2022 NSLS-II Strategic Plan - Brookhaven National Laboratory
NSLS Infrared - Brookhaven National LaboratoryHow Will NSLS-II Serve Infrared Science? Larry Carr,...
Transcript of NSLS Infrared - Brookhaven National LaboratoryHow Will NSLS-II Serve Infrared Science? Larry Carr,...
![Page 1: NSLS Infrared - Brookhaven National LaboratoryHow Will NSLS-II Serve Infrared Science? Larry Carr, Lisa Miller, Randy Smith NSLS Infrared and the NSLS-II design team. BROOKHAVEN SCIENCE](https://reader034.fdocuments.in/reader034/viewer/2022042105/5e83e4de99629a47641eaca2/html5/thumbnails/1.jpg)
BROOKHAVEN SCIENCE ASSOCIATESU.S. Department of Energy
Office of Basic Energy Sciences
Funded under contract: DE-AC02-98CH10886
How Will NSLS-II Serve Infrared Science?
Larry Carr, Lisa Miller, Randy SmithNSLS Infrared
and the NSLS-II design team
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Synchrotron Infrared Source Qualities
• High brightness– ~ 3 orders of magnitude higher than conventional “white” IR
spectroscopy sources.– Needed for throughput limited spectroscopy (microspectroscopy)
• Broad spectral coverage– everything from visible down to microwaves, though weaker at
long wavelengths.– Compatible with high-performance FTIR spectrometry.
• Pulsed output– 10s of picoseconds out to nanoseconds– Time-resolved spectroscopy / dynamics
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
High Brightness Enables Throughput Limited Techniques
Microscopy atdiffraction-limit
Spectroscopy of materialsunder extreme conditions:
• diamond anvil cells• complex cryostats & magnets
Very high (spectral) resolution(requires small collimating aperture)
r = f (2δν/ν)1/2 = 2 mmfor f = 20 cm, δν = 0.001 and ν = 20 cm-1
Restrictive angle of incidence• Grazing incidence• Attenuated total refl. (ATR)• Ellipsometry
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Worldwide Synchrotron Radiation Facilities for Infrared
NSLSBNL
ALSLBL
CAMDLSU
SRCUW
SRSDaresbury
CLSUSask
UVSORIMS
SPring-8
MAXLund
SoleilLURE
ESRF
SRRC
SSLS
(Australian)Monash
SLSPSI
BESSY II
ANKAFZK
DAΦNE
Elettra
HSLS
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Synchrotron Infrared Brightness
If electron energy issufficiently high (> 100 MeV)then IR brightness dependsonly on:
- beam current
- source size/emittance
- extraction aperture
10-4 10-3 10-2 10-1 100 101 102 103 104
0.1
1
10
Spe
ctra
l dis
tribu
tion
(dP
/dω)
Photon Energy [eV]
10-1 100 101 102 103 104 105 106
THz
( ) 31
~ ωρ
2 GeV
25 MeV
0.2 GeV
~ 2 meter bend
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
TSGM: 180-1200eV (1995)
TSGM: 7-288eV (1999)
SGM: 15-1200eV (1996)
TSGM: 100-900eV (1999)
NIM: 3-30eV (1998)
White
White
125µeV-600meV (1997)
A: 2.5meV-3.1eV (1999)B: 48-840meV (1998)
1.2-480meV (1987)
A: 2.5meV-2eV (1999)B: 2.5meV-2eV (1998)
NSLS VUV800 MeV
1000 mA at injection
SGM: 8-250eV (1996)
Recently Upgraded VUV/IR Beamlines
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
IR Performance of VUV Ring: 90x90mr Extraction
1 10 100 100010-9
10-6
10-3
100
B
right
ness
[W/c
m-1/(c
m2 -r
ad2 )]
Frequency [cm-1]
Ideal 700mA VUV-IR 700mA
10000 1000 100 10
Wavelength [µm]
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Infrared Performance: NSLS VUV Ring
2 4 6 8 100.1
1
10
100
NSLS U12IR"single beam"
intensity
synchrotron HiP Hg Arc
Sig
nal I
nten
sity
Frequency [cm-1]
0 5 10 15 20 25 30 350.994
0.996
0.998
1.000
1.002
1.004
1.006
Rat
io (1
00%
line
)
Frequency [cm-1]
100 1000
1
10
100
Relative SignalU10A Synch/Globar1 mm diam. aperture, f/4
Rat
io
Frequency [cm-1]
0 100 200 300 400 5000.95
1.00
1.05
BB (1200K globar) Synchrotron U10A
100% line comparison1 mm specimen aperture
Rat
io
Frequency [cm-1]
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Pulses for Time-Resolved Spectroscopy
• Synchronized M-L laser(<10 ps pulses)& VUV ring pulses(down to 300 ps).
• Need shortersynchrotron pulses(down to 100 fs, butany gain is useful)
140 160 180 200 220-2
0
2
4
6
8
10
Det
ecto
r si
gnal
Time [ns]
laser synchrotron
4 ns
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Existing IR Programs/Activities• Biological and Life Sciences
– vibrational microscopy/imaging of proteins and cell structures– bone mineralization osteoporosis/osteoarthritis– chemistry of diseased tissues at the cellular level
• Environmental and Space Sciences– vibrational microspectroscopy of soils and interplanetary particles
• Corrosion and Catalysis– grazing incidence spectroscopy of molecular layers on metal surfaces
• Geosciences– spectroscopy and microscopy of molecular solids and minerals at extreme
pressures and temperatures.• Materials
– infrared conductivity of complex metal oxides.– dynamics (time-resolved) in superconductors and nanomaterials.– spectroscopy of spins and magnetic resonances in ordered solids.
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Infrared Considerations for NSLS-II
• Existing NSLS & VUV/IR Ring– high current (high brightness), ~ 1 ns duration pulses– ~ 25 years old (increasing maintenance for linac, booster, RF systems)– ring chamber and magnets remain reliable
• NSLS-II: New Ultra-Bright Storage Ring for X-rays– 500 ma (top-off)– new injector– 500 MHz
• at least 10X shorter bunches– but large aperture ports could be problematic
• estimate 20 mrad from geometric considerations.
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
1 10 100 1000
10-9
10-6
10-3
100
Brig
htne
ss [W
/cm
-1/(c
m2 -r
ad2 )]
Frequency [cm-1]
Ideal 700mA VUV-IR 700mA NSLS-II 500mA
Infrared on the NSLS-II Main Ring?
10 100 10000.0
0.5
1.0NSLS-II / VUV-IR
Rel
ativ
e B
right
ness
Frequency [cm-1]
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Plan: Relocate VUV/IR to NSLS-II: Infrared Ring
• Maintain investment in ring chamber, magnets andbeamline front-ends
• NSLS-II -> new injector (Linac)– Top-off injection for IR too
• can tolerate modes with shorter lifetimes– brighter mid-IR beam– higher average current (1 A)– short bunch lattice
• New RF– 500 MHz to match NSLS-II systems
• intrinsically shorter bunches (10s of picoseconds)• possible coherent mode?
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
The NSLS-II Project
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
NSLS-II Infrared Ring
Option 1:200 MeV linac + BoosterInject IR ring at 200 MeV
Option 2:3 GeV linacInject IR Ring at up to 800 MeV
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Infrared Brightness Comparison
1 10 100 100010-9
10-6
10-3
100
B
right
ness
[W/c
m-1/(c
m2 -r
ad2 )]
Frequency [cm-1]
VUV t/o 1000mA VUV-IR 700mA NSLS-II 500mA
10000 1000 100 10
Wavelength [µm]
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
SGM: 8-250eV (1996)
NIM: 3-30eV (1998)
White
White
1.2-480meV (1987)
A: 2.5meV-2eV (1999)B: 2.5meV-2eV (1998)
NSLS VUV800 MeV
1000 mA atinjection
A: 2.5meV-3.1eV (1999)B: 48-840meV (1998) 125µeV-600meV (1997)
Possible Infrared Beam Ports
Chamber modificationfor a U16IR Far-IR port(magnetospectroscopy)
Chamber modificationfor a U7/8 extendedsource (imaging arraymicroscopy)
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Two 25 mrad by 100 mrad ports
Extended Source for Small Array FTIR Microspectrometer
• Rapid scan FTIR with 16 element array detector
• Full spectral range MCT
25µm
25µm
Detector schematic
Perkin-Elmer “Spotlight”IR microscope with linear detector array
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Rough / Strawman Elevation Drawings
Linac below grade to use earth shielding
Main NSLS-II RingMain NSLS-II Ring(cross section)(cross section)
Infrared RingInfrared Ring
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Rough Infrared Ring and Beamline Strawman / Schematic
• Infrared beamlines extract light from ring (below grade)
• Endstations on upper level (stable concrete support)
• Most of ring covered (additional useful floor space, walkways)
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Other Possibilities: Coherent Emission
• Abo-Bakr et al demonstrate stable coherent emission from BESSY II (PRL March 2003)
• Berkeley Lab proposal for CIRCE (storage ring primarily for coherent far-IR)
Incoherent@ 1000 ma
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BROOKHAVEN SCIENCE ASSOCIATES
National Synchrotron Light Source U.S. Department of EnergyOffice of Basic Energy Sciences
Summary & Questions
Current plans call for relocating NSLS VUV/IR Ring to NSLS-II• Space for additional ports and beamline endstations
– Let’s make sure it’s all stable!• beamline hutches for environment stability?
– extended source based on 200 mrad horizontal (two U10 or U2 ports)?New Imaging Capability
• Top-off mode for higher current and higher brightness– how often?, how stable?
• 500 MHz RF– shorter bunches … modes for very short?– coherent emission?
• At least 200 MeV– adequate for IR and Visible, but may need more to avoid excessive topping-off– higher energy -> undulators could serve as tunable pump for time-resolved