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TY - CONF AU - Miyajima, T. AU - Hajima, R. AU - Harada, K. AU - Honda, Y. AU - Hwang, J.G. AU - Kume, T. AU - Nagahashi, S. AU - Nagai, R. AU - Nakamura, N. AU - Nishimori, N. AU - Obina, T. AU - Sakanaka, S. AU - Shimada, M. AU - Takai, R. AU - Uchiyama, T. AU - Ueda, A. AU - Yamamoto, M. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Low Emittance Electron Beam Transportation in Compact ERL Injector J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - For future light source based on Energy Recovery Linac (ERL), an injector, which consists of a photocathode DC gun and superconducting RF cavities, is a key part to generate a low emittance, short pulse and high bunch charge electron beam. In compact ERL (cERL) which is a test accelerator to develop key technologies for ERL, the generation of low emittance electron beam with 0.1 mm mrad normalized emittance and 390 keV beam energy from the photocathode DC gun, and the acceleration to 5.6 MeV by superconducting cavity, were demonstrated in the first beam commissioning. To keep the high quality in the beam transportation, understanding the beam optics, which is affected by not only the focusing effects due to the gun, solenoid magnets and RF cavities but also space charge effect, is required. In this presentation, we will show that how to measure and correct the focusing effect by experimental method. Using this method, we succeeded in correcting the analytical model to give the good agreement with the measured gun focusing for low charge beam. And, we will show the space charge effect for high bunch charge beam. PB - JACoW CP - Geneva, Switzerland SP - 3104 EP - 3106 KW - gun KW - cathode KW - focusing KW - laser KW - solenoid DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-THPRO093 UR - http://jacow.org/ipac2014/papers/thpro093.pdf ER -