1 / 21

X-ray Pump-Probe (WBS 1.2) David Fritz

X-ray Pump-Probe (WBS 1.2) David Fritz. System Specifications System Description WBS Early Science Schedule and Costs Summary. Science Team. Specifications and instrument concept developed with the science team. The XPP team leaders Kelly Gaffney, Photon Science, SLAC (leader)

demetrius-kelly
Download Presentation

X-ray Pump-Probe (WBS 1.2) David Fritz

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. X-ray Pump-Probe(WBS 1.2)David Fritz System Specifications System Description WBS Early Science Schedule and Costs Summary

  2. 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

  3. X-ray Pump-Probe Science • Phase Transitions • Order / Disorder • Metal/Insulator • Phonon Dynamics • Charge Transfer Reactions • Photosynthesis • Photovoltaics • Vision • Photoactive Proteins photo- excitation Stampfli and Bennemann Phys. Rev. B 49, 7299 (1994) photo- excitation

  4. Time Resolved Scattering

  5. Ultrafast Hard X-ray Sources to Date • 3rd Generation Synchrotrons (APS) • ~ 1 x 10 9 photons/second coincident with a 1 kHz Laser • 100 ps pulse duration • Slicing Source • ~ 1 x 10 6 photons/second coincident with a 1 kHz Laser • 100 fs pulse duration • Laser Plasma Source • ~ 1 x 10 5 photons/second collected at 10 Hz • 300 fs pulse duration • Sub-Picosecond Pulse Source • ~ 1 x 10 7 photons/second coincident with a 10 Hz Laser • 100 fs pulse duration

  6. Ultrafast X-ray Science to Date • Limited to slow processes ( > 100 ps) or • X-ray diffraction from single crystals Non-thermal Melting of Semiconductors Large Amplitude Coherent Phonons Single Shot at SPPS 20 minute acquisition at SPPS

  7. XPP SCOPE - WBS 1.2

  8. System Specifications

  9. Laser System (Fundamental) X-ray Diffractometer & BNL Detector X-ray Optics and Diagnostics Small Angle Scattering Wavelength Conversion Offset Monochromator X-ray Pump-Probe Instrument

  10. XPP System Description • 1.2.1 Physics support and engineering integration • 1.2.2 X-ray optics • 1.2.3 Laser system • 1.2.4 Detector • 1.2.5 Sample environments • 1.2.6 Laboratory facilities • 1.2.7 Vacuum system • 1.2.8 Installation

  11. X-ray Pump-Probe System Description (2) • 1.2.2 X-ray optics • Monochromator • Thin crystals • Be lens • Slits • Attenuators

  12. X-ray Pump-Probe System Description (3) • 1.2.3 Femtosecond laser system (similar to LCLS gun laser) • Ti:Sapphire based system • Up to 20 mJ/pulse (<1.5 % rms stability) , < 50 fs, 800 nm, 120 Hz • Synchronized to LCLS RF ( <300 fs rms integrated jitter) • Wavelength tunable • Harmonic generation (400 nm, 266 nm) • Parametric amplification (240 nm – 11,000 nm) • Temporal pulse shaper • Diagnostics • Energy, wavelength, temporal profile, contrast, spatial profile • 1.2.4 Detectors • 2D Detector (BNL) • 1024 x 1024 pixels • 90 micron pixel size • 10 4 dynamic range • 120 Hz readout rate • X-ray Emission Spectrometer • 100 eV dynamic range • 1 eV resolution • High collection efficiency

  13. X-ray Pump-Probe System Description (4) • 1.2.5 Sample environments • X-ray diffractometer • Operate in both direct and monochromatic beam • Detector motion about a spherical surface centered at sample • Cryostat • X-ray and optical window (collinear and non-collinear geometry) • Decoupled sample motion from vacuum shroud • Cryostream • Liquid jet • Vacuum chamber

  14. X-ray Pump-Probe System Description (5) • 1.2.6 Laboratory facilities • 1.2.7 Vacuum system • 1.2.8 Installation

  15. 1.2 WBS

  16. CD 4a XPP Instrumentation LCLS AMO Laser Detector X-ray Diffractometer X-ray Optics and Diagnostics

  17. CD 4a XPP Science • 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 • Early experimental techniques • Time-resolved diffraction • Time-resolved diffuse scattering • ~ 100 fs temporal resolution

  18. XPP Schedule in Primavera 3.1

  19. XPP Milestones CD-1 Aug 01, 07 Conceptual Design Complete Sep 21, 07 CD-2a Dec 03, 07 CD-3a Jul 21, 08 Phase I Final Design Complete Oct 15, 08 Receive Diffractometer Feb 19, 09 Receive Focusing Lenses Feb 27, 09 Receive Laser Optics and Diagnostics Mar 18, 09 Phase I Installation Complete Oct 01, 09 Install BNL XPP Detector Nov 03, 09 CD-4a Feb 08, 10

  20. XPP Cost Estimate

  21. Summary • Instrument concept is advanced • 100% of Letters of Intent are represented in instrument concept • Standing monthly meeting with XPP team • Instrument concept is based on proven developments made at SPPS and SR sources • Initial specifications well developed • Ready to proceed with baseline cost and schedule development

More Related