%0 Conference Paper
%A Bilani, Orkidia
%A Neumann, Paul
%A Schoeps, Andreas
%A Tripathi, Sumit
%A Vagin, Pavel
%A Vielitz, Thorsten
%A Tischer, Markus
%T Magnetic Tuning of FLASH2 Undulators
%C Geneva
%I JACoW, Geneva, Switzerland
%M PUBDB-2015-00050
%@ 978-3-95450-132-8
%P 1235-1237
%D 2014
%< Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany
%X The present fixed-gap undulator system for FLASH1 and the new FLASH2 undulators will share the same electron beam accelerator, thus 12 variable gap undulators are needed in order to provide radiation of different wavelengths to both experimental halls independently. Each of the 12 devices has a length of 2.5m. The magnet structure with a period length of 31.4mm provides a maximum field of 0.96T with an effective K-parameter of 2.81 at minimum gap. Phase, vertical and horizontal trajectories have been tuned based on Hall probe and stretched wire measurements. Remaining multipoles were optimized with moderate gap dependence by using magic fingers. At some magnet structures, shims were placed to correct gap dependent field integrals. All undulators have an rms vertical and horizontal trajectory flatness
%B International Particle Accelerator Conference IPAC
%C 15 Jun 2014 - 20 Jun 2014, Dresden (Germany)
Y2 15 Jun 2014 - 20 Jun 2014
M2 Dresden, Germany
%K Accelerator Physics (Other)
%K 07 Accelerator Technology Main Systems (Other)
%K T09 Room Temperature Magnets (Other)
%F PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
%9 Contribution to a conference proceedingsContribution to a book
%R 10.18429/JACoW-IPAC2014-TUPRO084
%U https://bib-pubdb1.desy.de/record/205486