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TY - CONF AU - Sakaue, K. AU - Koshiba, Y. AU - Kuroda, R. AU - Mizugaki, M. AU - Takatomi, T. AU - Urakawa, J. AU - Washio, M. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Ultra-short Electron Bunch Generation using Energy-chirping Cell Attached RF Electron Gun J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - We have been developing an Energy-Chirping-Cell attached RF electron gun (ECC-RF-Gun) for generating ultra-short electron bunches. ECC-RF-Gun has extra cell at the end of gun cavity in order to chirp the bunch energy. Such a bunch can be compressed by the velocity difference though the drift space. We have already installed it to our accelerator system and successfully observed a coherent synchrotron/transition radiation at 0.3THz. It is clear that the bunch length was short enough to generate 0.3THz, which corresponds to less than 500fs bunch length was achieved if we assume the gaussian shape. In this conference, the principle of ECC-RF-Gun, the recent results of bunch length measurement and future prospective will be presented. PB - JACoW CP - Geneva, Switzerland SP - 685 EP - 687 KW - gun KW - electron KW - cavity KW - simulation KW - radiation DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-MOPRI039 UR - http://jacow.org/ipac2014/papers/mopri039.pdf ER -