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Innovative Absorber Design for RIKEN/RBRC: Modular Segmentation for Optimized Installation

This concept outlines a new approach to absorber design at RIKEN/RBRC, proposed by Itaru Nakagawa. The tapered flower pot shape necessitates a modular structure, dividing the absorber into eight segments for simpler installation. Each piece is designed to weigh under 2 tons, facilitating ease of handling with crane constraints. The materials include copper, brass, bronze, and stainless steel. The design also addresses interference with BBC cables, proposing a reroute at an appropriate elevation. This innovative solution combines efficient manufacturing with practical installation needs.

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Innovative Absorber Design for RIKEN/RBRC: Modular Segmentation for Optimized Installation

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  1. Absorber Design Concept RIKEN/RBRC Itaru Nakagawa

  2. 19cm 16cm 37° f56cm ２1cm ２7cm 10° 2.34 meters 35 cm Total 8.6t Material : Copper, Brass, Bronze, Stainless Steel

  3. Since Flower pot is tapered, we cannot install absorber from the back if absorber is made in one body. Ring design also faces same installation problem. １ ２ ４ ３ Thus the present idea is to segment front and back absorbers into 4 pieces, respectively. Total 8 pieces.

  4. If the company make the absorber by casting of whole absorber and then chop into pieces, then there will be space in the order of a few mm. If they do machining each pieces, then the joints will be exact (less than mm). １ ２ ４ ３ We’ll fill out this gap with spacers, if we found it is necessary.

  5. Constraint of Installation Crane Max = 12t Each absorber piece Is preferably less than 2 tons. (Don) 8 pieces segmentation brings each piece about 1t. absorber Counter weight

  6. Interference w/ BBC Cables ~ 25cm BBC cables are running at 25 cm elevation from the surface of central magnet back. We need to re-route cables at the elevation of 35cm on top of the absorber back surface. Andrew Cables Andrew cable/connectors are very stiff. Minimum bending angle and number of times are strictly limited.

  7. Modification of BBC Patch Connection

  8. Flower Pot Design (South) New patch panel (66mm) 10cm

  9. Available Space 90mm

  10. Japanese Companies

  11. Stainless Steel

  12. Permeability of SUS

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