Waveguides M. Yoshida (Osaka Univ.) MICE meeting at LBNL 09.Feb.2005 Connector Map for KEK beam test 126 Way 126 Way Bulkhead Connector 5 Bulkhead Connector 1 Bulkhead Connector 4 Bulkhead Connector 2 126 Way 126 Way Bulkhead Connector 3 126 Way G.Barber Waveguide inside cylinder • 2piR=1256mm • 1256/1.05 = ~1200 fibers on circle • ~650 channels/station • 650*5/1200 = 2.7 layers = 2.8 mm thick • Radius at the extraction should be > 50 mm R>50mm 128-way 400mm 2.8mm 22-way 20-way Waveguide outside solenoid D0 connector (128 holes) 17 boots 60 4000±25 熱収縮チューブ（10cm） 500±5 123…8 ... 128 遮光チューブ② (f28.5×3200mm) Connector surface 400±10 3200±5 遮光チューブ① (f21.2×500mm) Connector surface 400±10 f1.05mm clear fiber×128本 繋ぎの筒がD0ブーツから抜けないように、 あらかじめ接着剤でとめてください。 ファイバーを切るときは、はさみ、ニッパーは使わずに ホットナイフを使ってください。 遮光チューブはここ（山）で切ってください。 Quality Assurance • Previous productions have a few % bad channel • Careful QA will be performed in the next production • Cut clear fibers into pieces of 410cm (or shorter for inner waveguides) by a hot-knife • Check the fibers by eyes – Crack / Kink – Bump with strange diameter • Cramp fiber bundle with plastic piece at the both ends, Glue them, and Polish by diamond cutter • Check strange light transmission in the fiber bundle • Then, cut off the glued ends, and connectorize them into connectors Status • Design of Outer waveguide is fixed – 4m-long 128-way to 128-way • Length of inner waveguide will be fixed – 120cm-long 128-way to 4x22way + 2x20way • Clear fibers has been placed order, will be delivered on Feb.24th • 3 of existing 126-way waveguides will be modified for the 4th station in this month • 1 brand-new 128-way waveguide in the end of Feb. • Inner waveguides will be produced in March.
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