Proceedings of the 1st Annual Meeting of Particle Accelerator Society of Japanand the 29th Linear Accelerator Meeting in Japan (August 4 - 6, 2004, Funabashi Japan)

STATUS OF THE SPring-8 LINAC
H. Hanaki, T. Asaka, H. Dewa, T. Kobayashi, A. Mizuno, S. Suzuki, T. Taniuchi, H. Tomizawa and K. Yanagida
Japan Synchrotron Radiation Research Institute (JASRI/Spring-8)
Kouto, Mikazuki, Sayo, Hyogo, 679-5198
Abstract
SPring-8 in the top-up opeartion has been providing synchrotron radiation lights with constancy of 0.1% or less. Alinac has been improved in order to stably maintain the top-up injections into a synchrotron and the NewSUBARU
storage ring: We have enhanced the RF stability and the reliability of devices not to interrupt the minute-by-minuteinjections. A fast response switching magnet was installed in a beam transport line for the simultaneous injections intothe two rings. An RF gun test bench has been reinforced: The beam energy was increased to 30 MeV and a laser system
was improved to generate laser lights of 1.5% rms stability. The chemical etching was tried to treat a surface of an RF
gun cavity. The maximum field gradient reached up to 183 MV/m after RF conditioning.

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6130 [MV/m] (6.8 10 shots)

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5.2 {øRFAR^e[9])ıĕ 6& ĄÕ%² ö(AR^ e#! [ `Ê ĘĠ Eĸ 9č  ( č±9{øĂ qę# ĺ7ĕ £¶AR ^e(ï¡9´ ! 7(²ö(ŃĔ)¡¾&48*Æ(č6AR^e( ĕĖ) {øNgº āĕ(Ĺ #Úıĕ9& #ÿ87
JjEg\ =V"2 ĕÇßĤýÝ è&47[ `,(tÚ æĳľ­¸ģ đā(ú²ö Ą% 1ì½3  #2 Č×" 7 ( //")Ę Ġ#Ăq ęĪ"({ø F>jÚ !( Īī đ&ķû&%7# ¢Ĕ 7·«2ï¡9ä1ĎĕŋaTg9ì½ [1] H. Tanaka, et al., “Top-up operation at SPring-8 –rd
towards maximizing the potential of a 3 generation
light source”, EPAC2004, Lucerne, Switzerland.
[2] T. Asaka, et al., “SPring-8ð{ø(Top-Upsēýw”, these proceedings.
 
[3] S. Suzuki, et al., “Improvement of SPring-8 linac
towards top-up operation”, EPAC2004, Switzerland.
5.1 RFęĝĦĸÖń[8][4] S. Nagasawa, et al., “Spring-8ð{øĕÂÓĕ~(µĕÄ¦"ě58ć¥5{øę©JLS`(ġ”, these proceedings.
ĭĸ(v84+¿zĚ &íĕđ&ĩĉ7ō{[5] T. Hasegawa, et al., “ĕÂÓaKchPĿç ¬øĝıĕ( §r#³"ęĝĭ(¿ zJLS`(ġ”, these proceedings.
Ě9Øë á&71z?RQjE9Ä 0ĦĸòĖ 9.#:$kz% ?RQjE Ŋ [6] H. Tomizawa, et al., “\@UAOVRFĕÂÓ(1(hI®©(µĨÍz”, these proceedings.
)Ä¦į&47ċ¹(£}0.3µmny"Î»&RFĕÂÓę9(ºĒà¤"?RQj E [7] H. Dewa et al., “Photo cathode RF gun designed as asingle cell cavity” EPAC2004, Lucerne, Switzerland.
ÖńRFGjT=JdWjE9´ (£}ny(å&È 4& ķÖń(ę&ģ-!G j [8] H. Tomizawa et al., “z?RQjE(ķ¿ó ĚT= JdW j E( ä ´) ) 7 & ø Gj T =ìRFę(Ħĸ&ý7°}”, these proceedings.
JdWjE##2&mĕ Ň)¨ÛºāĕĖ [9] T. Taniuchi, et al., “ä´Ġ&7ĘĠĕ) Ñ«&183 MV/m&ă/ŊÂ°Ņ)
£¶A^e(RFĜè”, these proceedings.
155 MV/m&!8.610-3%#~ºµ(Ć"3