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RESEARCH PRODUCT

Towards a new measurement of the neutron electric dipole moment

S. RocciaLutz TrahmsG. HampelSoumen PaulD. RebreyendWerner HeilPeter FierlingerJacek ZejmaN. V. KhomutovPaul E. KnowlesA. MtchedlishviliS. Knappe-grünebergM. DaumG. RogelYu. SobolevAllard SchnabelNorbert WiehlAntoine WeisM. HorrasG. PetzoldtA. S. PazgalevOscar Naviliat-cuncicA. KozelaI. AltarevT. Sander-thoemmesNatalis SeverijnsBernhard LaussKazimierz BodekC. Plonka-spehrGeza ZsigmondGeorg BisonG. QuéménerM. KuźniakAndreas KnechtT. LauerReinhold HenneckMilan CvijovicG. BanSt. KistrynErwin GutsmiedlJ. V. KratzMartin BurghoffT. LefortR. StoeplerE. PierreKlaus KirchF. Kuchler

subject

PhysicsNuclear and High Energy PhysicsTime reversal violationElectric dipole momentSpectrometerNeutron electric dipole momentPhysics::Instrumentation and Detectors010308 nuclear & particles physicsMagnetometerPhase (waves)[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciencesMagnetic fieldlaw.inventionElectric dipole momentlawElectric field0103 physical sciencesUltracold neutronsAtomic physicsUltracold neutronsNuclear Experiment010306 general physicsInstrumentation

description

International audience; The effort towards a new measurement of the neutron electric dipole moment (nEDM) at the Paul Scherrer Institut's (PSI) new high intensity source of ultracold neutrons (UCN) is described. The experimental technique relies on Ramsey's method of separated oscillatory fields, using UCN in vacuum with the apparatus at ambient temperature. In the first phase, R&D towards the upgrade of the RAL/Sussex/ILL apparatus is being performed at the Institut Laue-Langevin (ILL). In the second phase the apparatus, moved from ILL to PSI, will allow an improvement in experimental sensitivity by a factor of 5. In the third phase, a new spectrometer should gain another order of magnitude in sensitivity. The improvements will be mainly due to (1) much higher UCN intensity, (2) improved magnetometry and magnetic field control, and (3) a double chamber configuration with opposite electric field directions.

yearjournalcountryeditionlanguage
2009-09-18Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
https://doi.org/10.1016/j.nima.2009.07.046