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TY - CONF AU - Liu, Z.K. AU - Chang, F.Y. AU - Chang, L.-H. AU - Chang, M.H. AU - Chang, S.W. AU - Chen, L.J. AU - Chung, F.-T. AU - Lin, M.-C. AU - Lo, C.H. AU - Wang, Ch. AU - Yeh, M.-S. AU - Yu, T.-C. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Determination of the Electron Bunch Length With Third Harmonic Cavity for the Taiwan Photon Source J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - The Taiwan Photon Source (TPS) is a modern 3 GeV low emittance light source with RMS bunch lengths of about 3 mm at a beam current of 500 mA and operating gap voltage of 3.2 MV. With a higher harmonic cavity, we could increase the Touschek lifetime and lower the heat load of in-vacuum undulators by lengthening the bunch lengths. Preliminary studies show that for full and uni-form fill patterns, the bunch lengths could be increased by a factor of four. However, this calculation ignores phase transient effects and may overestimate the effect of harmonic cavities. A multi-bunch, multi-particle tracking method has been developed to determine the bunch lengths for non-uniform fill patterns, which also takes phase transient effects into account and the expected maximum bunch lengthening factor for different TPS operation conditions are discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3745 EP - 3747 KW - cavity KW - operation KW - simulation KW - SRF KW - electron DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-THPAL045 UR - http://jacow.org/ipac2018/papers/thpal045.pdf ER -