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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Pump-Probe Instrument D. M. Fritz Pump-probe Experiments System Description X-ray optics Laser System Detector Sample environments Laser/X-ray Timing Technical Choice Pump-probe Experiments System Description X-ray optics Laser System Detector Sample environments Laser/X-ray Timing Technical Choice

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument Science Team Specifications and instrument concept developed with the science team. The XRPP team Kelly Gaffney (leader), SSRL/SLAC Jorgen Larsson, Lund Institute of Technology, Sweden David Reis, University of Michigan Thomas Tschentscher, DESY, Germany Specifications and instrument concept developed with the science team. The XRPP team Kelly Gaffney (leader), SSRL/SLAC Jorgen Larsson, Lund Institute of Technology, Sweden David Reis, University of Michigan Thomas Tschentscher, DESY, Germany

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Pump-Probe Science Phase Transitions Order / Disorder Metal/Insulator Phonon Dynamics Charge Transfer Reactions Photosynthesis Photovoltaics Vision Photoactive Proteins 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

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument Time Resolved Scattering

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Pump-Probe Instrument Offset Monochromator Laser System (Fundamental) X-ray Diffractometer Wavelength Conversion Small Angle Scattering

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Optics Double Crystal Offset Monochromator Narrows x-ray spectrum for resonant scattering experiments Multiplexes LCLS beam (mono. beam, diagnostic beam) Double Crystal Offset Monochromator Narrows x-ray spectrum for resonant scattering experiments Multiplexes LCLS beam (mono. beam, diagnostic beam) 6 24 keVEnergy Range 4 arcsec Accuracy 0.02 arcsec Accuracy 9 0 - 50 0 Scattering Angle 600 mmHorizontal Offset ValueParameter Scattering Angles (2 theta) 1.5 0.5 Silicon 111 27.69.1 Silicon 220 45.814.9 Diamond 111 42.513.9 Diamond 220 -22.8

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Optics Double Crystal Offset Monochromator for 2 m Si (111) @ 1.5 85% transmission,2.5% - Mono beam, 1.3% - Diagnostics beam Double Crystal Offset Monochromator for 2 m Si (111) @ 1.5 85% transmission,2.5% - Mono beam, 1.3% - Diagnostics beam

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Optics Double Crystal Offset Monochromator (cont.) motion 0.02 arcsecond resolution and repeatability (100 nrad) Double Crystal Offset Monochromator (cont.) motion 0.02 arcsecond resolution and repeatability (100 nrad) Flexure Stages Piezoelectric Stages

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument X-ray Optics Beryllium lens focusing optic Variable spot size from 2-10 m and 40-60 m @ 8.3 keV Variable spot size from 2-10 m @ 24.9 keV > 40% throughput Positioning resolution and repeatability to 1 m Beryllium lens focusing optic Variable spot size from 2-10 m and 40-60 m @ 8.3 keV Variable spot size from 2-10 m @ 24.9 keV > 40% throughput Positioning resolution and repeatability to 1 m Lens Mono 190 m 4 m

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument Laser System Overview

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument Ultrafast Laser System Ti:Sapphire Oscillator & Power Amplifiers Compressor, OPA, Harmonic Generation, Delay Stage

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument Ultrafast Laser System Ti:Sapphire Oscillator 119 MHz rep. rate,

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D. M. Fritz dmfritz@slac.stanford.edu LCLS FAC Meeting April 16, 2007 XPP Instrument Ultrafast Laser System Power Amplifiers Regenerative amplifier ~ 2.5 mJ (< 1% rms stability), 120 Hz,