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TY - CONF AU - Levichev, E.B. AU - Baranov, G.N. AU - Sinyatkin, S.V. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Use of Nonuniform Magnets for Emittance Reduction J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - We study a theoretical minimum emittance (TME) for a non-uniform bending magnet including a three-step bend (sandwich magnet), a dipole with linear ramp of the bend-ing radius and the same but with a central segment of constant field. We derive expression for the minimum emittance and expand it into a power series with respect to the bending angle. A zero-order term naturally gives the uniform magnet TME while higher-order terms are responsible for the emittance reduction. Theoretical re-sults are verified by numerical simulation. PB - JACoW CP - Geneva, Switzerland SP - 3014 EP - 3016 KW - emittance KW - lattice KW - dipole KW - simulation KW - radiation DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-WEPOY016 UR - http://jacow.org/ipac2016/papers/wepoy016.pdf ER -