13.5 7.0 25.0 2.0 5.0 309.5 47.5 39.0 12.5 422.0 bobbin Thermal radiation shield Magnet cryostat Large End Flange 386.0 362.0 24.0 The leading dimensions.

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Presentation transcript:

bobbin Thermal radiation shield Magnet cryostat Large End Flange The leading dimensions shown on the interface drawing to both KEK and Tesla

bobbin Thermal radiation shield Magnet cryostat Large End Flange Hydrogen Absorber and the feed pipes are already made and tested. Cool down test has already started. It is not possible to make any change or modification on the pipe work arrangement on the Absorber. Spoken to Shigeru who confirmed that nothing could be done to change. The constraint from KEK: Constraint from Tesla:- Tesla needs 10mm for the extra thickness for the bobbin end plate. They also increased the gap at and thicken up the thermal radiation shield sheet metal from 2mm to 4mm. (Are these absolutely latter necessary?) Foul!! Foul between LH2 pipe and magnet cryostat !!! The design as it stands

bobbin Thermal radiation shield Magnet cryostat Large End Flange The only solution is to shift the absorber upstream by 15.4mm Solution 1

bobbin Thermal radiation shield Magnet cryostat Large End Flange Coil moved downstream by 10mm Solution 2 Tesla to agree to change the parameters as those shown in red, and MICE agree that the coil pair be moved 10mm towards the centre