NuPECC Meeting Edinburgh

Design Study “EDM”

October 10, 2014 | Hans Ströher (Forschungszentrum Jülich)

Novel precision storage rings for Electric Dipole Moment searches

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CP Violation by EDMs

Electric Dipole Moments violate P- and T-invariance Spin EDM + T + Original illustration by: physicsworld.com

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 Matter Ratio 10 10 :1 Anti Matter This is one of the big unsolved problems in physics !

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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

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

„ all-electric (E) ring “ magic momentum

Proton, Deuteron, 3 He:

„ all-in-one (E-B) ring “ variable momenta

Right: fixing the horizontal spin along the momentum direction

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Project impact

EDM searches are must-do experiments

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

The EDM Storage Ring will be a European flagship project !

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Design Study

WP6: Ring Layout WP3: Electrostatic Deflectors WP4: Beam Instrumentation WP5: Beam Polarimetry WP2: Dissemination of results WP1: Consortium Management

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Design Study

WP6: Ring Layout Concept: use of clockwise (false effects and counter-clockwise beams



systematic errors) Proton: „all-electric ring“



one vacuum chamber Proton, deuteron ( 3 He): „E-B ring“



separate beams

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Participants

42 months, 2.8 M € (personnel only)

Deliverable:

CDR

for storage ring

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