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IChep_2012_Construction_of_Cooling_Channel.txt

Heidt, Christopher, 17 April 2012 18:40

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Both components are technically challenging.  
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The Focus Coils are dual-coil superconducting solenoids, in close proximity,
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wound on a common mandrel. Each pair of coils is run in series, but can be
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configured with the coil polarities in the same (solenoid mode) or opposite
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(gradient mode). At the center of each FC there is a 20-L liquid-hydrogen
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absorber, operating at about 14 K, to serve as the energy loss medium for the
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ionization cooling process.  
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The longitudinal beam momentum is restored in the RFCC modules, each housing
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four 201.25-MHz RF cavities whose irises are closed with 42-cm diameter thin Be
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windows. To contain the muon beam, each RFCC module also has a 1.4-m diameter
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superconducting coupling solenoid surrounding the cavities. Both types of magnet
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are cooled with multiple 2-stage cryo-coolers, each delivering 1.5 W of cooling
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at 4 K.  
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Designs for all components are complete and fabrication is under way.
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Descriptions of the various components, design requirements, and construction
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status will be described.