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Absorber Design Concept. RIKEN/RBRC Itaru Nakagawa. 19cm. 16cm. 37°. f 56 cm. 2 1cm. 2 7 cm. 10°. 2.34 meters. 35 cm. Total 8.6t. Material : Copper, Brass, Bronze, Stainless Steel. Since Flower pot is tapered, we cannot install absorber from - PowerPoint PPT Presentation
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Absorber Design Concept
RIKEN/RBRCItaru Nakagawa
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2.34 meters
f 56cm2 1cm
35 cm
37°
10°
16cm
A (thickness 16cm) B (thickness 19cm)
Volume 0.38 m3 0.58 m3
Net Weight 3.4t 5.2t
19cm
2 7cm
Material : Copper, Brass, Bronze, Stainless SteelTotal 8.6t
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1 2
34
Since Flower pot is tapered, we cannot install absorber fromthe back if absorber is made in one body. Ring design also faces same installation problem.
Thus the present idea is to segment front and back absorbers into 4 pieces,respectively. Total 8 pieces.
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1 2
34
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 thejoints will be exact (less than mm).
We’ll fill out this gap with spacers, if we found it is necessary.
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Constraint of Installation
absorber
Counter weight
Crane Max = 12t
Each absorber piece Is preferably less than2 tons. (Don) 8 pieces segmentationbrings each piece about 1t.
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~ 25cm
Interference w/ BBC Cables
BBC cables are running at 25 cm elevationfrom the surface of central magnet back.We need to re-route cables at the elevationof 35cm on top of the absorber back surface.
Andrew Cables
Andrew cable/connectors are very stiff. Minimum bending angle and number of timesare strictly limited.
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Modification of BBC Patch Connection
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Flower Pot Design (South)
10cm
New patch panel
(66mm)
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Available Space
90mm
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Japanese CompaniesCompany Material Manufacture Quote Comment
Izumi Metal / Akaboshi co. ltd. Bronze Casting Next week Confident in time
Sumitomo Heavy Industrial ltd.
Brass Casting $300k Difficulty in time
Copper Plate Faster, but 4 layers
Hitachi Engineering
Oxygen Free Copper Forging 3/18
Yuasa Ltd. Brass Casting Next week
Tohoku Oye Industry Next week
Takano Giken Brass Next week
Okamoto Brass Casting $220k + machining
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Stainless Steel
Company Material Machining Quote Comment
Giken-Seiki Co. SUS310? Lathe TurningExperienced w/
SUS316 B<40uT
Iijima Machinary Co. Appointment 3/19
Yagita Giken Co. SUS310? ASAP
Inoue Material Need Drawing to Estimate
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Permeability of SUS
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