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TY - CONF AU - Tsai, C.-Y. AU - Douglas, D. AU - Li, R. AU - Tennant, C. ED - Belomestnykh, Sergey ED - Hoffman, Caitlin M. ED - Schaa, Volker RW TI - Linear Microbunching Gain Estimation Including CSR and LSC Impedances in Recirculation Machines J2 - Proc. of ERL2015, Stony Brook, NY, USA, June 7-12, 2015 C1 - Stony Brook, NY, USA T2 - ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs T3 - 56 LA - english AB - It is known that microbunching instability (MBI) has been one of the most challenging issues with the design of magnetic compressor chicanes for FEL or linear colliders, as well as the transport lines for recirculating or energy recovery linacs. To more accurately quantify MBI in a single-pass or few-passes system and for more complete analyses, we extend our previously developed linear Vlasov solver* to incorporate more relevant impedance models, including transient and steady-state CSR and LSC impedances. Then the linearized Vlasov equation is numerically solved for the microbunching gain amplification factor. With application of this code to two specially designed transport arcs** and a circulator cooling ring design of MEIC at Jefferson Lab***, the resultant gain functions and spectra are presented and some results are compared with particle tracking simulation. We also discuss some underlying physics with inclusion of these collective effects. It is anticipated this more complete analysis can further improve the understanding of the MBI mechanisms and shed light on how to suppress or compensate MBI effects in such lattice designs. PB - JACoW CP - Geneva, Switzerland SP - 34 EP - 41 KW - lattice KW - impedance KW - electron KW - simulation KW - dipole DA - 2015/09 PY - 2015 SN - 978-3-95450-183-0 DO - 10.18429/JACoW-ERL2015-TUICLH2034 UR - http://jacow.org/ERL2015/papers/tuiclh2034.pdf ER -