Speaker
Dr
Ruediger Picker
(TRIUMF)
Description
Most (if not even all) experiments with ultra-cold neutrons (UCN)
currently under development need higher UCN densities than presently available. There are multiple efforts world wide to achieve an increase of up to three orders of magnitude in the storable number of UCNs. Different combinations of neutron source and UCN convertor are used by the various groups.
Neutrons either come from a research reactor or an accelerator-driven spallation source; superfluid helium or frozen deuterium are used as converter material.
The UCN source at TRIUMF in Canada will use the 480-MeV proton beam
from the cyclotron impinging on a tungsten target to create spallation neutrons. A combination of lead, graphite, light and heavy water and possibly liquid deuterium and Be will moderate the neutrons; the superthermal converter He-II scatters the neutrons down to the ultra-cold regime.
With a beam current of 40 muA, a density of > 1e4/cc should be achievable.
The progress towards the dedicated UCN beamline at TRIUMF, the
optimization of the moderator design and development of the neutron
electric dipole moment experiment will be presented.
Primary author
Dr
Ruediger Picker
(TRIUMF)
Co-authors
Akira Konaka
(TRIUMF)
Andy Miller
(TRIUMF)
Blair Jamieson
(University of Winnipeg)
Charles Davis
(TRIUMF)
Chris Bidinosti
(University of Winnipeg)
Desmond Ramsay
(TRIUMF)
Edgard Pierre
(TRIUMF)
Elie Korkmaz
(University of Northern British Columbia)
Eric Miller
(TRIUMF)
Fleurette Doresty
(University of Manitoba)
Jeffery Martin
(University of Winnipeg)
Jim Birchall
(University of Manitoba)
Larry Lee
(TRIUMF)
Mammei Juliette
(University of Manitoba)
Mammei Russel
(University of Winnipeg)
Michael Gericke
(University of Manitoba)
Remy Dawson
(TRIUMF)
Shelley Page
(University of Manitoba)
Takamasa Momose
(University of British Columbia)
W.R. Falk
(University of Manitoba)
Willem van Oers
(TRIUMF)
Yunchang Shin
(TRIUMF)
m: Lang
(University of Winnipeg)
