Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 1 Diagnostics/Common Optics: Priorities, Engineering Facility Advisory Committee Breakout Session 3 – X-Ray Systems, Including LUSI November Yiping Feng – Instrument Scientist Eliazar Ortiz – Lead Engineer Marc Campell – Mechanical Engineer Tim Montagne – Mechanical Engineer Rick Jackson – Design Engineer Don Arnett – Designer Ben Bigornia – Designer Joseph Stieber- Designer

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 2 Outline Distribution Profile, Intensity, Intensity-Position Monitor Slits Pulse Picker Attenuator

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 3 Components Distribution Components locations Distributed throughout the XPP, CXI, and XCS instruments, including X-ray transport tunnel SXR CXI Endstation Near Experimental Hall Far Experimental Hall X-ray Transport Tunnel XCS Endstation XPP Endstation AMO HEDS LCLS X-ray FEL

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 4 Components Distribution (cont.) Diagnostics/OpticsXPPCXIXCSTotal Pop-in Profile Monitor34512 Wavefront Monitor 1 1 Pop-in Intensity Monitor2259 Intensity-Position Monitor33511 Monochromator 11 X-Ray Focusing Lenses1 12 Slit System34613 Attenuators-Filters1113 Pulse Picker1113 Harmonic Rejection Mirrors1 12

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 5 Profile Monitor Purpose: Coarse beam alignment/monitoring; Coarse/fine beam profile Specifications: Destructive; Retractable At 100  m resolution - 24x24 mm 2 field of view; At 8  m resolution - 2x2 mm 2 field of view Capable of per-pulse 120 Hz Mechanical Requirements Scintillator 45º mirror Optical zoom lens Optical pixelated detector

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 6 Profile Monitor Challenges Design continuity Space Constraints Commonality Chamber Stands Stages Solutions Permanent staffing commitments Combine IM/PM Common mount for all monitor sensors Concepts based on proven designs Similarity to LCLS wire scanner

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 7 Profile Monitor Next Steps Update Spec. Documentation -Nov 08 PDR PM and Supports -Nov 08 Finalize Design PM -Dec08 Finalize Support Design -Dec08 FDR PM & Supports -Feb 09 Drawings -May 09

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 8 Intensity Monitor Purpose: Coarse beam alignment/monitoring; Simple point detector Specifications: Destructive; Retractable Relative accuracy < 1% Dynamic range 100 Capable of per-pulse 120 Hz Mechanical Requirements

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 9 Intensity Monitor Challenges Design continuity Commonality Chamber Stands Stages Solutions Permanent staffing commitments Common mount for all monitor sensors Concepts based on proven designs Similarity to LCLS wire scanner

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 10 Intensity Monitor Next Steps Update Spec. Documentation -Nov 08 PDR IM and Supports -Nov 08 Finalize Design IM -Dec 08 Finalize Support Design -Dec08 FDR IM & Supports -April 09 Drawings -Aug 09

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 11 Intensity-Position Monitor Purpose: Per-pulse normalization of experimental signals High-resolution beam position monitoring Specifications: Highly transmissive (< 5% loss) Relative accuracy < 0.1% Dynamic range 1000 Per-pulse op. at 120 Hz Mechanical Requirements

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 12 Intensity-Position Monitor Challenges Design continuity Space Constraints Commonality Chamber Stands Stages Solutions Permanent staffing commitments Common shaft mount for all monitor sensors Concepts based on proven designs Similarity to LCLS wire scanner

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 13 Intensity-Position Monitor Next Steps Update Spec. Documentation -Nov 08 PDR PM and Supports -Nov 08 Finalize Design PM –Dec 08 Finalize Support Design–Dec 08 FDR PM & Supports - Jan 09 Drawings -March 09

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 14 Slits Purpose: Defines the beam size & position Clean up scatterings (halo) around beam perimeter Specifications: Can withstand full LCLS flux – unfocused Minimize background scatter from blades Mechanical Requirements High-Z Low-Z High-Z Pink beam Mono beam D=3 mm

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 15 Slits Challenges Precise Motion Space Constraints Vendor performance capabilities have been put into question Solutions Available commercial products that would meet specifications with minor modifications. Commercial product meets envelope requirements Inspection reports have been requested from vendor on latest batch Slit loaner has been requested from vendor for in-house evaluation Inquired references from vendor and other labs about their experience with ADC’s slits.

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 16 High-Z Low-Z High-Z Pink beam Mono beam D=3 mm Slits Next Steps Update Spec. Documentation -Nov 08 PDR -Nov 08 Finalize Design –Dec 08 FDR PM & Supports - Jan 09 Inspect loaned unit –Feb 09 Drawings -March 09

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 17 Pulse Picker Design * Si3N4 coating on blade to reduce damage Purposes Select a single pulse or any sequence of pulses Reduce LCLS repetition rate to < 10 Hz Specifications < 3 ms switching time < 8 ms in close/open cycle time Only for < 10 Hz operation Withstand full LCLS flux Implementation Based on a commercial mechanical teeter- totter* Steel blade fully stops beam Si 3 N 4 required to protect the steel blade Capable of ms transient time Requires 100  m Mechanical Requirements

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 18 Pulse Picker Challenges Blade Coating Space Constraints X < 300 mm Minimize Z length Solutions Brazing schemes under study Combined attenuator with Pulse picker device

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 19 Pulse Picker Next Steps Update Spec. Documentation -Nov 08 PDR PP and Supports -Nov 08 Finalize Design PP –Dec 08 Finalize Support Design–Dec 08 FDR PP & Supports - Jan 09 Drawings -March 09

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 20 Attenuator Purpose Reduce incident X-ray flux Sample damage Detector saturation Diagnostic saturation Alignment of optics and diagnostics Attenuator Specifications Minimize wavefront distortion and coherence degradation Withstand unfocused flux 10 8 attenuation at 8.3 keV 10 5 attenuation at 24.9 keV 3 steps per decade Mechanical Requirements Attenuator System

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 21 Attenuator System Challenges Avoid pneumatic actuators Space Constraints X < 300 mm Minimize Z length Solutions Use of actuators with stepper motors Actuators meets envelope requirements Reduce number of view ports Combined attenuator with Pulse picker device

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 22 Attenuator System Next Steps Update Spec. Documentation -Nov 08 PDR Attn. and Supports -Nov 08 Finalize Design Attn –Dec 08 Finalize Support Design–Dec 08 FDR Attn & Supports - Jan 09 Drawings -March 09

Eliazar Ortiz LUSI Diagnostics & Common November 11-13, 2008 SLAC National Accelerator Laboratory 23 Summary Designs are progressing Challenges have emerged Vendor reputation Space constraints in X and Z Steps are being taken to overcome challenges