1 BROOKHAVEN SCIENCE ASSOCIATES Abstract NSLS-II Performance and Magnet Lattice S. Krinsky, NSLS-II Project In this presentation, we introduce the NSLS-II storage ring magnet lattice and review the basic machine performance parameters. In particular, we discuss the requirements on dynamic aperture necessary to achieve acceptable injection efficiency and Touschek lifetime. The tight specifications on the harmonic content of the magnetic fields in the NSLS-II multipole magnets have been set to assure sufficient dynamic aperture not only for the bare NSLS-II lattice but also to leave room in the nonlinearity budget for the installation of 27 or more insertion devices to serve as the sources for the user research programs. *Work performed under auspices of the United States Department of Energy, under contract DE-AC02-98CH10886
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1 BROOKHAVEN SCIENCE ASSOCIATES Abstract NSLS-II Performance and Magnet Lattice S. Krinsky, NSLS-II Project In this presentation, we introduce the NSLS-II.
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1 BROOKHAVEN SCIENCE ASSOCIATES
Abstract
NSLS-II Performance and Magnet Lattice
S. Krinsky, NSLS-II Project In this presentation, we introduce the NSLS-II storage ring magnet lattice and review the basic machine performance parameters. In particular, we discuss the requirements on dynamic aperture necessary to achieve acceptable injection efficiency and Touschek lifetime. The tight specifications on the harmonic content of the magnetic fields in the NSLS-II multipole magnets have been set to assure sufficient dynamic aperture not only for the bare NSLS-II lattice but also to leave room in the nonlinearity budget for the installation of 27 or more insertion devices to serve as the sources for the user research programs. *Work performed under auspices of the United States Department of Energy, under contract DE-AC02-98CH10886
2 BROOKHAVEN SCIENCE ASSOCIATES
NSLS-II Performance and Magnet Lattice
Samuel KrinskyNSLS-II Accelerator Physics Group Leader
NSLS-II Magnet Production Workshop April 11-12, 2012
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Beam Property GoalHorizontal emittance (nm-rad) <1Vertical emittance (nm-rad) 0.010Average current (mA) 500Straights for insertion devices 27Orbit stability (% of beam size) 10Touschek lifetime (hrs) >3Top-off injection frequency (/min) <1
Some Basic NSLS-II Project Goals
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Technical Requirements & SpecificationsEnergy 3.0 GeVCircumference 792 mNumber of Periods 30 DBALength Long Straights 6.6 & 9.3mEmittance (h,v) <1nm, 0.008nmMomentum Compaction .00037Dipole Bend Radius 25mEnergy Loss per Turn <2MeV
Energy Spread 0.094%RF Frequency 500 MHzHarmonic Number 1320RF Bucket Height >2.5%RMS Bunch Length 15ps-30psAverage Current 500maCurrent per Bunch 0.5maCharge per Bunch 1.2nCTouschek Lifetime >3hrsTop-Off Injection rate 1/min
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Injection System
Local Control Room
Linac
Tunnel
Klystron Gallery
Equipment Racks for Linac and LTB line
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Storage Ring
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Storage Ring Cell Configuration
• 10 quadrupole magnets per cell, independent power supplies (initially 4 quads in the matching section)
† For canted IDs/FEs, ( ) shows canting angle in mrad * Depending on location within ID straight section** Off-center canting magnet location in IDstraight section
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ID Field Error Comparison
SLS Alba ESRF SOLEIL NSLS-II(DW) NSLS-II (Und)
By First Integral [G.cm] 20(<1cm) 30 40 2050 (|y|=0) 100(|y|=3mm) 50
Bx First Integral [G.cm] 7 4030 (|y|=0) 60(|y|=3mm) 30