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TY - CONF AU - Meng, X.C. AU - Chen, H.B. AU - Gai, W. AU - Li, G.H. AU - Liu, J.S. AU - Liu, Y.H. AU - Shi, J. AU - Zheng, S.X. AU - de Sá, F.H. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Study of Beam Break Up in Irradiation Linacs J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - Many recent experiments of the irradiation linacs produced at Tsinghua University indicate that beam power is limited by beam break up (BBU). Limits exist while the beam current or the pulse width is increased. In this paper, we illustrate the bream break up (BBU) phenomenon in the cases of both the 10MeV travelling-wave linac and 10MeV backward travelling-wave linac. The higher order modes in the linacs are analysed and the wake fields are calculated both with theoretical analysis and numerical simulation. Also, the beam dynamics is studied on the basis of the wakefield results to find a BBU threshold in these structures. PB - JACoW CP - Geneva, Switzerland SP - 3767 EP - 3769 DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-THPAB031 UR - http://jacow.org/ipac2017/papers/thpab031.pdf ER -