High power RF test of C-band rf mass-production components 8 GeV at XFEL/SPring-8 Tatsuyuki Sakurai 1,A,B) , Takahiro Inagaki A,B) , Chikara Kondo A,B) , Katsutoshi Shirasawa A,B) , Shinsuke Suzuki A) , Tsumoru Shintake B) A) XFEL/JASRI 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148 B) XFEL/RIKEN 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148 Abstract We report the high power rf test results of C-band accelerator system for X-ray free electron laser (XFEL) in SPring- 8 site. In XFEL main accelerator, 64 C-band systems will be used in total, whose components have already finished mass production. We performed the high power RF test with three sets of the mass-produced components in XFEL test bunker. We operated the C-band components with the accelerating gradient, as high as 42 MV/m. We measured the high voltage breakdown rate and the dark current emission. * * & & ) ) % % G G M M " " ! ! ) ) # # À À Ƈ Ƈ Ø Ø k k m m s s Ɠ Ɠ ņ ņ Ö Ö M M ä ä Ɲ Ɲ ¿ ¿ Ż Ż Ƣ Ƣ 1 E-mail: [email protected] ć0NĴƕ)(MŨj\ōŅ=AY ŨŮʼnƝçjMƖō\*&)%i` uGŲJDF3Y/÷ęVXÀƇØƑMċ \Ɩæ>.ńÝNċM7ţ>F3Y/ ÷ę6WNÀƇØMblfƊƁ\ìĔ@Y ëG2Y/ Û1 XFELŨüÀƇØMģĆÛ ÛKÀƇØMģĆÛ\Ř@/$ cov ŀƝçƔ6WōŅ>C $MƝç|N +zq. +mp.zv ŴĪŜĵ.zvŜĵ.zvŴĪŜĵGģ Ć=ZY°ïƑH"!)#."!)#GƇøãŽzq Üũ\Ų4/RCĬMŗĮzqÜũØKVDF zqÜũ\Ų4/BZKVX}eƝĶ '.m `mbrpmƥ! ((Ƨ(*!#MƝç|\ §X¸@/ ŨüÀƇØGNÀƇƑH>FĝMz vÀƇŠ\¨Ň@Y/<ZWMÀƇŠM´.ĝ\ ƇøãŽzqÜũK¨Ň>.ĝ\ÀƇƝŋ (GƊƁ>.Ɲç|bxd\ $RG ÀƇ=AY/ XFEL':$5< ÛKGM"!)#ÀƇØkmsMħØĥú Û\Ř@/"!)#kmsNÀƇŠ7ĝ. {mhri.ñĴŠ.{me `mu.lpƝļ.ƣšø¯ ƝØ.¤Ɲ¿kms.p`fkms. ¼āųŬJIGģĆ=Z.ć0N<ZW\wr uHÔ]G3Y/ÛKsmumpvMħØ ƒŬ¶Ŕ\Ř@/<<GNƓņÖMifŻ ƢHƈŧƊƁ\ŲDF5X.<ZWMħØNì ħG¨Ň@YƓņÖG.ƒŬTƑMŒŨñĴŠ\ Ƙ8ìħ`_auKÐ[AF3Y/÷ęM ƊƁţRGKŵ§ĕĜMŌJYwruMäƝ ¿ŻƢ\ìĔ>C/ Proceedings of the 7th Annual Meeting of Particle Accelerator Society of Japan (August 4-6, 2010, Himeji, Japan) -836-