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October 10, 2014 | Hans Ströher (Forschungszentrum Jülich)

NuPECC Meeting Edinburgh

Design Study “EDM”

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Novel precision storage ringsfor Electric Dipole Moment searches

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CP Violation by EDMs

Electric Dipole Moments violate P- and T-invariance

Original illustration by: physicsworld.com

Spin EDM

++--

++--

T

Via CPT theorem, T-violation corresponds to CP-violation

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Science Case

The matter-antimatter asymmetry of the universe:

What we should see: What we actually see:

equal amount of predominantly matter matter and antimatter almost no antimatter

This is one of the big unsolved problems in physics !

Ratio1010 :1Matter

Anti-Matter

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Source(s) of EDMs

Multiple experimental input is required …

… to disentangle the fundamental source(s) of EDMs

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Principle of EDM Search

Particle spin alignment along momentum (frozen spin)

Radial E-field: torque on spin – rotation out of ring plane

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Frozen Spin Technique

Spin

Momentum

Left: a polarized charged particle (beam) in a storage ring

Right: fixing the horizontal spin along the momentum direction

Proton:„all-electric (E) ring“magic momentum

Proton, Deuteron, 3He:„all-in-one (E-B) ring“

variable momenta

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Project impact

Physics

-Search for new physics-Matter/antimatter puzzle-Complementary to LHC

Technology

-New storage ring design-Beyond state-of-the-art equipment

Society

-Capacity development (training, education)-International scientific cooperation-Cooperation with high-tech industry

EDM searches are must-do experiments

The EDM Storage Ring will be a European flagship project !

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Design Study

WP1: Consortium Management

WP4: Beam

Instrumentation

WP6: Ring Layout

WP5: Beam

Polarimetry

WP3: Electrostatic

Deflectors

WP2: Dissemination of results

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Design Study

WP6: Ring Layout

Concept: use of clockwise and counter-clockwise beams(false effects systematic errors)

Proton: „all-electric ring“ one vacuum chamberProton, deuteron (3He): „E-B ring“ separate beams

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Participants

42 months, 2.8 M€ (personnel only)Deliverable: CDR for storage ring