1. LUSI X-ray Pump-Probe Instrument WBS 1.2
David Fritz – XPP Instrument Scientist
LUSI CD-2 Review
August 19, 2008
Team Leader: Kelly Gaffney
Second Scientist: Marc Messerschmidt
Lead Engineer: J. Brian Langton
Designer: Jim Defever
Designer: Jim Delor
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2. Outline XPP Science XPP Location System Physics Requirements
System Scope
System Description
System Layout
CD-4A Deliverables
Early Science
Schedule
Costs
Major Risks
6-month Look-ahead
Summary

3. Science Team
Specifications and instrument concept developed with the science team.
The XPP team leaders
Kelly Gaffney, Photon Science, SLAC (leader)
Jorgen Larsson, Lund Institute of Technology, Sweden
David Reis, University of Michigan
Thomas Tschentscher, DESY, Germany
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4. Time Resolved Scattering
The x-ray pump-probe instrument will take advantage of the ultrashort pulse duration of the LCLS to take snapshots of a photo-induced phenomena.
In general, the experiments performed as this endstation will use an ultrafast laser pulse to initiate a transient response in a system. The system will be probed using various x-ray scattering techniques. The time evolution of the response will be mapped by variably delaying the arrival time of the x-ray pulse with respect to the pump laser pulse.
The success of this end station will depend upon the ability to accommodate a wide variety of laser excitation techniques, samples, sample environments and x-ray scattering methods.
C. Siders

5. X-ray Pump-Probe Science
Phase Transitions
Order / Disorder
Metal/Insulator
Charge Transfer Reactions
Photosynthesis
Photovoltaics
Vision
Vibrational Dynamics
Energy Dissipation and Flow
photo-
excitation
Stampfli and Bennemann Phys. Rev. B 49, 7299 (1994)
photo-
excitation
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6. XPP Instrument Location
Near Experimental Hall
X-ray Transport Tunnel
AMO
(LCLS)
XPP
Endstation
XCS
CXI
Far Experimental Hall
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7. Near Experimental Hall
AMO
Control Room
XPP
Control Room
AMO
(LCLS)
XPP
Endstation
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8. XPP Physics Requirements
Goals
Perform time resolved experiments at the highest temporal resolution achievable (80 fs rms)
Accommodate as many classes of experiments are reasonable achievable
Capable of running in a shared beam mode using a future beam splitting monochromator
Instrument must be accessible while beam is delivered to FEH
Tailor and characterize X-ray and optical beam parameters
Spatial profile
Intensity
Repetition rate
Spectral bandwidth
Wavelength (optical laser)
Temporal profile (optical laser)
Key Performance Parameters
4-20 keV
Using fundamental and third harmonic
% energy resolution
1000 x 1000 pixel detector

9. XPP Physics Requirements
Photon Shutter
Requirement
Device
Tailor X-ray spatial profile ( > 50 microns)
X-ray Slits
Tailor X-ray spatial profile ( < 50 microns )
X-ray Focusing Lenses
Tailor X-ray intensity and spectrum
Attenuators
Tailor X-ray repetition rate
Pulse Picker
Tailor X-ray spectrum
Harmonic Rejection Mirrors
Characterize X-ray pulse intensity
Intensity Monitor
Characterize X-ray spatial profile
Profile Monitor
Sample orientation
Sample goniometer
Position X-ray area detector
Detector Mover
Measure X-ray scattering pattern
Detector
Photoexcitation of samples
Laser System
Characterize spatial profile, temporal profile, spectrum, intensity at a virtual sample
Laser Diagnostics
Intensity Monitor
Slits
Profile Monitor
Intensity Monitor
Slits
Focusing Lenses
Attenuators
Pulse Picker
Mirrors
Slits
Intensity Monitor
Profile Monitor
Sample Goniometer
Detector Mover
Profile Monitor
Intensity Monitor
Photon Shutter

10. XPP Scope - WBS 1.2 WBS Scope/CD-2 Cost Includes: 1.2.1
XPP System Integration & Design
1.2.2
XPP X-ray optics and diagnostics support tables
1.2.3
XPP Ultrafast laser system
1.2.4
XPP 2D Detector from BNL by MOU
1.2.5
XPP Sample goniometer
XPP Detector mover
1.2.6
XPP Hutch Facilities
1.2.7
XPP Vacuum system
1.2.8
XPP Installation
Other Related WBS
1.5
Diagnostics & Common Optics
1.6
Controls and Data Acquisition
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11. XPP System Description
1.2.2 XPP X-ray Optics and Supports
Fixed table (hutch 2) and 2 translating tables (hutch 3)
Rigid support structures that will define the x-ray optical axis
Design goals in priority order
Stabilize optics with respect to each other (short & long term)
Stabilize optics with respect to global coordinate system

12. XPP System Description
1.2.3 XPP Laser System
Will utilize and expand upon AMO laser system
AMO Laser Requirements
> 3 mJ per pulse energy at sample (800 nm)
< 50 fs pulse duration
120 Hz
< 100 fs phase jitter to LCLS RF
Multipass amplifier
>20 mJ per pulse energy (800 nm)
Frequency conversion capability
OPA
Harmonic generation
Temporal pulse shaping capability
Diagnostics suite
System designed such that a non-laser trained user can perform an XPP experiment
Sufficient automation to control laser parameters
Sufficient engineering controls to provide safe working environment
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13. XPP System Description
1.2.4 XPP Detector System
Developed at BNL via MOU
High detector quantum efficiency
Single photon sensitivity
Large dynamic range >103
104 photon dynamic range per pixel
120 Hz readout rate
1024 x 1024 square pixels
90 µm pixel size
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14. XPP System Description
1.2.5 – Sample Goniometer
Flexibility to accommodate a wide variety of sample environments (50 kg)
Capable of orienting small samples (~ 50 μm) over a wide range of reciprocal space
Sphere of confusion < 30μm
Open access to allow close proximity laser optics
Operate in direct or future monochromatic beam
No interference with direct beamline while in monochromatic mode
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15. XPP System Description
1.2.5 – Detector Mover
10 cm – 100 cm sample to detector distance in forward-scattering upper hemisphere quadrant
10 cm – 50 cm sample to detector distance in back-scattering upper hemisphere quadrant
Repeatable position the XPP detector pixels to a fraction of the pixel size
Definitively know the position of all detector pixels to a fraction of the pixel size
Operate in both interaction points
No interference with direct beamline while in monochromatic mode
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16. XPP System Description
1.2.6 XPP Hutch facilities
Raised flooring
Storage cabinets, work benches and tool chests
Utilities distribution
1.2.7 XPP Vacuum system
1.2.8 XPP Installation
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17. XPP Instrument Layout

18. XPP Instrument Design Detector Mover Detector Ultrafast Laser
Diagnostics
Sample Goniometer
X-ray Optics & Diagnostics
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19. CD 4A XPP Instrumentation
CD-4A components
Sample Goniometer
Detector Mover
Support Tables and Shielding
Ultrafast Laser System
Shared AMO Laser
Optics, optomechanics and diagnostics
Common optics and Diagnostics
Pulse Picker
Slits
All Diagnostics
CD-4C components
Ultrafast Lsser System
Power Amplifier
OPA
Common optics and Diagnostics
Attenuators
X-ray Focusing Lenses
Harmonic Rejection Mirrors

20. XPP Early Science Early experimental techniques
Time-resolved diffraction
Time-resolved diffuse scattering
~ 100 fs temporal resolution (single shot)
Non-thermal melting and large amplitude coherent phonons
Natural extension to research performed at SPPS
Characterize source and instrument capabilities
Interaction of FEL with solid state matter as soon as LCLS reaches saturation

21. XPP Schedule Preliminary Design Reviews
Optics Support Tables – August 2008
Sample Goniometer – December 2008
Detector Mover – January 2009
Final Instrument Design Review – February 2009
Final Design Reviews
Optics Support Tables – January 2009
Sample Goniometer – January 2009
Detector Mover – April 2009
CD-3A - July 2009
Award PO
Optics Support Tables – October 2009
Sample Goniometer – July 2009
Detector Mover – September 2009
Receive
Optics Support Tables – February 2010
Sample Goniometer – April 2010
Detector Mover – April 2010
CD-4A - December 2010 (Early Finish July 2010)

22. XPP Schedule FY08 FY09 FY10 FY11 Preliminary Design Reviews
X-ray Optics Support Tables – August 2008
Sample Goniometer – December 2008
Detector Mover – January 2009
Optical Table Layout – May 2009
Laser Containment System – May 2009
Final Instrument Design Review – July 2009
Final Design Reviews
Sample Goniometer – April 2009
Vacuum Equipment – June 2009
Detector Mover – August 2009
X-ray Optics Support Tables – October 2009
Optical Table Layout – March 2010
Laser Containment –April 2010
Project Ready for CD-3A - June 2009
Award PO
Sample Goniometer – October 2009
Hutch Facilities – October 2009
Detector Mover – December 2009
X-ray Optics Support Tables – February 2010
Optical Tables – April 2010
Laser Optics and Optomechanics - May 2010
Laser Containment System – June 2010
Receive
Hutch Facilities – January 2010
X-ray Optics Support Tables – April 2010
Sample Goniometer – July 2010
Detector Mover – July 2010
Optical Tables – August 2010
Laser Containment System – August 2010
Laser Optics and Optomechanics - October 2010
Project Ready for CD-4A – Oct (Early Finish July 2010)

23. XPP Level 3 Cost Breakdown

24. XPP Major Risks Risk Mitigation
Detector system technical requirements not met
Late delivery of XPP detector
Mitigation
Detector system development is being closely monitored by the LCLS Detector Advisory Committee (LDAC)
A milestone is in place where a decision must be made to proceed with BNL effort or to begin a construction using Cornell technology
The prototype Cornell detector (190 x 190 pixels) will be used in the interim if the XPP detector is delayed
N. Van Bakel will discuss in detail in breakout session tomorrow.

25. 6-month Look-ahead 43 Level 4 & 5 Milestones (Early Finish)
Complete Preliminary Design, Prelimary Design Review, Final Design Review for:
X-ray Optics Support Tables
Sample Goniometer
Detector Mover
Laser Optical Table System and Safety Enclosure
Vacuum Equipment
Final Instrument Design Review (January 2009)
Instrument Ready for CD-3A (February 2009)
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26. Summary
Instrument accommodates a wide variety of cutting edge research capabilities and fulfills the CD-0 mission
Instrument concept is based on proven developments made at SPPS and SR sources
Safety hazards have been identified in the Hazard Analysis Report (HAR)
Safety issues are considered at every step of the design and fabrication process
Scope of instrument fully defined
Resource loaded schedule developed through end of project
Preliminary design of key components is well advanced
XPP and LUSI are ready for CD-2 approval
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