SLAC National Accelerator Laboratory DiagnosticsCommon Optics Priorities Engineering
SLAC National Accelerator Laboratory Diagnostics/Common Optics: Priorities, Engineering Facility Advisory Committee Breakout Session 3 – X-Ray Systems, Including LUSI November 11 -13 2008 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 November 11 -13, 2008 LUSI Diagnostics & Common Optics 1 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Outline Distribution Profile, Intensity-Position Monitor Slits Pulse Picker Attenuator November 11 -13, 2008 LUSI Diagnostics & Common Optics 2 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Components Distribution Components locations Distributed throughout the XPP, CXI, and XCS instruments, including X-ray transport tunnel HEDS el Near Experimental Hall XPP Endstation a X-r s ran T y nn Tu t r po CXI Endstation XCS Endstation L FE ray Far Experimental Hall S X L LC SXR AMO November 11 -13, 2008 LUSI Diagnostics & Common Optics 3 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Components Distribution (cont. ) Diagnostics/Optics XPP CXI XCS Total Pop-in Profile Monitor 3 4 5 12 Wavefront Monitor 1 1 Pop-in Intensity Monitor 2 2 5 9 Intensity-Position Monitor 3 3 5 11 Monochromator 1 1 X-Ray Focusing Lenses 1 1 2 Slit System 3 4 6 13 Attenuators-Filters 1 1 1 3 Pulse Picker 1 1 1 3 Harmonic Rejection Mirrors 1 1 2 November 11 -13, 2008 LUSI Diagnostics & Common Optics 4 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Purpose: Profile Monitor Optical pixelated detector Coarse beam alignment/monitoring; Coarse/fine beam profile Optical zoom lens Specifications: 45º mirror Destructive; Retractable At 100 mm resolution - 24 x 24 mm 2 field of view; At 8 mm resolution - 2 x 2 mm 2 field of view Capable of per-pulse op. @ 120 Hz Scintillator Mechanical Requirements November 11 -13, 2008 LUSI Diagnostics & Common Optics 5 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Profile Monitor Challenges Solutions Design continuity Space Constraints Commonality Permanent staffing commitments Combine IM/PM Common mount for all monitor sensors Concepts based on proven designs Chamber Stands Stages November 11 -13, 2008 LUSI Diagnostics & Common Optics 6 Similarity to LCLS wire scanner Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Profile 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 -Feb 09 Drawings -May 09 November 11 -13, 2008 LUSI Diagnostics & Common Optics 7 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Purpose: Intensity Monitor Coarse beam alignment/monitoring; Simple point detector Specifications: Destructive; Retractable Relative accuracy < 1% Dynamic range 100 Capable of per-pulse op. @ 120 Hz Mechanical Requirements November 11 -13, 2008 LUSI Diagnostics & Common Optics 8 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Intensity Monitor Challenges Solutions Design continuity Commonality Permanent staffing commitments Common mount for all monitor sensors Concepts based on proven designs Chamber Stands Stages Similarity to LCLS wire scanner November 11 -13, 2008 LUSI Diagnostics & Common Optics 9 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Intensity Monitor Next Steps Update Spec. Documentation -Nov 08 PDR IM and Supports -Nov 08 Finalize Design IM -Dec 08 Finalize Support Design -Dec 08 FDR IM & Supports -April 09 Drawings -Aug 09 November 11 -13, 2008 LUSI Diagnostics & Common Optics 10 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Purpose: Intensity-Position Monitor 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 November 11 -13, 2008 LUSI Diagnostics & Common Optics 11 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Intensity-Position Monitor Challenges Solutions Permanent staffing commitments Common shaft mount for all monitor sensors Concepts based on proven designs Design continuity Space Constraints Commonality Chamber Stands Stages November 11 -13, 2008 LUSI Diagnostics & Common Optics Similarity to LCLS wire scanner 12 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory 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 November 11 -13, 2008 LUSI Diagnostics & Common Optics 13 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Purpose: Slits 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 November 11 -13, 2008 LUSI Diagnostics & Common Optics 14 Pink beam Low-Z High-Z Mono beam D=3 mm High-Z Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Slits Solutions Challenges Precise Motion Space Constraints Vendor performance capabilities have been put into question November 11 -13, 2008 LUSI Diagnostics & Common Optics 15 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 ortize@slac. stanford. edu
SLAC National Accelerator Laboratory 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 Pink beam Low-Z High-Z Mono beam D=3 mm High-Z November 11 -13, 2008 LUSI Diagnostics & Common Optics 16 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Purposes Pulse Picker Design 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 Si 3 N 4 coating on blade to reduce damage Implementation Based on a commercial mechanical teeter-totter* * http: //www. azsol. ch/ Steel blade fully stops beam Si 3 N 4 required to protect the steel blade Capable of ms transient time Requires 100 mm Mechanical Requirements November 11 -13, 2008 LUSI Diagnostics & Common Optics 17 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Pulse Picker Solutions Challenges Brazing schemes under study Combined attenuator with Pulse picker device Blade Coating Space Constraints X < 300 mm Minimize Z length November 11 -13, 2008 LUSI Diagnostics & Common Optics 18 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory 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 November 11 -13, 2008 LUSI Diagnostics & Common Optics 19 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Attenuator Purpose Attenuator System 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 108 attenuation at 8. 3 ke. V 105 attenuation at 24. 9 ke. V 3 steps per decade Mechanical Requirements November 11 -13, 2008 LUSI Diagnostics & Common Optics 20 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Attenuator System Solutions Challenges Use of actuators with stepper motors Actuators meets envelope requirements Reduce number of view ports Combined attenuator with Pulse picker device Avoid pneumatic actuators Space Constraints X < 300 mm Minimize Z length November 11 -13, 2008 LUSI Diagnostics & Common Optics 21 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory 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 November 11 -13, 2008 LUSI Diagnostics & Common Optics 22 Eliazar Ortiz ortize@slac. stanford. edu
SLAC National Accelerator Laboratory Summary Designs are progressing Challenges have emerged Vendor reputation Space constraints in X and Z Steps are being taken to overcome challenges November 11 -13, 2008 LUSI Diagnostics & Common Optics 23 Eliazar Ortiz ortize@slac. stanford. edu
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