray Diagnostics in the Undulator
Electron Beam Diagnostics after the Undulator (Dump Line)
X-Ray Diagnostics in the Front End Enclosure (FEE)
Diagnostics presently being developed to Characterize Electron Beam and X-Ray Properties include
Electron Beam Diagnostics in the Linac-To-Undulator (LTU) Beamline
Electron Beam and X-Ray Diagnostics in the Undulator
Electron Beam Diagnostics after the Undulator (Dump Line)
X-Ray Diagnostics in the Front End Enclosure (FEE)
Review of Existing LCLS Baseline Diagnostics
13Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Control of Electron Beam Properties before Entrance into the UndulatorControl of Electron Beam Properties before Entrance into the Undulator
LTU Electron Beam Diagnostics
14Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
4 wires 4 wires , , , , (+ collimators)(+ collimators)
1 OTR 1 OTR slice- slice-, , , , abort dumpabort dump
OTR OTR slice E-spread (0.02%) slice E-spread (0.02%)
xx11 xx22
2 BPMs 2 BPMs energy jitterenergy jitter
relative energy relative energy centroid resolution: centroid resolution:
0.003%0.003% (5- (5-m BPMs)m BPMs)
LTULTU
Courtesy of Paul EmmaCourtesy of Paul Emma
15Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Control of Electron Beam Trajectory inside the UndulatorControl of Electron Beam Trajectory inside the Undulator
X-Ray Beam Diagnostics
16Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Short Break Section Components
Courtesy of Dean WaltersCourtesy of Dean Walters
QuadrupoleQuadrupole
Undulator SegmentUndulator Segment
Cherenkov DetectorCherenkov Detector
Undulator SegmentUndulator Segment
RF Cavity BPMRF Cavity BPM
Beam Finder WireBeam Finder Wire
17Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Long Break Section Components
QuadrupoleQuadrupole
Undulator SegmentUndulator Segment
Cherenkov DetectorCherenkov Detector
Undulator SegmentUndulator Segment
Diagnostics TankDiagnostics Tank
Beam Finder WireBeam Finder Wire
RF Cavity BPMRF Cavity BPM
Courtesy of Dean WaltersCourtesy of Dean Walters
18Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Electron Beam Diagnostics after UndulatorElectron Beam Diagnostics after Undulator
After Undulator Electron Beam Diagnostics
19Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
1 OTR 1 OTR energy-spread (0.001%) energy-spread (0.001%)
1 BPM 1 BPM energy-jitter (0.003%) energy-jitter (0.003%)
Dump-LineDump-Line
Courtesy of Paul EmmaCourtesy of Paul Emma
20Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Measurement of X-Ray Beam Properties in FEEMeasurement of X-Ray Beam Properties in FEE
Diagnostics in the Front End Enclosure
21Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
FEE Layout
Fastclosevalve
Slit
Ion Chamber
Ion Chamber
Diagnostics Package
Gas Attenuator
SolidAttenuator
SiC Mirror 1
Be Mirrors 2 & 3
SiC Mirror 2
Collimator 1
DiagnosticsPackage
Courtesy of Richard BiontaCourtesy of Richard Bionta
22Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Desired Spontaneous Measurements
f(x,y,1) Spatial distribution around 1
1 1st harmonic Photon wavelength
1st harmonic wavelength spread
Beam direction
u Total energy / pulse
u,1 Temporal variation in beam parameters
,x y
Courtesy of Richard BiontaCourtesy of Richard Bionta
23Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
FEE Cartoon
SolidAttenuator
Gas Attenuator
High-EnergySlit
Start of Experimental
Hutches
5 mm diameter
collimators
Muon Shield
FEL Offset mirror
system
TotalEnergy
CalorimeterWFOV Direct
Imager
Spectrometer / Indirect Imager mirror
Windowless Ion
Chamber
Windowless Ion
Chamber
e-
Diagnostic Package
Spectrometer camera
Courtesy of Richard BiontaCourtesy of Richard Bionta
24Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Redundant Commissioning Instrumentation
Instrument Purpose Adjustment Calibration and Physics risks
Direct Imager SP f(x,y), look for FEL, measure FEL u, f(x,y), x,y
ND filter, Attenuators
Scintillator linearity, Attenuator linearity and background
Indirect Imager Measure FEL u, f(x,y), spectral imaging of SP and FEL harmonics, attenuator calibration
Mirror Angle Mirror reflectivity, damage
Total Energy FEL u Attenuators Energy to Heat, damage
Ion Chamber FEL u, x,y,x',y' Pressure Signal strength
Spectrometers FEL, SP spectra Attenuators Resolution, damage
Courtesy of Richard BiontaCourtesy of Richard Bionta
25Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
MS3BO_040: Front End Beneficial Occupancy (9/5/2007)
MS3BO_030: Undulator Facility Beneficial Occupancy (12/3/2007)
MS3_XT040: Solid Attenuator Installation Complete (12/14/2007)
MS3_XT045: Gas Attenuator Installation Complete (12/14/2007)
MS3_XT080: Start Front End Enclosure Commissioning (3/4/2008)
MS3_LN015: Start Linac-to-Undulator (LTU) Commissioning (5/12/2008)
MS3_XT066: Start Near Experimental Hall Checkout (6/12/2008)
MS3_UN020: Undulator System Installation Complete (7/18/2008)
MS3_UN025: Start Undulator Commissioning (1st Light) (7/24/2008)
MS3BO_040: Front End Beneficial Occupancy (9/5/2007)
MS3BO_030: Undulator Facility Beneficial Occupancy (12/3/2007)
MS3_XT040: Solid Attenuator Installation Complete (12/14/2007)
MS3_XT045: Gas Attenuator Installation Complete (12/14/2007)
MS3_XT080: Start Front End Enclosure Commissioning (3/4/2008)
MS3_LN015: Start Linac-to-Undulator (LTU) Commissioning (5/12/2008)
MS3_XT066: Start Near Experimental Hall Checkout (6/12/2008)
MS3_UN020: Undulator System Installation Complete (7/18/2008)
MS3_UN025: Start Undulator Commissioning (1st Light) (7/24/2008)
LCLS FEL Commissioning Milestones
Diagnostics needed around July 2008Diagnostics needed around July 2008
26Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Define a strategy for using spontaneous undulator radiation to measure the K value of every individual LCLS Undulator Segment after installation in the Undulator Hall.
To reach the objective, the physics and technologies necessary need to be identified. Workshop discussions will include
Usable spectral features of spontaneous radiation
Strategies for beam-based K measurements
Specifications for suitable instruments
Scheduling issues
Three Work Packages have been defined and assigned to three different groups. Work described by these Work Packages has been carried out in preparation of the workshop and will be presented and discussed at the workshop.
Define a strategy for using spontaneous undulator radiation to measure the K value of every individual LCLS Undulator Segment after installation in the Undulator Hall.
To reach the objective, the physics and technologies necessary need to be identified. Workshop discussions will include
Usable spectral features of spontaneous radiation
Strategies for beam-based K measurements
Specifications for suitable instruments
Scheduling issues
Three Work Packages have been defined and assigned to three different groups. Work described by these Work Packages has been carried out in preparation of the workshop and will be presented and discussed at the workshop.
Workshop Objective
27Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Workshop Agenda
28Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Group: B. Yang, R. Dejus
Task: Examine robustness of angle-integrated measurements of undulator spectrum. Consider effects of errors in beam alignment, undulator magnet structure, straightness of vacuum pipe, alignment of spectrometer, etc. Consider effects of location of undulator segment being tested. Determine what are realistic values for the precision with which the value of K can be determined for an undulator segment at the beginning, middle, and end of the undulator.
This task explores the use of the high-energy edge of the fundamental spectral peak (the third harmonic may also be considered) of a single undulator to measure its K parameter. The measuring spectrometer will be located in the LCLS FEE, roughly 100 m downstream from the final undulator segment. Realistic values for the angular acceptance of the measurement (limited by beam-pipe apertures, or apertures at the measuring point) should be considered.
Group: B. Yang, R. Dejus
Task: Examine robustness of angle-integrated measurements of undulator spectrum. Consider effects of errors in beam alignment, undulator magnet structure, straightness of vacuum pipe, alignment of spectrometer, etc. Consider effects of location of undulator segment being tested. Determine what are realistic values for the precision with which the value of K can be determined for an undulator segment at the beginning, middle, and end of the undulator.
This task explores the use of the high-energy edge of the fundamental spectral peak (the third harmonic may also be considered) of a single undulator to measure its K parameter. The measuring spectrometer will be located in the LCLS FEE, roughly 100 m downstream from the final undulator segment. Realistic values for the angular acceptance of the measurement (limited by beam-pipe apertures, or apertures at the measuring point) should be considered.
Work Package 1: Angle Integrated Measurement
29Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Group: J. Welch, R. Bionta, S. Reiche
Task: Examine robustness of pinhole measurements of undulator spectrum. Consider effects of errors in beam alignment, undulator magnet structure, straightness of vacuum pipe, alignment of pinhole and spectrometer, etc. Consider effects of location of undulator segment being tested. Determine what are realistic values for the precision with which the value of K can be determined for an undulator segment at the beginning, middle, and end of the undulator.
This task explores the use of the fundamental spectral peak (the third harmonic may also be considered) of a single undulator, as seen through a small angular aperture, to measure its K parameter. The measuring spectrometer will be located in the LCLS FEE, roughly 100 m downstream from the final undulator segment. Realistic values for the angular acceptance of the measurement should be determined, and the effects of misalignment of the aperture or undulator axis should be carefully considered.
Group: J. Welch, R. Bionta, S. Reiche
Task: Examine robustness of pinhole measurements of undulator spectrum. Consider effects of errors in beam alignment, undulator magnet structure, straightness of vacuum pipe, alignment of pinhole and spectrometer, etc. Consider effects of location of undulator segment being tested. Determine what are realistic values for the precision with which the value of K can be determined for an undulator segment at the beginning, middle, and end of the undulator.
This task explores the use of the fundamental spectral peak (the third harmonic may also be considered) of a single undulator, as seen through a small angular aperture, to measure its K parameter. The measuring spectrometer will be located in the LCLS FEE, roughly 100 m downstream from the final undulator segment. Realistic values for the angular acceptance of the measurement should be determined, and the effects of misalignment of the aperture or undulator axis should be carefully considered.
Work Package 2: Pinhole Measurement
30Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Group: J. Hastings, et al.
Task: Assume that a single shot spectral measurement is needed for an LCLS spontaneous undulator pulse. What are the best options for doing the measurement? What spectral resolution can be obtained using these methods? What are the effects of beam jitter, spectrometer misalignment, etc?
This task explores the design and performance of x-ray spectrometers capable of providing centroid or edge position with high resolution, on a single-shot of radiation from a single LCLS undulator. The spectrometer will most likely be located in the LCLS FEE, about 100 m downstream from the final undulator segment.
Group: J. Hastings, et al.
Task: Assume that a single shot spectral measurement is needed for an LCLS spontaneous undulator pulse. What are the best options for doing the measurement? What spectral resolution can be obtained using these methods? What are the effects of beam jitter, spectrometer misalignment, etc?
This task explores the design and performance of x-ray spectrometers capable of providing centroid or edge position with high resolution, on a single-shot of radiation from a single LCLS undulator. The spectrometer will most likely be located in the LCLS FEE, about 100 m downstream from the final undulator segment.
Work Package 3: Single-Shot Spectral Measurement
31Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
Characterize the spectral features of spontaneous synchrotron radiation that are usable for beam-based K-measurements.
Identify the most appropriate strategy for beam-based K-measurements.
Specify suitable instruments for the identified beam-based K-measurement strategy.
List expected performance parameters such as resolution of K measurement as function of beam charge, and segment location as well as expected tolerances to trajectory and energy jitter.
List any open questions regarding the feasibility of the most appropriate strategy.
List the R&D activities, if any, needed before the design of a measurement system can be completed and manufacturing/procurement can start.
Characterize the spectral features of spontaneous synchrotron radiation that are usable for beam-based K-measurements.
Identify the most appropriate strategy for beam-based K-measurements.
Specify suitable instruments for the identified beam-based K-measurement strategy.
List expected performance parameters such as resolution of K measurement as function of beam charge, and segment location as well as expected tolerances to trajectory and energy jitter.
List any open questions regarding the feasibility of the most appropriate strategy.
List the R&D activities, if any, needed before the design of a measurement system can be completed and manufacturing/procurement can start.
Workshop Charge
32Introduction – November 14, 2005 Heinz-Dieter Nuhn, SLAC / LCLSBeam Based Undulator Measurements Workshop [email protected]
End of Presentation