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TY - UNPB AU - Lyndaker, A. AU - Barrett, S.T. AU - Temnykh, A.B. ED - Casas, Joan ED - Schaa, Volker RW ED - Costa, Isidre ED - López, David ED - Prieto, Montserrat TI - Development of a Vertically Focusing Combined Function Dipole Magnet for Chess-U J2 - Proc. of MEDSI2016, Barcelona, Spain, 11-16 September 2016 CY - Barcelona, Spain T2 - Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation Conference T3 - 9 LA - english AB - There is an on-going major upgrade program for the Cornell High-Energy Synchrotron Source (CHESS) to boost the photon beam brilliance by an order of magnitude. In this project upgrade, dubbed CHESS-U, approximately an 80 meter section of the Cornell Electron Storage Ring (CESR) will be replaced by 12 compact double-bend achromats (DMA’s) to lower electron beam emittance by a factor of three. The critical element in the achromat is a 2.3 meter long combined function (CF) dipole magnet which has a curved geometry. In this cost-effective and transversely compact design, the magnet has a "C-shape" laminated core of dimensions 260 x 412 mm and with a tapered pole shape. This vertically focusing bending magnet will produce a nominal field of 0.651 T and a gradient of 9.365 T/m. A short, 37 cm CF dipole magnet prototype was constructed and is presently being tested. In this paper, design considerations, fabrication techniques, and assembly methods of the CF magnet are discussed. Characterization results of the 37 cm CF prototype magnet will also be presented. PB - JACoW Publishing CP - Geneva, Switzerland ER -