BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Measurements of the TUCAN Vertical UCN Source Heat Load Response DTSTART;VALUE=DATE-TIME:20210209T221500Z DTEND;VALUE=DATE-TIME:20210209T223000Z DTSTAMP;VALUE=DATE-TIME:20260907T025649Z UID:indico-contribution-1733@nyx.physics.mcgill.ca DESCRIPTION:Speakers: Sean Hansen-Romu (University of Manitoba)\nThe TUCAN collaboration is developing a dense source of Ultracold neutrons (UCN) th at will be used in a neutron Electric Dipole Moment (nEDM) experiment\, wi th a goal sensitivity of 10$^{(-27)}$ e*cm which is 10 times more precise than the best measurement to date. UCNs are neutrons with energies below 3 00 neV\, that are travelling with speeds less than 30 km/h. In order to c arry out a world-leading nEDM experiment higher densities of UCN need to b e produced. The TUCAN UCN are produced by cooling spallation neutrons to cold temperatures in successive layers of increasingly cold moderator\, wh ere the UCN production layer is a liquid He-II vessel\, where cold neutron s (~1 meV) down scatter to UCN energies (~100 neV) by interactions with ph onons and rotons in the fluid. The UCN production becomes more efficient when the He-II is kept at temperatures below 1~K\, which is difficult beca use of the heat flux from the spallation target. Critical to the performan ce of the superfluid helium UCN source is the temperature of the superflui d and its response to heat input. The TUCAN collaboration aims to achieve their goal by developing a next generation UCN source based on superfluid helium. To benchmark the design of the new He-II source\, heater tests we re performed\, and a model of the heating of the source was developed. I n this talk\, I will present the simple heating model that was developed\, and how well the heater test measurements matched this model.\n\nhttps:// nyx.physics.mcgill.ca/event/253/contributions/1733/ LOCATION:Virtual Meeting URL:https://nyx.physics.mcgill.ca/event/253/contributions/1733/ END:VEVENT END:VCALENDAR