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000301839 0247_ $$2datacite_doi$$a10.3204/PUBDB-2016-02908
000301839 037__ $$aPUBDB-2016-02908
000301839 041__ $$aEnglish
000301839 0881_ $$aDESY-M-00-04; C00-06-26.2
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000301839 1001_ $$0P:(DE-HGF)0$$aRobin, D.$$b0$$eCorresponding author
000301839 1112_ $$aThe 7th European Particle Accelerator Conference EPAC 2000$$cVienna$$d2000-06-26 - 2000-06-30$$gEPAC 2000$$wAustria
000301839 245__ $$aEnhanced Performance of the Advanced Light Source Through Periodicity Restoration of the Linear Lattice
000301839 260__ $$aHamburg$$bDESY$$c2000
000301839 300__ $$a136-140
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000301839 520__ $$aAn essential feature of third generation storage ring based light sources is the magnetic lattice is designed with a high degree of periodicity. Tracking simulations show that if the periodicity is perturbed (by focusing errors for example), non-linear resonances become excited, which causes a reduction in the dynamic aperture. Therefore it is important to have a method to measure and correct perturbed periodicity.In this paper we study the effect of broken and restored periodicity at an actual third generation light source: the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory. First we show that it is possible to accurately determine the storage ring optic and thus theperturbation of the periodicity by fitting measured orbit response matrices. This method allows us to determine individual field gradient errors in quadrupoles and closed orbit errors in sextupoles. By varying individual quadrupole field strengths it is possible to correct the optic, largely restoring the lattice periodicity. A comparison is made of the performance of the ALS before and after the optic is corrected. Measurements of the electron beam tails and the synchrotron light image reveal a large suppression in resonance excitation after the optic is corrected. Correcting the optic also improves the injection efficiency and lifetime.
000301839 536__ $$0G:(DE-H253)POF1-HGF-No-Prog-20130405$$aNo facility / HGF program None (POF1-890)$$cPOF1-890$$x0
000301839 588__ $$aDataset connected to INSPIRE
000301839 650_7 $$2INSPIRE$$atalk: Vienna 2000/06/26
000301839 650_7 $$2INSPIRE$$aelectron: storage ring
000301839 650_7 $$2INSPIRE$$asynchrotron radiation: particle source
000301839 650_7 $$2INSPIRE$$amagnetic field: error
000301839 650_7 $$2INSPIRE$$astorage ring: lattice
000301839 650_7 $$2INSPIRE$$asymmetry: lattice
000301839 650_7 $$2INSPIRE$$abeam optics: correction
000301839 650_7 $$2INSPIRE$$abeam monitoring: beam profile
000301839 650_7 $$2INSPIRE$$aBerkeley ES
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000301839 7001_ $$0P:(DE-HGF)0$$aSteier, C.$$b1
000301839 7001_ $$0P:(DE-HGF)0$$aSafranek, J.$$b2
000301839 7001_ $$0P:(DE-H253)PIP1002733$$aDecking, W.$$b3$$udesy
000301839 7870_ $$0PUBDB-2016-02907$$aDecking, Winfried$$dHamburg : DESY, 2000$$iIsPartOf$$rDESY-M-00-04; C00-06-26.2$$tContributions to the 7th European Particle Accelerator Conference EPAC 2000
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