Transcript CXI Instrument

Coherent X-ray Imaging Instrument
Sébastien Boutet
CXI Instrument Scientist
June 9, 2009
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
Outline
Update since the last FAC
KB mirrors
New CXI layout
Sample Chamber/KB mirror integration for
the 0.1 micron focus
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
Coherent Diffractive Imaging of Biomolecules
One pulse, one measurement
Particle
injection
LCLS
pulse
Noisy diffraction
pattern
Wavefront
sensor or
second
detector
Combine many measurements into 3D dataset
Data Frames
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
Combined Data Set
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Reconstruction
Sébastien Boutet
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CXI Instrument Location
Near Experimental Hall
AMO
SXR
X-ray Transport Tunnel
XPP
XCS
CXI
Endstation
Source to Sample distance : ~ 440 m
Far Experimental Hall
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
Far Experimental Hall
CXI Control
Room
XCS Control Room
Lab Area
Hutch #6
X-ray Correlation Spectroscopy
Instrument
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
Coherent X-ray Imaging
Instrument
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Sébastien Boutet
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CXI Instrument Overview
Particle injector
Detector Stage
(upstream position)
Sample Chamber
Detector Stage
(back position)
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
Precision
Instrument Stand
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CXI KB Mirrors
CXI has two sets of KB mirrors to produce a 1 micron beam and a 0.1 micron
beam
Discussed at last FAC
Coating
45 degree geometry
Update
Apply single coating strip (SiC)
But leave space for at least another strip for later
The 45 degree geometry was abandoned
Benefits were not worth the risks
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
New CXI Layout
Discussed at last FAC
Put both sample chambers in series and have each KB system focus at
different planes
Put KB1 system first and focus past the KB0.1 system
Place Be lenses between the 2 sample chambers to refocus the 100 nm
beam into the second sample chamber
Keep ability to use the unfocused beam
Update
The new layout was implemented
The unfocused beam can be used in the 1 micron Sample Chamber
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
CXI with 1 micron and Unfocused Beam
Diagnostics/
Common Optics
Diagnostics &
Wavefront Monitor
1 micron Sample
Environment
1 micron KB
Reference Laser
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
CXI with 0.1 micron Beam
Diagnostics/
Common Optics
Wavefront Monitor
0.1 micron KB &
Sample Environment
1 micron KB
Reference Laser
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
New Layout Advantages
Allows serial experiment configuration
Allows separation of mirror vacuum
Allows the use of a thin window to separate KB0.1 mirror
vacuum from 0.1 micron sample chamber
Allows the second chamber to be removed without
disturbing the mirrors
Allows a user chamber to be attached if needed
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
CXI 0.1 µm KB Mirrors/Sample Environment
Purpose
Produce a ~100 nm focus
Focal lengths
0.9 m for M1
0.5 m for M2
Requirements
Identical to 1 micron KB System in every way except for the mirror curvature
Integrated system with 0.1 micron Sample Chamber due to close proximity
Extend vacuum enclosure by ~600 mm for sample area
Separate both parts of the vacuum enclosure with valve and window
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
0.1 micron KB/Sample Chamber
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
0.1 micron KB/Sample Chamber
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
0.1 micron KB/Sample Chamber
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
Custom Valves
2 custom valves will be used
First one will hold vacuum in order to vent the Sample
Chamber
Second valve will have a very thin x-ray transmissive
window to separate UHV in KB tank from poor vacuum
(~10-7 Torr) in Sample Chamber
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]
Summary
The CXI KB mirrors will use a SiC coating strip
Space will be left available for another coating strip once some LCLS
experiments have occurred
Use 2 sample chambers
One for each KB mirror pair
CXI abandoned the 45 degree KB mirror configuration
Maintain the ability to use the direct unfocused beam into the 1 micron
Sample Chamber
The 0.1 micron KB/Sample Chamber System will utilize custom valves
to allow venting of the Sample Chamber and a thin window to separate
the vacuum of the mirrors from the sample
Coherent X-ray Imaging Instrument
FAC Meeting, June 9 2009
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Sébastien Boutet
[email protected]