Proceedings of the 2nd Annual Meeting of Particle Accelerator Society of Japanand the 30th Linear Accelerator Meeting in Japan (July 20 - 22, 2005, Tosu Japan)

PRESENT STATUS OF
THE KEK ELECTRON/POSITRON INJECTOR LINAC
Yujiro Ogawa1 for the electron/positron injector group
KEK, High Energy Accelerator Research Organization, Accelerator Laboratory
1-1 Oho, Tsukuba-shi, Ibaraki-ken, 305-0801
Abstract
The KEK electron/positron injector linac has been operated for about 7000 hours since FY1999, delivering four
different beams to KEKB-HER(8 GeV, 1 nC, e-)/LER(3.5 GeV, 0.8 nC, e+), PF(2.5 GeV, 0.2 nC, e-) and PR-AR(3GeV, 0.2 nC, e-). In FY2004, the continuous injection mode for the KEKB rings has been constantly implemented,
making the injection time almost double. Although the high availability of the linac has been maintained even inthese severe conditions without introducing any serious machine failures or beam degradation, a new issue concerning
beam sharing among four rings has come out. The operational status and a new project to resolve this beam–sharing
problem is described together with on-going various R&Ds for future accelerators.

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Proceedings of the 2nd Annual Meeting of Particle Accelerator Society of Japanand the 30th Linear Accelerator Meeting in Japan (July 20 - 22, 2005, Tosu Japan)

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[3] Ú ķ Ē ¤ . “KEKBĠ È { " i Đ Â !  1 Q W } ĝ ĳ ę " ¡ ³ (II)”, These proceedings.
[4] Ł Ŀ z Ä . “KEKē ¹  ņ ē ¹ Ġ È { !  1 RFI ^ F S "  Ö ”, These proceedings.
[5] K.Nakao et al., “Dip Test, the Quick Measurement of
Cathode Activity of the High Power Klystron in KEKB
Injector Linac”, Proceedings of the 2005 Particle
Accelerator Conference.
URL: http://www.sns.gov/pac05/pac05.shtml[6] ļ ĸ  ã . “KEKB ^ L 5 F ; ! k  1 > 6 ] I ab "  Ö ”, These proceedings.
[7] Ė İ Ą Ĥ . “KEKē ¹ ņ ē ¹ Ġ È { !  1 ; ] 6AIab. % £ Ì Ħ ñ " f Á y Ŋ ”, Theseproceedings.
[8] Ĉ ĕ   . “; ] 6 A I a b Y @ [ `  C = b Ia  _ \ L F I ¿  ? A G W " t Ĩ ”, Theseproceedings.
[9] ~ Ē   . “; ] 6 A I a b " RFĦ    "  gċ è  Ħ  Ø Ă ń FPGAU  J " t Ĩ ”, Theseproceedings.
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[13]  ė ý ŀ . “KEK-Linac!  1 Web T  A | { ŉŏ ĭ Æ ? A G W ”, These proceedings.
[1 4] ć Ĉ   1 . Private communication.
[15] Ú ķ Ē ¤ . “£ ē Å Ô   (  ? ^ = b  Ñ ! .
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[16] ĵ ç  Ĳ . “9  U b K N E [  R Ŏ h  3 Á ē s Ķ Ï ē ¹ Í " t Ĩ (2)”, These proceedings.
[17] ą Ē  ă . “ğ à Xí 3 ń  ē ¹ Í Q  W " ĪÐ > 6 B ä ĺ ö č ”, These proceedings.
[18] İ Ē Ľ Ë . “KEKĊ ē ě ¿  ó Ć (STF)" RF " tĨ ”, These proceedings.
[19] ¾ ÿ þ ¬ . “SuperKEKB"  + " CO b J n ÷ y t
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[20] Ý ù £ º . “w Ļ  9 S ]  3 ­ ń   CO b Jn ÷ y ”, These proceedings.
[21] l µ œ ½ . “SuperKEKB ń C-bandn ÷ y 2 ¥ | " tĨ ”, These proceedings.

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