Challenges of the world-wide experimental search for the electric dipole moment of the neutron

Session

Neutron

4 Nov 2014, 10:50

Congressi Stefano Franscini

44. PULSTAR UCN source and EDM Systematic Study

Dr Ekaterina Korobkina (NC State University)

04/11/2014, 10:50

Oral

The Ultra cold Neutron source at the PULSTAR reactor on the campus of NC State University is presently in the commissioning stage. Measurements of the cryostat cooling power proved that the LHe system will be able to take the predicted radiation loads in all heat exchangers of the system. In future, the source will host an experimental test-bed apparatus to study systematic EDM effects, using...

65. Status of the source for ultracold neutrons (UCN) at the Paul Scherrer Institute

Mr Dieter Ries (PSI)

04/11/2014, 11:30

Oral

The UCN source at the Paul Scherrer Institute is in operation since 2011 and providing UCN e.g. to the neutron EDM experiment. The operation principle of the source and the way of UCN production will be explained. The current status of the source and the progress made since start-up, will be presented, together with ongoing optimizations and measurements to characterize individual...

57. A UCN guide system for the future FRMII UCN source

Mr Thorsten Zechlau (FRMII)

04/11/2014, 15:00

Since several years a powerful UCN source is under development and construction at the FRMII reactor in munich. In order to deliver UCN produced inside the reactor (in a solid Deuterium converter) to experiments 30m away, a dedicated UCN guide System is required. In the last years available guide options were tested. This talk will give an overview on latest results obtained from the test of...

15. Geant4 Simulations Framework for nEDM@SNS!

Dr Jed Leggett (ORNL)

04/11/2014, 15:30

Oral

The nEDM@SNS simulations team has developed Geant4 based simulations of several key aspects of the experiment including: i) neutron-3He capture signal, ii) several sources of background (neutron activation, cosmic rays, neutron beta decay, etc.), iii) light collection (scintillation, wavelength shifting, and detailed photon propagation), iv) 3He spin precession, and v) UCN production in...

47. High Rate Detectors for Ultra Cold Neutrons at TRIUMF

Blair Jamieson (University of Winnipeg)

04/11/2014, 16:20

Oral

A high intensity UCN source, and an experiment to measure the neutron Electric Dipole Moment (nEDM) are being developed for TRIUMF. Some new physics predict nEDM contributions both above the present limit on the nEDM leading to their abandonment, and just below the present limit there are several other models vulnerable to the same fate. This talk will present the research and...

30. PSI - neutron detection

Mr thomas lefort (University of Caen)

04/11/2014, 16:45

Oral

A fast detector (NANOSC) and a simultaneous spin analyzer (USSA) have been built for the nEDM experiment at PSI. The detector is based on 6Li depleted glass scintillators (GS30) glass stuck to the front of 6Li enriched glass scintillators (GS20). With such a combination, the edge effects, inherent to low energy neutron detection, are suppressed and a clear separation between the gamma and the...

40. Simulations for the nEDM@PSI project - The MCUCN and STARucn codes

Dr Geza Zsigmond (Paul Scherrer Institut)

04/11/2014, 17:10

Oral

The MCUCN and STARucn codes for tracking ultracold neutron trajectories and spin were developed in order to perform optimization studies for UCN optics, and also for simulations supporting studies on nEDM experiment systematics. In this presentation we will briefly explain capabilities, algorithms, present inter-comparison calculations and analytic benchmarks performed with both...