nEDM 2017

Session

Posters

Oct 18, 2017, 3:00 p.m.

Harrison Hot Springs

19. Compensation of Magnetic Fields at the the TRIUMF nEDM Experiment

Mr Shomi Ahmed (for the TRIUMF Japan-Canada UCN Collaboration)

2017-10-18, 3:00 p.m.

Magnetic field control (passive and active shielding, coil design, current sources)

Poster

The existence of a non-zero neutron electric dipole moment (nEDM) would violate parity and time-reversal symmetry. Extensions to the Standard Model predict the nEDM to be $10^{-26}$ -- $10^{-28}$ e-cm. The current best upper limit set by Sussex/RAL/ILL nEDM experiment is $3.0 \times 10^{-26}$ e-cm. The nEDM experiment at TRIUMF is aiming at the $10^{-27}$ e-cm sensitivity level . We are...

18. High Resolution Two Photon Spectroscopy of the 6p←5p transition of Xenon at 252 nm

Emily Altiere (University of British Columbia), Eric Miller (University of British Columbia)

2017-10-18, 3:00 p.m.

Poster

The nEDM (neutron electric dipole moment) project at TRIUMF’s recently established ultra cold neutron (UCN) facility in Canada will introduce a dual co-magnetometer with cohabiting 129Xe and 199Hg for measuring precise magnetic fields within a neutron storage cell. By simultaneously incorporating two atomic species we can deduce both the magnitude and gradient of the magnetic fields, thereby...

3. Prospects for an improved precision of $γ_{Hg-199}$ with a $^{199}$Hg-$^4$He co-magnetometer

Dr arnaud leredde (LPSC, Université Grenoble-Alpes)

2017-10-18, 3:00 p.m.

Poster

In the scope of the n2EDM experiment, aiming for a sensitivity of $σ_{d_n }=1×10^{-27}$e.cm, the precise measurement of the magnetic field and its gradients is critical. Taking advantage of the gravitational shift between the neutrons and the mercury atoms of the co-magnetometer to correct for the false EDM induced by the relativistic motional field, this problem reduces to the knowledge of...

49. Status and results for the nEDM experiment at PSI

Ms Solange Emmenegger (ETH Zürich)

2017-10-18, 3:00 p.m.

Experimental techniques (cryogenic, room temperature, crystal)

Poster

The nEDM experiment at the Paul Scherrer Institute (PSI) has finished data taking and preparations for the installation of the new n2EDM apparatus are in progress. This poster presents the best performances of the nEDM experiment in terms of the transverse spin relaxation time $T_2$, the visibility $\alpha$ and the best statistical sensitivity per day. We also show the best performances of the...

44. The UCN facility at TRIUMF

Steve Sidhu (TRIUMF, SFU)

2017-10-18, 3:00 p.m.

Poster

The newly installed vertical source at TRIUMF will enable the production of neutrons with energies below 300~neV, referred to as ultracold neutrons (UCN). A superfluid helium cryostat uses three cooling stages and a heat exchanger to produce isopure He-II at <1K. Fast neutrons are produced through spallation of a tungsten target by a proton beam from the TRIUMF 520~MeV cyclotron. These...

23. Vertical UCN Source Status at TRIUMF

Ms Taraneh Andalib (University of Manitoba/TRIUMF/University of Winnipeg)

2017-10-18, 3:00 p.m.

Poster

The neutron EDM experiment at TRIUMF aims to measure the nEDM to the precision of ~$10^{−27}$ e$\cdot$cm by using a new superfluid He ultracold neutron (UCN) source. The Japan-Canada UCN source is unique in combining a neutron spallation source with superfluid helium. The new UCN source is expected to yield the highest density of UCNs worldwide. The ongoing research on the present...