coherent x-ray imaging instrument
DESCRIPTION
Coherent X-ray Imaging Instrument. S ébastien Boutet CXI Instrument Scientist June 9, 2009. Outline. Update since the last FAC KB mirrors New CXI layout Sample Chamber/KB mirror integration for the 0.1 micron focus. Coherent Diffractive Imaging of Biomolecules. One pulse, one measurement. - PowerPoint PPT PresentationTRANSCRIPT
1 Sébastien [email protected]
1Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
Coherent X-ray Imaging Instrument
Sébastien BoutetCXI Instrument Scientist
June 9, 2009
2 Sébastien [email protected]
2Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
Outline
Update since the last FACKB mirrorsNew CXI layout
Sample Chamber/KB mirror integration for the 0.1 micron focus
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3Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
Coherent Diffractive Imaging of Biomolecules
Combine many measurements into 3D dataset
Noisy diffraction pattern
LCLS pulse
Particle injection
One pulse, one measurement
Wavefront sensor or second detector
Data Frames
Combined Data Set
Reconstruction
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4Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
CXI Instrument Location
XCS
AMO
CXIEndstation
XPP
Near Experimental Hall
Far Experimental Hall
X-ray Transport Tunnel
Source to Sample distance : ~ 440 m
SXR
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5Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
Far Experimental Hall
Coherent X-ray ImagingInstrument
CXI ControlRoom
Lab Area
X-ray Correlation SpectroscopyInstrument
Hutch #6
XCS Control Room
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6Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
CXI Instrument Overview
Sample Chamber
Detector Stage(back position)
Particle injector
LCLS Beam
Precision Instrument Stand
Detector Stage(upstream position)
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7Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
CXI KB Mirrors
CXI has two sets of KB mirrors to produce a 1 micron beam and a 0.1 micron beamDiscussed at last FAC
Coating45 degree geometry
UpdateApply single coating strip (SiC)
But leave space for at least another strip for laterThe 45 degree geometry was abandoned
Benefits were not worth the risks
8 Sébastien [email protected]
8Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
New CXI Layout
Discussed at last FACPut 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 chamberKeep ability to use the unfocused beam
UpdateThe new layout was implementedThe unfocused beam can be used in the 1 micron Sample Chamber
9 Sébastien [email protected]
9Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
CXI with 1 micron and Unfocused Beam
Diagnostics &Wavefront Monitor
1 micron SampleEnvironment
Diagnostics/ Common Optics
1 micron KB
Reference Laser
10 Sébastien [email protected]
10Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
CXI with 0.1 micron Beam
Diagnostics/ Common Optics
1 micron KB
Reference Laser
0.1 micron KB &Sample Environment
Wavefront Monitor
11 Sébastien [email protected]
11Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
New Layout AdvantagesAllows serial experiment configurationAllows separation of mirror vacuumAllows the use of a thin window to separate KB0.1 mirror vacuum from 0.1 micron sample chamberAllows the second chamber to be removed without disturbing the mirrors
Allows a user chamber to be attached if needed
12 Sébastien [email protected]
12Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
CXI 0.1 µm KB Mirrors/Sample Environment
PurposeProduce a ~100 nm focus
Focal lengths0.9 m for M10.5 m for M2
RequirementsIdentical to 1 micron KB System in every way except for the mirror curvature
Integrated system with 0.1 micron Sample Chamber due to close proximityExtend vacuum enclosure by ~600 mm for sample areaSeparate both parts of the vacuum enclosure with valve and window
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13Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
0.1 micron KB/Sample Chamber
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14Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
0.1 micron KB/Sample Chamber
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15Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
0.1 micron KB/Sample Chamber
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16Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
Custom Valves
2 custom valves will be usedFirst one will hold vacuum in order to vent the Sample ChamberSecond 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
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17Coherent X-ray Imaging InstrumentFAC Meeting, June 9 2009
SummaryThe 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 chambersOne for each KB mirror pair
CXI abandoned the 45 degree KB mirror configurationMaintain the ability to use the direct unfocused beam into the 1 micron Sample ChamberThe 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