Hayashi, K.

Paper	Title	Page
WEPMN023	Development of 10 MW L-Band Multi-Beam Klystron (MBK) for European X-FEL Project	2098
	Y. H. Chin KEK, Ibaraki K. Hayashi TETD, Otawara M. Y. Miyake, Y. Yano Toshiba, Yokohama
	A 10MW L-band Multi-Beam Klystron (MBK) has been developed and tested by Toshiba, Japan for the European XFEL and a future linear collider projects.? The Toshiba MBK has six low-perveance beams operated at low voltage of 115kV (for 10MW) and six ring-shaped cavities to enable a higher efficiency than a single-beam klystron for a similar power. After the successful acceptance testing at the Toshiba Nasu factory in March 2006, attended by a DESY stuff, the final acceptance test was done at DESY laboratory in June 2006. In these tests, the output power of 10.2MW, more than the design goal (10MW), has been demonstrated at the standard beam voltage of 115kV at the RF pulse length of 1.5ms and the beam pulse of 1.7ms at 10Hz. The efficiency was 66%. The robustness of the tube was also demonstrated by being operated continuously more than 24 hours above 10MW. A horizontal version of the Toshiba MBK is now under construction.
THIBKI03	Klystron Development by TETD	2688
	K. Hayashi, M. Irikura, Y. Mitsunaka, Y. Okubo, M. Sakamoto, H. Taoka, K. Tetsuka, H. Urakata TETD, Otawara M. Y. Miyake, Y. Yano Toshiba, Yokohama
	TETD (Toshiba Electron Tubes & Devices Co., LTD.) has been developing vacuum microwave devices such as klystrons, gyrotrons and input couplers in collaboration with some Japanese research institutes. This article describes recent development status of klystrons and input couplers for high-power RF accelerator systems including a 324-MHz and a 972-MHz klystrons for JARC, 1.3-GHz vertical and horizontal MBKs for DESY and a 1.3-GHz TTF-type input coupler for European XFEL. As an application to fusion experimental devices, development of a 5-GHz, 500-kW CW klystron for KSTAR and a 170-GHz quasi-CW gyrotron for ITER are also presented.
	Slides
TUPMN048	Recent Developments at UVSOR-II	1028
	M. Katoh, K. Hayashi, M. Hosaka, A. Mochihashi, M. Shimada, J. Yamazaki UVSOR, Okazaki Y. Takashima Nagoya University, Nagoya
	UVSOR, a 750 MeV synchrotron light source of 53m circumference had been operated for more than 20 years. After a major upgrade in 2003, this machine was renamed to be UVSOR-II. The ring is now routinely operated with low emittance of 27 nm-rad and with four undulators, two in-vacuum ones and two variably polarized ones. The injector and the beam transport line are being upgraded to be compatible with full energy injection, preparing for the top up operation in near future. A resonator type free electron laser is successfully operational in very wide range, from visible to deep UV, with high average power exceeding 1 W. A femto-second laser bunch slicing system was constructed by utilizing a part of the FEL system. Intense coherent terahertz radiation was successfully produced by the slicing. Coherent harmonic generation was successfully demonstrated by using the same laser system.