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TY - CONF AU - Li, C. AU - Gai, W. AU - Jing, C.-J. AU - Power, J.G. AU - Tang, C.-X. AU - Zholents, A. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Drive Beam Break-up Control and Practical Gradient Limitation in Collinear Dielectric Wakefield Accelerators J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Dielectric wakefield accelerator (DWA) concept has gained significant attention for the need of the future large scale facilities. For a practical machine, one needs to overcome a major challenge for the DWA that is the efficient energy extraction and stable propagation at the same time for the drive beam. Typically, a slightly off axis beam become unstable in the dielectric channel due to transverse wakefield excitation, that could be controlled if a strong external alternating magnetic focusing channel applied at the same time. However, there is limitation on the practical magnetic field in the focusing channel (typically < 1 Tesla), thus imposing operating point for the DWA. In this article, we explore the operating point of the DWA for various structure frequencies and drive beam charge, particularly on the gradient and total acceleration distance, and provide guidance on the DWA design. PB - JACoW CP - Geneva, Switzerland SP - 1443 EP - 1446 KW - wakefield KW - acceleration KW - simulation KW - linac KW - quadrupole DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-TUPME040 UR - http://jacow.org/ipac2014/papers/tupme040.pdf ER -