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