Prof.
Peter Fierlinger
(Technical University München)
03/11/2014, 10:30
Oral
At the FRM-II reactor we are currently setting up a new apparatus to measure the neutron EDM with a projected sensitivity of 10-28 ecm. To reach this 100 times improved measurement precision, next to the strongest possible source of ultra-cold neutrons, also the understanding of many systematic issues on a yet unprecedented level is required.
Understanding systematic effects includes the...
Prof.
Robert Golub
(ncsu)
03/11/2014, 11:15
Oral
In the past year the design for the apparatus has undergone a major over-haul which has moved the design in the direction of more standard cryogenic practice.
After a description of the concept of the experiment we will discuss the new design and the challenges associated with it.
Dr
Stephanie Roccia
(CSNSM)
03/11/2014, 14:00
Oral
At the Paul Scherrer Institute, a collaboration of 14 institutions is conducting an experiment to search for a permanent neutron electric dipole moment.
The experiment uses ultracold neutrons (UCN) stored in vacuum at room temperature.
This technique provided the last (and best) limit by the RAL/Sussex/ILL collaboration in 2006: 2.9 × 10-26 e cm (90% C.L.).
We aim at improving this limit...
Dr
Takeyasu Ito
(Los Alamos National Laboratory)
03/11/2014, 14:45
Los Alamos National Laboratory (LANL) currently operates a proton-beam-driven solid-deuterium-based UCN source, providing UCN for various neutron beta decay experiments as well as R&D for the SNS nEDM experiment. An estimate shows that the combination of further optimization of the source geometry and cold moderator material, increased proton beam current, and more optimized proton pulse...
Prof.
Yasuhiro Masuda
(IPNS, KEK)
03/11/2014, 16:00
Oral
We have constructed a new He-II UCN source. The performance of this new UCN source will be discussed. We will also discuss technical developments for nEDM. Preparations of magnetic field and a magnetometer will be discussed.
Prof.
Anatolii Serebrov
(Petersburg Nuclear Physics Institute)
03/11/2014, 16:50
Oral
For the last few years the work on preparation and performance of an experiment on neutron EDM search with the PNPI double-chamber EDM spectrometer has been carried out by collaboration of PNPI-ILL-PTI with PF2 MAM ultra cold neutron beam at ILL. We have obtained constraint for neutron EDM value at confidence level of 90%: |dn| < 5,5 * 10-26 e*cm. The double-chamber spectrometer provides...
Dr
Ruediger Picker
(TRIUMF)
03/11/2014, 17:40
Oral
- on behalf of the TRIUMF UCN collaboration -
The 500 meV proton cyclotron at Canada's National Lab for Particle and Nuclear Physics, TRIUMF, will be used for a spallation driven ultra-cold neutron source. As a first experiment, the search of the neutron electric dipole moment (nEDM) is planned. The talk will cover design and status of the extracted superfluid helium-4 based UCN source and...
Dr
Florian Piegsa
(ETH Zürich)
04/11/2014, 08:50
Oral
A novel concept to search for a CP-violating neutron electric dipole moment (nEDM) has been presented [F.M. Piegsa, Phys. Rev. C 88, 045502 (2013)]. It employs a pulsed neutron beam instead of the established use of storable ultracold neutrons (UCN). The technique takes advantage of the high peak flux and the time structure of a next-generation pulsed spallation source (e.g. the planned...
Dr
Vladimir Voronin
(Petersburg Nuclear Physics Institute)
04/11/2014, 09:40
Oral
The proposed method to search for the neutron EDM is based on using a large crystal electric field affected the neutron in a crystal without center of symmetry during all the time of neutron stay in crystal.
Value of the field can reach about $10^9$V/cm and experimentally measured value for quartz crystal is $\sim 10^8$ V/cm.
The first variant of the experimental setup based on using a...