Transcript SXR Instrument

SXR Instrument
Michael Rowen – Engineering Physicist
June 9, 2009
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Michael Rowen
[email protected]
Outline
SXR Consortium
SXR Instrument Configuration
End Stations
Funding-Spending
Schedule
Conclusions
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Michael Rowen
[email protected]
SXR Consortium
The SXR instrument is being built by a consortium formed
between Stanford University, the University of Hamburg,
CFEL (at DESY), LBNL, and the LCLS.
The instrument is a soft x-ray beam line capable of
monochromatic, “white” beam and spectrometer mode
operations.
SXR will be operated as a general user instrument.
Consortium members get a slight preference during early
operation only. All experiments will be handled through the
LCLS proposal process.
The end stations are to be supplied by users.
User may collaborate with any of groups with listed
endstations (http://lcls.slac.stanford.edu/sxr/SXRTechEndStations.aspx) or
propose their own systems.
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Michael Rowen
[email protected]
SXR Instrument
For overview see http://lcls.slac.stanford.edu/sxr/SXRTechOverview.aspx
Transmission
M1 Mirror
Single pulse
sample Chamber & Grating
shutter
System
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Exit slit &
Spectrometer Detector
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Photon
Stopper
K-B
End
Focusing Stations
Optics
(user
supplied)
Beam
Dump
Michael Rowen
[email protected]
Transmission Sample System:
The SXR Instrument will
have the capability to do
transmission experiments
utilizing the monochromator
as a spectrometer.
 Simple chamber just before mono.
 Sample introduction and
manipulator from top.
 Coaxial pump laser in-coupling.
 Two mirrors for 800 & 400nm
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Michael Rowen
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Monochromator
Varied Line Space (VLS) Plane Grating
Monochromator:
 Upright image-fixed exit slit.
 Operate in monochromatic
(& spectrometer mode)
&
 “White” beam mode
 Commercial mechanical system
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Michael Rowen
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Exit Slit Spectrometer Detector
Exit slit commercial:
Detector Design based on
XTOD Imaging Detector:
10 μm resolution required
2.5x2.5mm area imaged
Use 1024x1024 camera for 120Hz data
collection
Use XTOD Imaging Detector lens system
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Michael Rowen
[email protected]
Refocusing Optics
SXR to clone AMO K-B system:
SXR End Station spot
spec’ed at <10x10mm.
AMO K-B system has
tighter specs.
Cost savings by copying
AMO system.
Small modification
mirrors to accommodate
the different focal
lengths.
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Michael Rowen
[email protected]
Differential Pump & Coaxial Pump Laser
Between the focusing optics and the
end station there will be a differential
pump to allow operation of end stations
at up to 1x10-6 torr
Differential pump sections double as
collimators for beam containment.
There will be a mirror for coaxial
introduction of a pump or alignment
laser.
Two mirrors for 800 & 400nm
End Stations
Differential
Pumping
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Laser in-coupling mirror
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Michael Rowen
[email protected]
End Stations
End Stations proposed to date:
(http://lcls.slac.stanford.edu/sxr/SXRTechEndStations.aspx)
CFEL-ASG Multi-Purpose (CAMP), atoms to
nano-particles: Max-Planck ASG at CFEL
Surface Chemistry PES/XES/XAS: Stanford
Electron Beam Ion Trap (EBIT): MPI
Heidelberg & LLNL
Momentum Resolved X-ray Scattering:
Stanford & LBNL
Resonant Imaging: Stanford
Liquid Jet - Chemical Dynamics: CFEL,
MAX-lab & MPI Gottingen
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Michael Rowen
[email protected]
SXR Funding
Stanford:
$750k committed
$500k at SLAC
Remainder available as needed
LBNL:
$377k in kind design and engineering support
Hamburg/DESY:
$1800k committed
$1200k at SLAC
$300k due in May
$300k due in July
LCLS:
$1500k committed and at SLAC
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Michael Rowen
[email protected]
Hamburg/DESY/SLAC MoU & Funding
MoU signed off by all parties 2/24/09.
Approval to spend funds from Hamburg &
CFEL 4/29/09.
Processing the long lead requisitions as
quickly as possible.
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Michael Rowen
[email protected]
Costs-Spending
All major SXR procurements have been at
or below the budgeted amount.
The engineering effort has been on track
with the available funding.
So far we have been limited by slow arrival
funding and then spending approval.
Timely procurement of critical items is
critical to the schedule.
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Michael Rowen
[email protected]
Critical Procurements
Mono Optics:
Grating substrates delivered, QC’ed and at ruling vender
Ruled gratings due end September
M1 Mirror due late June
Coating at LLNL projected 4 weeks from availability gratings
Monochromator System:
Awaiting placement of order
Projected delivery late November
Exit Slit:
Order in process
Projected delivery mid December
K-B Mirrors:
Order in process
Projected delivery late November
Coating at LLNL projected 4 weeks from availability mirrors
Assembly at LBNL
K-B Mirror System:
To be built at LBNL (same group as doing the AMO K-B system)
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Michael Rowen
[email protected]
Summary SXR Schedule
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Michael Rowen
[email protected]
Conclusions
The SXR instrument is on a very tight schedule
Only <2 week float to final installations during the
January-February down.
The critical item is the monochromator as it is in the
1st hutch.
The critical path item are the K-B mirrors in the 2nd
Hutch.
The funding hurdles are past.
There are no show stoppers at this time.
SXR should be ready for beam by the end of
February 2010.
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Michael Rowen
[email protected]
End Presentation
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Michael Rowen
[email protected]