Workshop Issues [email protected] Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center Diagnostics

Diagnostics and Comm. Wrkshp, January 19-20, 2004Diagnostics and Comm. Wrkshp, January 19-20, 2004 Heinz-Dieter Nuhn, SLAC / SSRLHeinz-Dieter Nuhn, SLAC / SSRL

Workshop IssuesWorkshop Issues [email protected]@slac.stanford.edu

Linac Coherent Light Source Stanford Synchrotron Radiation LaboratoryStanford Linear Accelerator Center

Workshop IssuesHeinz-Dieter Nuhn, SLAC / SSRL

January 19, 2004

Workshop IssuesHeinz-Dieter Nuhn, SLAC / SSRL

January 19, 2004

Workshop OverviewWorkshop Overview Discussion of the Commissioning DocumentDiscussion of the Commissioning Document

Workshop OverviewWorkshop Overview Discussion of the Commissioning DocumentDiscussion of the Commissioning Document




IntroductionIntroductionIntroductionIntroduction

Undulator commissioning has been discussed over the last Undulator commissioning has been discussed over the last several yearsseveral years

Many unsolved questions remainMany unsolved questions remain

Main challenges areMain challenges are

Radiation protection of magnetic material during commissioning Radiation protection of magnetic material during commissioning and operationand operation

Development of detectors that can withstand the heat loadDevelopment of detectors that can withstand the heat load

Compilation of descriptions of detector types available for Compilation of descriptions of detector types available for commissioning (both existing and under development)commissioning (both existing and under development)

Electron detectors upstream of the undulatorsElectron detectors upstream of the undulators

Electron and x-ray detectors along the undulatorElectron and x-ray detectors along the undulator

Electron and x-ray detectors after the undulator Electron and x-ray detectors after the undulator

Decision on how to measure the FEL gain curveDecision on how to measure the FEL gain curve

Simulation supportSimulation support: Enhancement of existing codes to Include : Enhancement of existing codes to Include simulation of X-ray diagnostics simulation of X-ray diagnostics

Undulator commissioning has been discussed over the last Undulator commissioning has been discussed over the last several yearsseveral years

Many unsolved questions remainMany unsolved questions remain

Main challenges areMain challenges are

Radiation protection of magnetic material during commissioning Radiation protection of magnetic material during commissioning and operationand operation

Development of detectors that can withstand the heat loadDevelopment of detectors that can withstand the heat load

Compilation of descriptions of detector types available for Compilation of descriptions of detector types available for commissioning (both existing and under development)commissioning (both existing and under development)

Electron detectors upstream of the undulatorsElectron detectors upstream of the undulators

Electron and x-ray detectors along the undulatorElectron and x-ray detectors along the undulator

Electron and x-ray detectors after the undulator Electron and x-ray detectors after the undulator

Decision on how to measure the FEL gain curveDecision on how to measure the FEL gain curve

Simulation supportSimulation support: Enhancement of existing codes to Include : Enhancement of existing codes to Include simulation of X-ray diagnostics simulation of X-ray diagnostics




Workshop FocusWorkshop FocusWorkshop FocusWorkshop Focus

Commissioning of the Undulator Line of the LCLS with BeamCommissioning of the Undulator Line of the LCLS with Beam

PrerequisitesPrerequisites Injector and Linac Commissioning CompleteInjector and Linac Commissioning Complete

Undulator, Diagnostics, Shielding, Beam Dump etc. in PlaceUndulator, Diagnostics, Shielding, Beam Dump etc. in Place

Commissioning Without Beam for all Components CompleteCommissioning Without Beam for all Components Complete

Main Commissioning TasksMain Commissioning Tasks

Characterization of Electron Beam Up-Stream of UndulatorCharacterization of Electron Beam Up-Stream of Undulator

Establishment of a Good Beam Trajectory Through Undulator to Establishment of a Good Beam Trajectory Through Undulator to Beam-DumpBeam-Dump

Characterization of Spontaneous RadiationCharacterization of Spontaneous Radiation

Establishment of SASE GainEstablishment of SASE Gain

Characterization of FEL RadiationCharacterization of FEL Radiation

Commissioning of the Undulator Line of the LCLS with BeamCommissioning of the Undulator Line of the LCLS with Beam

PrerequisitesPrerequisites Injector and Linac Commissioning CompleteInjector and Linac Commissioning Complete

Undulator, Diagnostics, Shielding, Beam Dump etc. in PlaceUndulator, Diagnostics, Shielding, Beam Dump etc. in Place

Commissioning Without Beam for all Components CompleteCommissioning Without Beam for all Components Complete

Main Commissioning TasksMain Commissioning Tasks

Characterization of Electron Beam Up-Stream of UndulatorCharacterization of Electron Beam Up-Stream of Undulator

Establishment of a Good Beam Trajectory Through Undulator to Establishment of a Good Beam Trajectory Through Undulator to Beam-DumpBeam-Dump

Characterization of Spontaneous RadiationCharacterization of Spontaneous Radiation

Establishment of SASE GainEstablishment of SASE Gain

Characterization of FEL RadiationCharacterization of FEL Radiation




GoalsGoalsGoalsGoals

End-Of-Construction GoalEnd-Of-Construction Goal Required by DOE to close-off construction project (CD-4)Required by DOE to close-off construction project (CD-4)

Needs to be simple to avoid project time and cost overrunNeeds to be simple to avoid project time and cost overrun

Commissioning GoalCommissioning Goal Make LCLS ready for operationMake LCLS ready for operation

End-Of-Construction GoalEnd-Of-Construction Goal Required by DOE to close-off construction project (CD-4)Required by DOE to close-off construction project (CD-4)

Needs to be simple to avoid project time and cost overrunNeeds to be simple to avoid project time and cost overrun

Commissioning GoalCommissioning Goal Make LCLS ready for operationMake LCLS ready for operation




Workshop PresentationsWorkshop PresentationsWorkshop PresentationsWorkshop Presentations

Charge – J. GalaydaCharge – J. Galayda

Welcome – C. PellegriniWelcome – C. Pellegrini

Workshop Issues – H.-D. NuhnWorkshop Issues – H.-D. Nuhn

Status of Electron Beam Diagnostics – P. KrejcikStatus of Electron Beam Diagnostics – P. Krejcik

Status of X-Ray Beam Diagnostics along the Undulator – S. Status of X-Ray Beam Diagnostics along the Undulator – S. MiltonMilton

X-Ray Diagnostics after the Undulator – R. BiontaX-Ray Diagnostics after the Undulator – R. Bionta

Electron Beam Control and Alignment – P. EmmaElectron Beam Control and Alignment – P. Emma

Planning of FEL Simulations in Support of Commissioning Planning of FEL Simulations in Support of Commissioning Commissioning Simulations using GENESIS 1.3 – S. ReicheCommissioning Simulations using GENESIS 1.3 – S. Reiche

Commissioning Simulations using GINGER – W.M. FawleyCommissioning Simulations using GINGER – W.M. Fawley

Summary and Final Discussion – J. GalaydaSummary and Final Discussion – J. Galayda

Charge – J. GalaydaCharge – J. Galayda

Welcome – C. PellegriniWelcome – C. Pellegrini

Workshop Issues – H.-D. NuhnWorkshop Issues – H.-D. Nuhn

Status of Electron Beam Diagnostics – P. KrejcikStatus of Electron Beam Diagnostics – P. Krejcik

Status of X-Ray Beam Diagnostics along the Undulator – S. Status of X-Ray Beam Diagnostics along the Undulator – S. MiltonMilton

X-Ray Diagnostics after the Undulator – R. BiontaX-Ray Diagnostics after the Undulator – R. Bionta

Electron Beam Control and Alignment – P. EmmaElectron Beam Control and Alignment – P. Emma

Planning of FEL Simulations in Support of Commissioning Planning of FEL Simulations in Support of Commissioning Commissioning Simulations using GENESIS 1.3 – S. ReicheCommissioning Simulations using GENESIS 1.3 – S. Reiche

Commissioning Simulations using GINGER – W.M. FawleyCommissioning Simulations using GINGER – W.M. Fawley

Summary and Final Discussion – J. GalaydaSummary and Final Discussion – J. Galayda




Expected Workshop OutcomeExpected Workshop OutcomeExpected Workshop OutcomeExpected Workshop Outcome

Resulting Document:Resulting Document:“Beam Commissioning of the LCLS Undulator System”“Beam Commissioning of the LCLS Undulator System”LCLS Tech NoteLCLS Tech Note

Target Date: Mid February 2004Target Date: Mid February 2004

PurposePurpose

Document Required for next DOE ReviewDocument Required for next DOE Review

Basis for Starting R&D for Commissioning DiagnosticsBasis for Starting R&D for Commissioning Diagnostics

Resulting Document:Resulting Document:“Beam Commissioning of the LCLS Undulator System”“Beam Commissioning of the LCLS Undulator System”LCLS Tech NoteLCLS Tech Note

Target Date: Mid February 2004Target Date: Mid February 2004

PurposePurpose

Document Required for next DOE ReviewDocument Required for next DOE Review

Basis for Starting R&D for Commissioning DiagnosticsBasis for Starting R&D for Commissioning Diagnostics




Draft Workshop DocumentDraft Workshop DocumentDraft Workshop DocumentDraft Workshop Document

TitleTitle: Beam Commissioning the LCLS Undulator Systems: Beam Commissioning the LCLS Undulator Systems

Acting Editor: James WelchActing Editor: James Welch

Authors: R. Bionta, P. Emma, W. Fawley, Z. Huang, Authors: R. Bionta, P. Emma, W. Fawley, Z. Huang, P. Krejcik, S. Milton, H.-D. Nuhn, C. Pellegrini, P. Krejcik, S. Milton, H.-D. Nuhn, C. Pellegrini, S. Reiche, J. Welch, ???S. Reiche, J. Welch, ???

Available at Workshop WEB page.Available at Workshop WEB page.

http://www-ssrl.slac.stanford.edu/lcls/undulator/meetings/2004-http://www-ssrl.slac.stanford.edu/lcls/undulator/meetings/2004-01-19_diagnostics_comissioning/01-19_diagnostics_comissioning/

TitleTitle: Beam Commissioning the LCLS Undulator Systems: Beam Commissioning the LCLS Undulator Systems

Acting Editor: James WelchActing Editor: James Welch

Authors: R. Bionta, P. Emma, W. Fawley, Z. Huang, Authors: R. Bionta, P. Emma, W. Fawley, Z. Huang, P. Krejcik, S. Milton, H.-D. Nuhn, C. Pellegrini, P. Krejcik, S. Milton, H.-D. Nuhn, C. Pellegrini, S. Reiche, J. Welch, ???S. Reiche, J. Welch, ???

Available at Workshop WEB page.Available at Workshop WEB page.

http://www-ssrl.slac.stanford.edu/lcls/undulator/meetings/2004-http://www-ssrl.slac.stanford.edu/lcls/undulator/meetings/2004-01-19_diagnostics_comissioning/01-19_diagnostics_comissioning/

Many Many

Thanks !!!

Thanks !!!

Many Many

Thanks !!!

Thanks !!!




Draft Document: Table of ContentsDraft Document: Table of ContentsDraft Document: Table of ContentsDraft Document: Table of Contents

1. Introduction1. Introduction

2. Goal of Commissioning2. Goal of Commissioning

3. Commissioning Procedure3. Commissioning Procedure

4. Radiation Characteristics4. Radiation Characteristics

5. Diagnostics5. Diagnostics

6. Troubleshooting6. Troubleshooting

A. Details: Electron Beam to DumpA. Details: Electron Beam to Dump

1. Introduction1. Introduction

2. Goal of Commissioning2. Goal of Commissioning

3. Commissioning Procedure3. Commissioning Procedure

4. Radiation Characteristics4. Radiation Characteristics

5. Diagnostics5. Diagnostics

6. Troubleshooting6. Troubleshooting

A. Details: Electron Beam to DumpA. Details: Electron Beam to Dump




Draft Document: 3. Commissioning ProcedureDraft Document: 3. Commissioning ProcedureDraft Document: 3. Commissioning ProcedureDraft Document: 3. Commissioning Procedure

3.1 Pre-Commissioning Status3.1 Pre-Commissioning Status

3.2 Electron Beam to Dump3.2 Electron Beam to Dump

3.3 Beam-Based Alignment (BBA)3.3 Beam-Based Alignment (BBA) 3.3.1 BBA Procedure3.3.1 BBA Procedure

3.3.2 BBA Verification3.3.2 BBA Verification

3.4 Commission FEE Diagnostics3.4 Commission FEE Diagnostics

3.5 FEE Diagnostics Configuration3.5 FEE Diagnostics Configuration

3.6 Commission Undulator Diagnostics3.6 Commission Undulator Diagnostics

3.7 FEL Commissioning at Long Wavelength3.7 FEL Commissioning at Long Wavelength

3.7.1 Trajectory Distortion Method3.7.1 Trajectory Distortion Method

3.7.2 Using Undulator x-ray Diagnostics3.7.2 Using Undulator x-ray Diagnostics

3.7.3 Independently Removable Segments3.7.3 Independently Removable Segments

3.7.4 Variable Gap Undulator3.7.4 Variable Gap Undulator

3.1 Pre-Commissioning Status3.1 Pre-Commissioning Status

3.2 Electron Beam to Dump3.2 Electron Beam to Dump

3.3 Beam-Based Alignment (BBA)3.3 Beam-Based Alignment (BBA) 3.3.1 BBA Procedure3.3.1 BBA Procedure

3.3.2 BBA Verification3.3.2 BBA Verification

3.4 Commission FEE Diagnostics3.4 Commission FEE Diagnostics

3.5 FEE Diagnostics Configuration3.5 FEE Diagnostics Configuration

3.6 Commission Undulator Diagnostics3.6 Commission Undulator Diagnostics

3.7 FEL Commissioning at Long Wavelength3.7 FEL Commissioning at Long Wavelength

3.7.1 Trajectory Distortion Method3.7.1 Trajectory Distortion Method

3.7.2 Using Undulator x-ray Diagnostics3.7.2 Using Undulator x-ray Diagnostics

3.7.3 Independently Removable Segments3.7.3 Independently Removable Segments

3.7.4 Variable Gap Undulator3.7.4 Variable Gap Undulator




Draft Document: 4. Radiation CharacteristicsDraft Document: 4. Radiation CharacteristicsDraft Document: 4. Radiation CharacteristicsDraft Document: 4. Radiation Characteristics

4.1 Along the Undulator4.1 Along the Undulator

4.2 Downstream of the Undulator4.2 Downstream of the Undulator 4.2.1 FEL4.2.1 FEL

4.2.2 Spontaneous4.2.2 Spontaneous

4.1 Along the Undulator4.1 Along the Undulator

4.2 Downstream of the Undulator4.2 Downstream of the Undulator 4.2.1 FEL4.2.1 FEL

4.2.2 Spontaneous4.2.2 Spontaneous




Draft Document: 5. DiagnosticsDraft Document: 5. DiagnosticsDraft Document: 5. DiagnosticsDraft Document: 5. Diagnostics

5.1 Undulator Diagnostics Instrumentation5.1 Undulator Diagnostics Instrumentation

5.2 Downstream X-Ray Diagnostics Intrumentation5.2 Downstream X-Ray Diagnostics Intrumentation

5.2.1 Diagnostics in the FEE5.2.1 Diagnostics in the FEE

5.2.2 Diagnostics in the Commissioning Diagnostics Tank5.2.2 Diagnostics in the Commissioning Diagnostics Tank

5.2.3 Total Energy5.2.3 Total Energy

5.2.4 Pulse Length5.2.4 Pulse Length

5.2.5 Photon Spectrum5.2.5 Photon Spectrum

5.2.6 Transverse Coherence5.2.6 Transverse Coherence

5.2.7 Spatial Shape and Centroid Location5.2.7 Spatial Shape and Centroid Location

5.2.8 Divergence5.2.8 Divergence

5.1 Undulator Diagnostics Instrumentation5.1 Undulator Diagnostics Instrumentation

5.2 Downstream X-Ray Diagnostics Intrumentation5.2 Downstream X-Ray Diagnostics Intrumentation

5.2.1 Diagnostics in the FEE5.2.1 Diagnostics in the FEE

5.2.2 Diagnostics in the Commissioning Diagnostics Tank5.2.2 Diagnostics in the Commissioning Diagnostics Tank

5.2.3 Total Energy5.2.3 Total Energy

5.2.4 Pulse Length5.2.4 Pulse Length

5.2.5 Photon Spectrum5.2.5 Photon Spectrum

5.2.6 Transverse Coherence5.2.6 Transverse Coherence

5.2.7 Spatial Shape and Centroid Location5.2.7 Spatial Shape and Centroid Location

5.2.8 Divergence5.2.8 Divergence




Related Document in PreparationRelated Document in PreparationRelated Document in PreparationRelated Document in Preparation

TitleTitle: Undulator Protection Study: Undulator Protection Study

Authors: E. Bong, P. Emma, P. Krejcik, H.-D. Nuhn, J. Authors: E. Bong, P. Emma, P. Krejcik, H.-D. Nuhn, J. WelchWelch

Expected Completion: Early March 2004Expected Completion: Early March 2004

TitleTitle: Undulator Protection Study: Undulator Protection Study

Authors: E. Bong, P. Emma, P. Krejcik, H.-D. Nuhn, J. Authors: E. Bong, P. Emma, P. Krejcik, H.-D. Nuhn, J. WelchWelch

Expected Completion: Early March 2004Expected Completion: Early March 2004




Desirable measurement s Desirable measurement s as function of position as function of position along undulator :along undulator :

Intensity (LG, Saturation)Intensity (LG, Saturation)

Spectral DistributionSpectral Distribution

BunchingBunching

Alternative measurements Alternative measurements of saturation at undulator of saturation at undulator end:end:

Intensity vs. Peak CurrentIntensity vs. Peak Current

Intensity vs. EmittanceIntensity vs. Emittance

Desirable measurement s Desirable measurement s as function of position as function of position along undulator :along undulator :

Intensity (LG, Saturation)Intensity (LG, Saturation)

Spectral DistributionSpectral Distribution

BunchingBunching

Alternative measurements Alternative measurements of saturation at undulator of saturation at undulator end:end:

Intensity vs. Peak CurrentIntensity vs. Peak Current

Intensity vs. EmittanceIntensity vs. Emittance

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




Measurement of SASE Gain along the undulatorMeasurement of SASE Gain along the undulatorMeasurement of SASE Gain along the undulatorMeasurement of SASE Gain along the undulator

Direct: Put Detectors in the Breaks between Direct: Put Detectors in the Breaks between Undulator Segments. Undulator Segments.

No good solution for x-ray detector in existence, yet.No good solution for x-ray detector in existence, yet.

Alternative: Characterize x-ray beam at single Alternative: Characterize x-ray beam at single station down stream of undulator after gain is turned station down stream of undulator after gain is turned off at a selectable point along undulator by off at a selectable point along undulator by

introduction of orbit distortion. (Initial studies by Z. Huang)introduction of orbit distortion. (Initial studies by Z. Huang)

removal of undulator segments (Changed Design)removal of undulator segments (Changed Design)

opening of gap if undulator is variable gap device. (Changed opening of gap if undulator is variable gap device. (Changed Design)Design)

Direct: Put Detectors in the Breaks between Direct: Put Detectors in the Breaks between Undulator Segments. Undulator Segments.

No good solution for x-ray detector in existence, yet.No good solution for x-ray detector in existence, yet.

Alternative: Characterize x-ray beam at single Alternative: Characterize x-ray beam at single station down stream of undulator after gain is turned station down stream of undulator after gain is turned off at a selectable point along undulator by off at a selectable point along undulator by

introduction of orbit distortion. (Initial studies by Z. Huang)introduction of orbit distortion. (Initial studies by Z. Huang)

removal of undulator segments (Changed Design)removal of undulator segments (Changed Design)

opening of gap if undulator is variable gap device. (Changed opening of gap if undulator is variable gap device. (Changed Design)Design)




Gain Measurement Scenarios (Reichanadter)Gain Measurement Scenarios (Reichanadter)Gain Measurement Scenarios (Reichanadter)Gain Measurement Scenarios (Reichanadter)

Full Diagnostics Between UndulatorsFull Diagnostics Between UndulatorsPlusses: Allows Commissioning with all undulators in placePlusses: Allows Commissioning with all undulators in place

Minuses: Does not Address Radiation Damage Issues. Most Expensive Option in Terms Minuses: Does not Address Radiation Damage Issues. Most Expensive Option in Terms of $ and Resourcesof $ and Resources

Variable Gap UndulatorsVariable Gap UndulatorsPlusses: Addresses Radiation Damage Issue. Allows Commissioning with Single Suite Plusses: Addresses Radiation Damage Issue. Allows Commissioning with Single Suite of Diagnostics Downstream of the Undulator. Cost Neutral with respect to Full of Diagnostics Downstream of the Undulator. Cost Neutral with respect to Full DiagnosticsDiagnostics

Minuses: Redesign of Undulator to Incorporate Variable Gap Function. Might Decouple Minuses: Redesign of Undulator to Incorporate Variable Gap Function. Might Decouple Quads from Undulator. Quads from Undulator.

Translatable UndulatorsTranslatable UndulatorsPlusses: Addresses Radiation Damage Issues. Allows Commissioning with Single Suite Plusses: Addresses Radiation Damage Issues. Allows Commissioning with Single Suite of Diagnostics Downstream of the Undulator. Much Cheaper.of Diagnostics Downstream of the Undulator. Much Cheaper.

Minuses: Decouples Quads from Undulator. Movers more complicated but doable.Minuses: Decouples Quads from Undulator. Movers more complicated but doable.

Trajectory DistortionTrajectory DistortionPlusses: Allows Commissioning with All Undulators in PlacePlusses: Allows Commissioning with All Undulators in Place

Minuses: Does not Address Radiation Damage Issues. Much Cheaper. Subject to Minuses: Does not Address Radiation Damage Issues. Much Cheaper. Subject to Feasibility Study.Feasibility Study.

Full Diagnostics Between UndulatorsFull Diagnostics Between UndulatorsPlusses: Allows Commissioning with all undulators in placePlusses: Allows Commissioning with all undulators in place

Minuses: Does not Address Radiation Damage Issues. Most Expensive Option in Terms Minuses: Does not Address Radiation Damage Issues. Most Expensive Option in Terms of $ and Resourcesof $ and Resources

Variable Gap UndulatorsVariable Gap UndulatorsPlusses: Addresses Radiation Damage Issue. Allows Commissioning with Single Suite Plusses: Addresses Radiation Damage Issue. Allows Commissioning with Single Suite of Diagnostics Downstream of the Undulator. Cost Neutral with respect to Full of Diagnostics Downstream of the Undulator. Cost Neutral with respect to Full DiagnosticsDiagnostics

Minuses: Redesign of Undulator to Incorporate Variable Gap Function. Might Decouple Minuses: Redesign of Undulator to Incorporate Variable Gap Function. Might Decouple Quads from Undulator. Quads from Undulator.

Translatable UndulatorsTranslatable UndulatorsPlusses: Addresses Radiation Damage Issues. Allows Commissioning with Single Suite Plusses: Addresses Radiation Damage Issues. Allows Commissioning with Single Suite of Diagnostics Downstream of the Undulator. Much Cheaper.of Diagnostics Downstream of the Undulator. Much Cheaper.

Minuses: Decouples Quads from Undulator. Movers more complicated but doable.Minuses: Decouples Quads from Undulator. Movers more complicated but doable.

Trajectory DistortionTrajectory DistortionPlusses: Allows Commissioning with All Undulators in PlacePlusses: Allows Commissioning with All Undulators in Place

Minuses: Does not Address Radiation Damage Issues. Much Cheaper. Subject to Minuses: Does not Address Radiation Damage Issues. Much Cheaper. Subject to Feasibility Study.Feasibility Study.




Commissioning PhasesCommissioning PhasesCommissioning PhasesCommissioning Phases

Phase 0: Beam Through Undulator (at 0.2 nC, sngl shot)Phase 0: Beam Through Undulator (at 0.2 nC, sngl shot)

Phase I: Spontaneous Radiation (at 0.2 nC, 10 Hz)Phase I: Spontaneous Radiation (at 0.2 nC, 10 Hz)

Parameters: Energy 4.45-14.1 GeV, Emittance: not criticalParameters: Energy 4.45-14.1 GeV, Emittance: not critical

Goals: Establish straight and stable trajectory, measure spontaneous Goals: Establish straight and stable trajectory, measure spontaneous radiation radiation

Phase II: Low Energy FEL Radiation (at 0.2-1 nC, 10 Hz)Phase II: Low Energy FEL Radiation (at 0.2-1 nC, 10 Hz)

Parameters:Parameters: Energy: 4.45 GeV, Emittance: < 4 micronsEnergy: 4.45 GeV, Emittance: < 4 micronsPeak Current : < 1 kAPeak Current : < 1 kA

Goals: Characterize FEL radiation. Achieve saturation.Goals: Characterize FEL radiation. Achieve saturation.

Phase III: High Energy FEL Radiation (at 0.2-1 nC, 10 Hz)Phase III: High Energy FEL Radiation (at 0.2-1 nC, 10 Hz)

Parameters:Parameters: Energy: >4.45 -14.1 GeV, Emittance: 1.2- 4 Energy: >4.45 -14.1 GeV, Emittance: 1.2- 4 micronsmicrons

Peak Current : 1-3.4 kAPeak Current : 1-3.4 kA

Goals: Characterize FEL radiation, gain. Achieve saturation.Goals: Characterize FEL radiation, gain. Achieve saturation.

Phase 0: Beam Through Undulator (at 0.2 nC, sngl shot)Phase 0: Beam Through Undulator (at 0.2 nC, sngl shot)

Phase I: Spontaneous Radiation (at 0.2 nC, 10 Hz)Phase I: Spontaneous Radiation (at 0.2 nC, 10 Hz)

Parameters: Energy 4.45-14.1 GeV, Emittance: not criticalParameters: Energy 4.45-14.1 GeV, Emittance: not critical

Goals: Establish straight and stable trajectory, measure spontaneous Goals: Establish straight and stable trajectory, measure spontaneous radiation radiation

Phase II: Low Energy FEL Radiation (at 0.2-1 nC, 10 Hz)Phase II: Low Energy FEL Radiation (at 0.2-1 nC, 10 Hz)

Parameters:Parameters: Energy: 4.45 GeV, Emittance: < 4 micronsEnergy: 4.45 GeV, Emittance: < 4 micronsPeak Current : < 1 kAPeak Current : < 1 kA

Goals: Characterize FEL radiation. Achieve saturation.Goals: Characterize FEL radiation. Achieve saturation.

Phase III: High Energy FEL Radiation (at 0.2-1 nC, 10 Hz)Phase III: High Energy FEL Radiation (at 0.2-1 nC, 10 Hz)

Parameters:Parameters: Energy: >4.45 -14.1 GeV, Emittance: 1.2- 4 Energy: >4.45 -14.1 GeV, Emittance: 1.2- 4 micronsmicrons

Peak Current : 1-3.4 kAPeak Current : 1-3.4 kA

Goals: Characterize FEL radiation, gain. Achieve saturation.Goals: Characterize FEL radiation, gain. Achieve saturation.




ConclusionsConclusions

Workshop Goal is to provide input to prepare a document Workshop Goal is to provide input to prepare a document describing the commissioning of the LCLS undulator with beam.describing the commissioning of the LCLS undulator with beam.

Main Issues are:Main Issues are:Definition of a Commissioning Procedure that provides Undulator Definition of a Commissioning Procedure that provides Undulator Radiation ProtectionRadiation Protection

Selection of a Method for Measuring Radiation Properties along Selection of a Method for Measuring Radiation Properties along UndulatorUndulator

Multiple Detectors Positioned Along UndulatorMultiple Detectors Positioned Along Undulator

Gain Termination through Trajectory DistortionGain Termination through Trajectory Distortion

Removable Undulator SegmentsRemovable Undulator Segments

Variable Undulator GapsVariable Undulator Gaps

Definition of R&D Program for Diagnostics ComponentsDefinition of R&D Program for Diagnostics Components

Code Development to Support CommissioningCode Development to Support Commissioning

Time is short – Quite a number of questions remains Time is short – Quite a number of questions remains unansweredunanswered

Workshop Goal is to provide input to prepare a document Workshop Goal is to provide input to prepare a document describing the commissioning of the LCLS undulator with beam.describing the commissioning of the LCLS undulator with beam.

Main Issues are:Main Issues are:Definition of a Commissioning Procedure that provides Undulator Definition of a Commissioning Procedure that provides Undulator Radiation ProtectionRadiation Protection

Selection of a Method for Measuring Radiation Properties along Selection of a Method for Measuring Radiation Properties along UndulatorUndulator

Multiple Detectors Positioned Along UndulatorMultiple Detectors Positioned Along Undulator

Gain Termination through Trajectory DistortionGain Termination through Trajectory Distortion

Removable Undulator SegmentsRemovable Undulator Segments

Variable Undulator GapsVariable Undulator Gaps

Definition of R&D Program for Diagnostics ComponentsDefinition of R&D Program for Diagnostics Components

Code Development to Support CommissioningCode Development to Support Commissioning

Time is short – Quite a number of questions remains Time is short – Quite a number of questions remains unansweredunanswered




End of Presentation

Documents

Workshop Issues [email protected] Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center Diagnostics