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TY - CONF AU - Miyajima, T. AU - Hajima, R. AU - Harada, K. AU - Honda, Y. AU - Lee, D. AU - Miura, T. AU - Nagai, R. AU - Nakamura, N. AU - Nishimori, N. AU - Obina, T. AU - Qiu, F. AU - Sakai, H. AU - Sakanaka, S. AU - Shimada, M. AU - Takai, R. AU - Umemori, K. AU - Yamamoto, M. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Status of Higher Bunch Charge Operation in Compact ERL J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - In the KEK compact ERL (cERL), machine studies toward higher bunch charge operation is one of the most important issues. From January 2015 to April 2015, we carried out a higher bunch charge operation with an bunch charge of 0.5 pC for the experiment of laser compton scattering. After the study of space charge effect and optics tuning, we succeeded in the recirculation operation with the emittance, which was close to the design value. Moreover, a test operation in the injector section with the bunch charge of 7.7 pC was carried out as a preparation toward the recirculation operation with the average current of 10 mA. PB - JACoW CP - Geneva, Switzerland SP - 1583 EP - 1586 KW - operation KW - optics KW - space-charge KW - recirculation KW - emittance DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-TUPWA067 UR - http://jacow.org/ipac2015/papers/tupwa067.pdf ER -