SSRL: A Vision for the Future
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Transcript of SSRL: A Vision for the Future
SSRL: A Vision for the Future
Joachim Stöhr, SSRL Director
SSRL 32nd Annual Users' MeetingOctober 17, 2005
• Present status
• Management vision and goals
• Future scientific opportunities and facilities
Present Status
SPEAR3: A State-of-the-art 3rd Generation X-ray Source
Shanghai LS: 3.5Diamond (UK): 3.0Australian LS: 3.0Canadian LS: 2.9Soleil (France): 2.5Swiss LS: 2.5
1.9 GeV ALS
7GeV APS
10.01 0.1 10 100
1020
1016
1012
Photon Energy (keV)
3 GeV, SPEAR3
New sources are in 2.5 – 3.5 GeV range:
SSRL Users Beam UptimeFebruary 3, 2005 - July 31, 2005
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36921 36949 36977 37005 37033 37061 37089
PERC
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Power Outage
Jan-05 Feb-05 Mar-05 Apr-05 May-05 Jun-05 Jul-05
SPEAR3 Performance
• Feb. 4 – Aug. 1, 2005 run delivered 95% of scheduled user shifts.
• 760 experimental starts on 19 beam line stations.
• 900 users were badged to perform experiments.
• User demand was 150% of available resources.
• 89% US users: Univ. (53%), Nat. Labs (29%), Industry (7%).
• 11% foreign users: Univ. (8%) , Labs. (3%).
FY 2005 Experimental Run Summary
FY 2006 Experimental Run
Dates: November 28, 2005 to August 7, 2006
holiday shutdown Dec. 23 (4 pm) – January 3 (8 am) but run extension August 1 – 7
provides 3 more days and availability of 7 more BLs
BLs 7-1, 7-2, 7-3 are being totally rebuilt and will come up in February
Bl 4-2: SAXS camera & software BL 6: K-B and TXRF system
SSRL Facility Upgrades
• State-of-the-art 3rd generation storage ring
• Most beam lines operational
• Extremely reliable operation at 100 mA
• Ring test of 500 mA operation successful – beam in BL 6
• Upgrade of insertion device lines toward 500 mA operation to be completed by end 2006
• Upgrade of bending magnet beam lines by 2007
…but even with completion of upgrade program
• Full science potential of SPEAR3 will not have been realized
SPEAR3 - Present Status and BL Upgrades
talks tomorrow byBob Hettel &Tom Rabedeau
Vision and goals
Director’s Statement
I want SSRL to be known for :
• Its world-class science
• Its caring for employees and users safety
• Its value to DOE and other stakeholders (e.g. NIH)
• Its importance within SLAC and Stanford
The New SSRL Directorate
SSRL’s Future Role within SLAC
One of three pillars of photon science program at SLAC
SSRLLCLS
SSRL program can maintain vitality for more than 10 years
Science programs complementary to LCLS
Important part of research in Centers is linked to SSRL
Significant additional scientific opportunities exist
Challenge is: Full utilization of SPEAR3 capabilities Identification of new opportunities Funding of new facilities
Centersof
Excellence
Ultrafast Center
X-Ray Lab. of Advanced Mat.
…….
SSRL administrative plans:
• Create “Scientific Advisory Committee” (SAC) in addition to “Proposal Review Panel” (PRP) SAC formation nearly complete
• Review recruiting and retention (career) issues of staff scientists. Task force to make recommendations
Charge drafted
SPEAR3 - Opportunities and New Facilities
• Opportunities identified over last 3 years by: SSRL scientific staff, users and faculty
• Plan supported by outside committee and by SSRL PRP chaired by S. Sinha (UCSD) and R. Chianelli (UTEP, also PRP Chair)
• List expanded by discussions within directorate / faculty
First implementation stage has 3 year horizon (next DOE review in 2008)
Funded and in process:• Structural Molecular Biology BL 12 (Caltech funded)• Soft X-Ray Facility BL 13 (DOE funded)• Hard X-Ray Microscope - TXM (NIH funded)
Proposals to DOE-BES 2005:• High Resolution Photoemission BL (under review)• Small Angle X-Ray Scattering BL (end of year)• Nanoscale Dynamics Research (end of year)
In planning: • Superconducting in-vacuum undulator source (Stanford (donor) / DOE) - inelastic x-ray scattering station - hard x-ray microscopy (STXM) station
Other - capture new opportunities:• e.g. high-throughput SMB bend beam lines
SPEAR3 - New Facilities
Existing Beam Lines• 7 IDs – in blue color • 4 bends – in red color 27 experimental stations, 23 operate simultaneously
BLs under construction:BL12: Macromolecular crystallography BL in-vacuum undulator. Moore gift to Caltech ($12.4M to SSRL) - Q1/07BL13: Soft x-ray nanoscience BL variable polarization undulator – microscopy , coherent scattering, spectroscopy funded by DOE-BES - move from BL5 in ‘07
BL13
IDBL12
Easy-access new source points (ID and B)• 2 – 1.5 m ID - small gap ( one used for BL12) • 2 - 3.8 m ID ( one used for BL 13 )• 2 - 2.3 m ID• 3 - bends
SPEAR3 – Beam Lines and Expansion Capacity
Possible number of stations• 19 IDs • 17 bends
Funded beam lines – in process
Funded through Moore Foundation gift to Caltech
In-vacuum small gap undulator - on order
KB focusing optics, beam size - 20 µm x 200 µm
Microdiffractometer for micro-crystal studies
Protein Crystallography BL12
• Installation of ID and beam line in 2006 shutdown
• PRT beam line with 60% general user time
Funded DOE Proposal
Soft X-ray BL 13 with 3 Endstations
EPU SGM
STXM
Coherent, ResonantX-ray Scattering
Nanoscience, environmental science, chemistry and biology
To be moved from BL 5-2 - fall 2007
Adv.Spectrosc.
SPECKLE
STXM
SPECKLE
Spectroscopy
slit
reflectiveCondenser
MZP
CCD
Si(Li)
x
y
BL 6-2
spatial resolution: 20 nm
Energy: 3 keV – 14 keV
2D and 3D Imaging
Fluorescence microprobe integral
Various contrast modes: absorption contrast, Zernike phase contrast
Hard X-Ray Microscopy Facility on BL 6-2
Beam line proposals 2005
New ARPES Branch on Beam Line 5
New EPU sourceHigh resol. plane grating mono < 150 eVARPES endstation
New SAXS-WAXS Bending Magnet Beam Line
bend magnetbetweenbeamlines4 and 5
focusingmirror (h & v)
mono:multilayers& Si(111)
SAXS detectorin 5m flight path
Sample environments:- furnace to ≈800 oC- multi-sample holder (≈12) up to 200 oC- stopped-flow cell- chamber for windowless SAXS- space for optics instrumentation- heated shear cell- grazing incidence-SAXS chamber
WAXSdetector
• Focused ~ 1x1012 h/s• E = 5.9 - 20 keV• 0.1 x 0.1 mm2 focus on detector• SAXS: Q ≈ 0.001 – 0.5 Å-1 • WAXS: Q ≈ 0.5 – 6 Å-1
Proposal to DOE – late 2005 : Cost ~ $ 3.0 million
slits: h & v
Nano-scale Dynamics – Combining Focusing with Time-resolution
• Conventional x-ray techniques: ensemble averages in space and time. intrinsic dynamics averages out
• Coherent x-rays (speckle): can measure fluctuations limited coherent flux
Goal: Direct observation of dynamics/fluctuations on nanoscale
• Science: dynamics and fluctuations in disordered systems, liquid crystals, supercooled liquids, phase transitions: glass transition, magnetic phase transitions….. excited state dynamics laser pump – x-ray probe nanocrystals, surfaces ...
• Time-scales from 100 picoseconds to seconds. pump with high rep-rate laser using full synchrotron rep-rate.
• Alternative method: focus to spot size ~ correlation length employ time-resolved detectors
Science proposal to DOE – late 2005
In planning –
2 BLs on superconducting in-vacuum undulator
– depends on donor fund drive
In-Vaccum Superconducting Undulator
Propose to use for 2 stations: Inelastic scattering and hard x-ray STXM microscope
both 1.5 m length
E0
ΔE = E0 - E’
E’
sample
e-
photonphoton
6400 6500 6600 6700 6800 6900 7000 7100
elastic peak
E0 [eV]
Compton peak
Raman scattering
ΔE ~ 200 - 1000 eV
Inte
nsit y
[lo
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a le ]
graphite
Inelastic X-ray Scattering Facility
Science: Bulk characterization of low Z materials
ambient conditions- systems with high vapor pressure, aqueous systems - carbonaceous systems (asphaltenes, coals)- Li-C batteries
extreme conditions- different phases of H2O - methane hydrates, N2, O2, CO, CO2, NO - hydrogen storage in nanotubes- superconductitivy (Li, oxygen)
• SSRL will remain a central and important part of “Photon Science” at SLAC
• SPEAR3 offers exciting new scientific opportunities • Their capture requires new state-of-the-art instrumentation / BLs
• Proposed facilities are matched to the external and in-house users
• Their funding and implementation will cover the timeframe > 2010
Future Challenges:
Improved operation of SPEAR3 – beam time, beam quality, safety
Funding to capture the identified opportunities– beam lines, instrumentation, staff
Summary