Eliazar Ortiz LUSI Diagnostics & Common [email protected] November 11-13, 2008 SLAC National Accelerator Laboratory 1 Diagnostics/Common Optics:

Eliazar Ortiz

LUSI Diagnostics & Common Optics [email protected]

November 11-13, 20081

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 ScientistEliazar Ortiz – Lead EngineerMarc Campell – Mechanical EngineerTim Montagne – Mechanical EngineerRick Jackson – Design EngineerDon Arnett – DesignerBen Bigornia – DesignerJoseph Stieber- Designer

Eliazar Ortiz


November 11-13, 20082


Outline

Distribution

Profile, Intensity, Intensity-Position Monitor

Slits

Pulse Picker

Attenuator

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November 11-13, 20083


Components DistributionComponents locations

Distributed throughout the XPP, CXI, and XCS instruments, including X-ray transport tunnel

SXR

CXIEndstation

Near Experimental Hall

Far Experimental Hall

X-ray Transport

Tunnel

XCSEndstation

XPPEndstation

AMO

HEDS

LCLS X-ray FEL

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November 11-13, 20084


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

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November 11-13, 20085


Profile MonitorPurpose:

Coarse beam alignment/monitoring; Coarse/fine beam profile

Specifications:Destructive; RetractableAt 100 m resolution - 24x24 mm2

field of view;At 8 m resolution - 2x2 mm2 field of viewCapable of per-pulse op. @ 120 Hz

Mechanical Requirements

Scintillator

45º mirror

Optical zoom lens

Optical pixelated detector

DeviceVacuum

TorrVibration Amplitude

( freq > 1 Hz )

Angular Vibration Amplitude

( freq > 1 Hz )

Thermal Translational

Stability (days)

Static Angular Alignment to

theoretical beam

Translation range

Translation resolution

Y Translation Repeatability

PitchStability

YawStability

1.5.02.01 Pop-in Profile Monitor (Camera) 10-7 < 1 μm ±0.5° (pitch, yaw) ≤ 20 μm ±1° (pitch, yaw) TBD 100 μm 100 μm 0.1º 0.1º

1.5.02.01 Pop-in Profile Monitor (Camera) n/a < 1 μm ±0.1° (pitch, yaw)

5 μm (Wavefront)20 μm (Profile) ±1° (pitch, yaw) n/a n/a n/a 0.1º 0.1º

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November 11-13, 20086


Profile Monitor

ChallengesDesign continuity

Space Constraints

CommonalityChamber

Stands

Stages

SolutionsPermanent staffing commitments

Combine IM/PM

Common mount for all monitor sensors

Concepts based on proven designs

Similarity to LCLS wire scanner

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November 11-13, 20087


Profile Monitor

Next StepsUpdate 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

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November 11-13, 20088


Si Diode

FEL pulses

Si Diode

FEL pulses

Intensity MonitorPurpose:

Coarse beam alignment/monitoring; Simple point detector

Specifications:Destructive; Retractable

Relative accuracy < 1%

Dynamic range 100

Capable of per-pulse op. @ 120 Hz

Mechanical RequirementsDevice

VacuumTorr

Vibration Amplitude( freq > 1 Hz )


( freq > 1 Hz )


Stability (days)


theoretical beam

Translation range



PitchStability

YawStability

1.5.02.02 Pop-In Intensity Monitor 10-7 < 10 μm ±0.1° (pitch, yaw) ≤ 50 μm ±3° (pitch, yaw) TBD 100 μm 100 μm 1º 1º

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November 11-13, 20089


Intensity Monitor


CommonalityChamber

Stands

Stages


Common mount for all monitor sensors



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November 11-13, 200810


Intensity Monitor


PDR IM and Supports -Nov 08

Finalize Design IM -Dec 08

Finalize Support Design -Dec08

FDR IM & Supports -April 09

Drawings -Aug 09

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November 11-13, 200811


Intensity-Position MonitorPurpose:

Per-pulse normalization of experimental signalsHigh-resolution beam position monitoring

Specifications:Highly transmissive (< 5% loss)Relative accuracy < 0.1%Dynamic range 1000Per-pulse op. at 120 Hz


R2

R121

L

foil

Quad-Detector

FEL

Quad-channel Circuitry

R2

R121

L

foil

Quad-Detector

FEL


R2

R121

L

foil

Quad-Detector

FEL

R2

R121

L

foil

Quad-Detector

FEL


DeviceVacuum

Torr

Vibration Amplitude

( freq > 1 Hz )


( freq > 1 Hz )


Stability (days)


theoretical beam

Translation range


X Translation Repeatability


PitchStability

YawStability

1.5.02.03 Intensity-Position Monitor (Sensor) 10-7 < 1 μm ±0.1° (pitch, yaw) ≤ 5 μm ±1° (pitch, yaw)

X: ±5 mmY: 28mm 5 μm 5 μm 5 μm 1º 1º

1.5.02.03 Intensity-Position Monitor (target Media) 10-7 < 5 μm ±0.1° (pitch, yaw) ≤ 5 μm ±1° (pitch, yaw)

X: 10mm Y: 28mm 50 μm n/a 50 μm 1º 1º

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November 11-13, 200812


Intensity-Position Monitor


Space Constraints

CommonalityChamber

Stands

Stages


Common shaft mount for all monitor sensors



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November 11-13, 200813


Intensity-Position Monitor


PDR PM and Supports -Nov 08

Finalize Design PM –Dec 08

Finalize Support Design–Dec 08

FDR PM & Supports - Jan 09

Drawings -March 09

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November 11-13, 200814


SlitsPurpose:

Defines the beam size & position

Clean up scatterings (halo) around beam perimeter

Specifications:Can withstand full LCLS flux – unfocused

Minimize background scatter from blades


VacuumTorr

Vibration Amplitude

( freq > 1 Hz )


( freq > 1 Hz )


Stability (days)


theoretical beam

Translation range




RollStability

1.5.03.03 Slit System Coarse 10-7< 0.2 μm ±0.5° (roll) ≤ 5 μm ±1° (pitch, yaw, roll) 16 mm

2 μm

2 μm

2 μm 1º

1.5.03.03 Slit System Precise 10-7< 0.1 μm ±0.5° (roll) ≤ 5 μm ±1° (pitch, yaw, roll) 16 mm

1 μm reqd0.5 μm goal

1 μm reqd0.5 μm goal

1 μm reqd0.5 μm goal 1º

High-ZLow-Z

High-Z

Pink beam

Mono beam

D=3 mm

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November 11-13, 200815


Slits

ChallengesPrecise Motion

Space Constraints

Vendor performance capabilities have been put into question

SolutionsAvailable 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.

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November 11-13, 200816


High-ZLow-Z

High-Z

Pink beam

Mono beam

D=3 mm

Slits


PDR -Nov 08

Finalize Design –Dec 08

FDR PM & Supports - Jan 09

Inspect loaned unit –Feb 09

Drawings -March 09

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November 11-13, 200817


Pulse Picker Design

* http://www.azsol.ch/

Si3N4 coating on bladeto reduce damage

PurposesSelect a single pulse or any sequence of pulsesReduce LCLS repetition rate to < 10 Hz

Specifications< 3 ms switching time< 8 ms in close/open cycle timeOnly for < 10 Hz operationWithstand full LCLS flux

ImplementationBased on a commercial mechanical teeter-totter*

Steel blade fully stops beamSi3N4 required to protect the steel blade

Capable of ms transient time Requires 100 m


VacuumTorr

Vibration Amplitude

( freq > 1 Hz )


( freq > 1 Hz )

Thermal Translationa

l Stability (days)


theoretical beam

Translation range




1.5.03.05 Pulse Picker 10-7 < 10 μm ±0.5° (pitch, yaw) ≤ 50 μm ±1° (pitch, yaw, roll) TBD 50 μm 50 μm 50 μm

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November 11-13, 200818


Pulse Picker

ChallengesBlade Coating

Space Constraints X < 300 mm

Minimize Z length

SolutionsBrazing schemes under study

Combined attenuator with Pulse picker device

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November 11-13, 200819


Pulse Picker


PDR PP and Supports -Nov 08

Finalize Design PP –Dec 08


FDR PP & Supports - Jan 09

Drawings -March 09

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November 11-13, 200820


Attenuator PurposeReduce incident X-ray flux

Sample damageDetector saturationDiagnostic saturationAlignment of optics and diagnostics

Attenuator SpecificationsMinimize wavefront distortion and coherence degradationWithstand unfocused flux108 attenuation at 8.3 keV105 attenuation at 24.9 keV3 steps per decade


Attenuator System

DeviceVacuum

Torr

Vibration Amplitude

( freq > 1 Hz )


( freq > 1 Hz )

Thermal Translationa

l Stability (days)


theoretical beam

Translation range




1.5.03.05 Pulse Picker 10-7 < 10 μm ±0.5° (pitch, yaw) ≤ 50 μm ±1° (pitch, yaw, roll) TBD 50 μm 50 μm 50 μm

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November 11-13, 200821


Attenuator System

ChallengesAvoid pneumatic actuators

Space Constraints X < 300 mm

Minimize Z length

SolutionsUse of actuators with stepper motors

Actuators meets envelope requirements

Reduce number of view ports

Combined attenuator with Pulse picker device

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November 11-13, 200822


Attenuator System


PDR Attn. and Supports -Nov 08

Finalize Design Attn –Dec 08


FDR Attn & Supports - Jan 09

Drawings -March 09

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November 11-13, 200823


Summary

Designs are progressing

Challenges have emergedVendor reputation

Space constraints in X and Z

Steps are being taken to overcome challenges

Documents

Eliazar Ortiz LUSI Diagnostics & Common [email protected] November 11-13, 2008 SLAC National Accelerator Laboratory 1 Diagnostics/Common Optics: