Speaker
Description
The TRIUMF Ultracold Advanced Neutron (TUCAN) source, when completed, will be a world-leading source of ultracold neutrons. The source is a unique combination of a spallation target coupled to a superfluid helium converter. A key component of the source is the liquid deuterium moderator, which surrounds the superfluid helium converter. The goal of the LD$_2$ moderator is to provide a high flux of cold neutrons into the superfluid, where they are then downscattered to become UCN. The liquid deuterium moderator has a 125 L volume, and experiences a heat load of 60 W for the design proton beam current of 40 $\mu$A. Cooling is provided by a distant cryocooler at higher elevation, in a thermosyphon loop with the moderator volume. The thermosyphon solution is unique in featuring no moving parts and single-phase (liquid) operation. This presentation will focus on the design of the liquid deuterium system, and the status and plans for this important component of the UCN source.
| Keyword-1 | neutron sources |
|---|---|
| Keyword-2 | electric dipole moment |
| Keyword-3 | fundamental symmetries |
