SuperB Synchrotron Radiation Source Issues John Seeman SLAC Annecy SuperB Workshop March 16-19, 2010 Annecy SuperB Workshop

Annecy SuperB Workshop Tasks Compare to NSLS-II NSLS-II ring and beam line examples Potential HER synchrotron radiation beam lines at Frascati Potential LER synchrotron radiation beam lines at Frascati Expected SR power brightness and flux Tor Vergata possibilities Annecy SuperB Workshop

NSLS-II Technical Requirements & Specifications Energy 3.0 GeV Circumference 792 m Number of Periods 30 DBA Length Long Straights 6.6 & 9.3m Emittance (h,v) <1nm, 0.008nm Momentum Compaction .00037 Dipole Bend Radius 25m Energy Loss per Turn <2MeV Energy Spread 0.094% RF Frequency 500 MHz Harmonic Number 1320 RF Bucket Height >2.5% RMS Bunch Length 15ps-30ps Average Current 500ma Current per Bunch 0.5ma Charge per Bunch 1.2nC Touschek Lifetime >3hrs Krinsky Annecy SuperB Workshop

NSLS-II Lattice Functions for One Cell Krinsky Annecy SuperB Workshop

0.1 meV Development Instrument (10m) NSLS-II Inelastic X-ray Scattering Beamline Beamline Design, Baseline & Mature Scope BASELINE SCOPE: 1 meV spectrometer (5 m) with single analyzer Operates at E ~ 9.1 keV with the new optical scheme or a proven alternative Total energy resolution ~ 1 meV with improved resolution tail Scanned energy range: ~ 1 eV Incident flux at sample > 109 photons/sec/1meV (IVU22-3m) Q range / resolution: 0.1 ~ 40 nm-1 / ~ 0.1 nm-1 Focus: ~ < 5 µm (V) x 10 µm (H) High-β straight 2nd Undulator (IVU22-3m) Undulator (IVU22-3m) Defining Aperture & Absorber 1D Be Compound Refractive Lens Shutter 20m 40m Storage Ring Shield Wall 2nd Vertical Focusing Mirror Pre-monochromator Shutter 2nd Horizontal Focusing Mirror for High Q Resolution CDDW Monochromator Cai Shutter 0.1 meV Development Instrument (10m) 59m Vertical Focusing Mirror 69m CC Monochromator Horizontal Focusing Mirror For 0.1 meV Sample Phase Plate For Q > 40 nm-1 64m Multilayer Collimating Mirror MATURE SCOPE ADDITIONS: Undulator: 2nd IVU22-3m (Total: IVU22-6m) Channel-Cut Monochromator for 0.1 meV Phase Plate for Q > 40 nm-1 2nd Set of Focusing Mirrors for ΔQ ~ 0.01 nm-1 Sample Environments (not shown) 0.1 meV Development Instrument (10 m) CDDW Analyzer Detector 1 meV Spectrometer (5m) Annecy SuperB Workshop

NSLS-II Hard X-ray Nanoprobe Beamline Layout BASELINE Scientific Capabilities Beamline design capable of ~1nm spatial resolution Satellite building for environmental isolation and stability Initial Science Microscope at 10nm to 30nm Nano-XRF & XRD at 6~25 keV with MLL/FZP Optimized for final optic aperture up to ~150 mm Incident flux in final focal spot > 109 ph/s High source stability using secondary source aperture white beam slits storage ring wall IUV20 low beta Horizontal collimating mirror Horizontal Si(111) mono Pink beam slits 1D CRL lenses (transfocator) Horizontal focusing mirror *Upgrade to Vertical mirror system *Secondary source aperture 1, z=62m *High resolution mono Mature Scope Scientific Capabilities XRF at sub-10m~1nm using MLL Prototype Microscope. Addition of temperature control/cryo capability to the Science Microscope. Enable use of nanofocusing optics w/ large aperture for larger working distance by adding SSA1 at z=62m Replacement of 1D CRLs w/ mirror system for achromatic beamline optical configuration. Chu Remote Satellite Building Secondary source aperture 2 at z=94m MLL/FZP Multi-element XRF detector Annecy SuperB Workshop z=108m PAD for XRD/Ptychography sample

NSLS-II Sketch of the SRX-Beamline Annecy SuperB Workshop

NSLS-II Damping Wiggler (WBS1.03.07.01) NdFeB-PM with Side Magnets and Permendur Pole (width 80mm), lu=90mm, Gap=12.5mm, Symmetric magnetic field Vacuum Chamber Aperture Size 9.5mm (v) x 76mm (h) Conceptual Design Symmetic Field with 37 Full Strength Periods 36 Annecy SuperB Workshop

APS Proposal for NSLS-II Similar concept as LSLS undulator CAD Model Annecy SuperB Workshop

EPU Active Compensation (à la BESSY) Courtesy of J. Bahrdt Annecy SuperB Workshop

Elliptically Polarizing Undulator (EPU) (WBS1.03.07.03) Apple -II, lu=49mm, Gap=11.5mm ,2x2m Long (canted -0.08mrad:0.16mrad:-0.08mrad) Four Motors for Phase to achieve 180 degree rotation of linear polarization plane Vacuum Chamber Aperture Size 8.0mm (v) x 61mm (h) (tentative) BPM Button Canting Magnet Annecy SuperB Workshop

Undulator choice for NSLS-II Low beta, short straight section To serve both branches independently  two undulators, canted design Spectral flux at odd harmonics (by O. Choubar) Annecy SuperB Workshop

IVU Magnetic Performances and Acceptable Lengths IVU Parameters Geometry: Pole Width: 40 mm Pole Height: 25 mm Pole Thickness: 3 mm (for λu = 20 mm) Materials: Pole: Va Permendur NEOMAX Magnet: NdFeB, Br = 1.12 T Magnet Width: 50 mm Magnet Height: 29 mm Fundamental Photon Energy vs Gap for Different IVU Periods IVU Lengths ~Satisfying “Stay Clear” Constraint in High-Beta Straight Section IXS requirement O.Chubar βy0 = 3.4 m Annecy SuperB Workshop

Brightness---NSLS-II Annecy SuperB Workshop

Annecy SuperB Workshop Flux---NSLS-II SRW calculation by O. Chubar Annecy SuperB Workshop

NSLS-II Insertion Devices (02/10) Annecy SuperB Workshop

Annecy SuperB Workshop NSLS-II Tolerances Annecy SuperB Workshop

NSLS-II ID Field Error Comparison 1st & 2nd Integrals Cf. 3000 G.cm.cm corresponds to 3 microns in displacement at NSLS-II Insertion Device Integrated Multipoles Unit  Annecy SuperB Workshop

Annecy SuperB Workshop Frascati Site Annecy SuperB Workshop

1st Geological Survey Frascati Linac Tunnel Modulator Hall Transfer Lines Super-B Tunnel Annecy SuperB Workshop

1st Geological Survey Frascati Collider Hall Super-B Tunnel Annecy SuperB Workshop

Annecy SuperB Workshop Layout & geometry Biagini LER SR IP 66 mrad LER SR HER and LER arcs are parallel to each other in the H-plane while separated by 2.1 m. Each ring has one inner and one outer arc. Both inner and outer arcs provide the same bending angle but outer arc is made longer (increased drift space around the dipoles) in order to provide the same azimuth location as the inner arc LER arc LER arc HER arc HER arc Rings crossing e- e+ RF Annecy SuperB Workshop

Annecy SuperB Workshop Arcs HER and LER arcs have conceptually the same lattice. LER arc dipoles are shorter (bend radius about 3 times smaller) than in the HER in order to match the ring emittances at the asymmetric beam energies. Biagini LER HER mx = 3p, my = p Cell in HER mx = 3p, my = p Cell in LER Annecy SuperB Workshop

Annecy SuperB Workshop LER Spin Rotators 2 SR just before and after the FF 4 solenoids and 5 quadrupoles each Lower chromaticity Biagini Annecy SuperB Workshop

Annecy SuperB Workshop Injection arc cells Injection into rings is performed in one modified arc cell (very compact design) High horizontal beta for higher efficiency Kick needed is very small Having dispersion at injection septum actually helps Annecy SuperB Workshop

Frascati Site: Potential HER SR Beam Lines Need cross-overs Annecy SuperB Workshop

Frascati Site: Potential LER SR Beam Lines Need cross-overs Annecy SuperB Workshop

Annecy SuperB Workshop Roman Villa SPARX & SuperB CNR Sport City University Campus Tor Vergata Annecy SuperB Workshop

Annecy SuperB Workshop Site Geology Formed by the Colli Albani volcano more than 600000 years ago Very stable volcanic rock S.1 S.2 S.3 S.4 S.5 Soil Sea Level Altitude (m) Brown Pyroclastic Rock Gray Pyroclastic Rock Preliminary Annecy SuperB Workshop

Annecy SuperB Workshop Roman Villa Collider Hall SuperB LINAC SPARX Annecy SuperB Workshop 30

Annecy SuperB Workshop SR Conclusions Several possibilities exit for placing SR beam lines on SuperB. Need to find the best beam line locations. Need to insert zero dispersion cells into the lattice where undulators are needed. Need to calculate what the possible SR flux and brightness are. Need a beam line layout plan for the lines. Annecy SuperB Workshop