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EDMEDM Collaboration Meeting 3-06
Jan Boissevain, P-25March 2, 2006
NCSU
EDM Experiment
Design Status
EDM Key Design Parameters
• 2 ea Measurement Cells 76mm x 100mm x 500mm• HV Study (Mischke) Drives Helium Volume Size• Magnet Field Uniformity Requirement Drives B0 Size
EDM
EDM
EDM
EDM
EDM 3He Injection Volume (1 Liter)
From 3He Source
Cesium Port
4He Liquid Level
Double Wall Pyrex Volume
Outer 4He Volume Connected to DR Mixer
EDM Upper Cryostat Installation
EDM Target Cryostat Insert
EDM Target Cryostat w/ Dressing Coils
EDM Target Cryostat w/ Gradient Coil Added
EDM Target Cryostat w/ B0 Magnet Added
EDM T. Cryostat w/ Ferromagnetic Shield Added
EDM
EDM
EDM Target Cryostat Hor. Section
EDM Ferromagnetic Shield Nesting
Inner Dressing Coil
Outer Dressing Coil
B0 cosθ Magnet
Ferromagnetic Shield
Superconducting Lead Shield
Gradient Magnet Coil
EDM Ferromagnetic Shield Nesting 2
Inner Dressing Coil
Outer Dressing Coil
50°K Shield
4°K Shield
Superconducting Lead Shield
Ferromagnetic Shield
B0 cosθ Magnet
Gradient Coil
EDM Central LHe Volume Mount
Vacuum Can
50°K Shield
4°K Shield
Central LHe Volume4 Layer
μMetal Shield
Mount (1 of 4)
EDM Central He Volume Mount 2
Vacuum Can
50°K Shield Mount Point
4°K Shield Mount Point
Central Volume Mount Point
50°K Shield
4°K Shield
EDM EDM/Beam-line Interface
Collimator
Be Foil 4°K Shield
Be Foil 50°K Shield
Be/Teflon Multi-Foil Window at LHe/Vacuum Interface
Measurement Cell
EDM What’s Missing
• Laser Ports• Light Guide Solution• PMTs
EDM Engineering Concerns
• Target Cryostat Materials– Flange Material? SS? CuNi?
– Fasteners?
• 3He Injection Volume– Super-fluid Film Stopper
– Friendly Environment for Incoming Polarized 3He
– Cesium Vaporizer
EDM EDM Cell Lifetime Experiment
EDM EDM Cell Lifetime Section
EDM Upper Cryostat Test in MPF-10
EDM Prototype Upper Cryostat
EDM Upper Cryostat Test Section
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