1 brookhaven science associates nsls-ii overview satoshi ozaki director, accelerator systems...

1 BROOKHAVEN SCIENCE ASSOCIATES

NSLS-II Overview

Satoshi OzakiDirector, Accelerator Systems Division

NSLS-II Project

March 27, 2007


Synchrotron radiation light sources: Intense source of Light, IR to X-ray The remarkable tools that were developed over the past 30 years

for visualizing the micro-world: crystal, molecule, DNA, etc Micro-fabrications, etc

however, none of today’s light sources (anywhere in the world) were designed to probe materials with 1 nanometer spatial resolution and with 0.1 meV energy resolution with sufficient intensity

The Mission for NSLS-II

Our Mission is to build a highly optimized X-ray synchrotron radiation facility, delivering:

extremely high brightness and flux;exceptional beam stability; anda suite of advanced instruments, optics, and detectors that capitalize on these special capabilities

Together, these enable: ~ 1 nm spatial resolution ~ 0.1 meV energy resolution, and single atom sensitivity


Architectural Rendering of the NSLS-II Building


Layout Plan of the Facility


Accelerator System Configuration (1)

• Pre Injector: 200 MeV S-band Linac operating at 3 GHz- Linac tunnel + Klystron gallery

• Linac-to booster beam transfer line with two critical devices

• Booster synchrotron: 3 GeV (upgradeable to 3.6 GeV) - Booster tunnel: ~180 m in circumference- 10 n Coulomb per cycle- Top-off operation: ~1 cycle per minute- Test and tuning operation: ~1 Hz (Interruptible if needed)- Separate booster tunnel and service building

• Booster to storage ring beam transfer line with two critical devices


Accelerator System Configuration (2)

• Storage Ring: • ~780 m in circumference • 3 GeV, 500 mA 1%• Upgradeable to 3.6 GeV and/or 700 mA• Top-off injection to achieve better than 1% beam current variation

for the heat load stability• Double bend achromatic lattice with 30 straights for beam injection,

RF and insertion devices• Ultra-small emittance (x, y) :

– Bare Lattice: ~2 nmrad Horizontal & ~0.01 nmrad vertical– Baseline: ~1 nmrad horizontal & ~0.008 nmrad vertical– Fully built-out: ~1/2 nmrad horizontal, ~0.008 nmrad vertical

• Estimated beam life-time: 2 – 3 hours • High level of reliability and stability of operation


Injection System Layout (Preliminary)


Storage Ring and the Ratchet Wall


Tunnel Cross Section at the Narrowest Points

1 m thick roof, normal noncrete

Earth berm inside of the ring to the top of tunnel roof

Experimental hall

Power supplies and service equipment gallery

Beam line

Tunnel: 2.75 m high & 3 m wide at the narrowest point. Stay clear zone: 2 m high & 1.5 m wide


CAD Picture of Storage Ring Configuration

Insertion device installed

Insertion device being transported

Beam shutter

Front end

Tunnel wall thickness varies depending on the distance to the center of the stored beam


NSLS-II Beamlines

• Beamlines: High brightness sources from IR, UV to hard x-ray• 3 to 5 pairs of wide gap dipoles for infra-red beams• Regular bending magnets for soft X-rays• Up to 20 three pole wigglers for hard X-ray beams • 19 straight sections for undulators for high brightness hard X-ray

beam lines • 8 straight sections for damping wiggler (each 7 m long) high power

beam lines

• Altogether the NSLS-II can have at least 57 beamlines• More by canting multiple IDs per straight• Multiple hutches/beamline are also possible to increase the number

of experimental stations


Overall construction Schedule


Current Status and Future Upgrades

Current Status:

• NSLS-II team was successful in presenting the CDR of the facility to the DOE Review in November 2006

• CD-1 approval is expected in May of this year

• Presently we have stepped up our efforts on advanced conceptual design and preliminary design of the facility for the CD-2 review now scheduled in November of this year

Future Upgrades:

• Increase energy (3.5 GeV) and/or current (700 mA)• Is the shielding design adequate?

• As a long-term upgrade, a possibility of operating NSLS-II in an ERL mode is not precluded


NSLS-II Brightness


NSLS-II Flux

1 brookhaven science associates nsls-ii overview satoshi ozaki director, accelerator systems...

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