Speaker
Description
Neutron cooling in the TUCAN source is achieved through a three-stages system. First, room-temperature heavy water provides thermalization. This is followed by liquid deuterium at 20 K for further cooling, and finally by isopure helium-4 at 1 K, which enables superthermal ultracold neutron (UCN) conversion.
The liquid deuterium moderator was the final component of the source to be commissioned. In this presentation, I will describe the deuterium system, including its design, installation, and the safety requirements for its operation.
In 2025, two UCN production campaigns were conducted without the deuterium moderator, followed by two campaigns with it in operation. I will present a comparison of these campaigns, demonstrating the significant increase in the UCN production rate achieved with the addition of the liquid deuterium.