Speaker
Joanna Wuko
(University of Massachusetts Amherst)
Description
HeRALD (Helium Roton Apparatus for Light Dark Matter) searches for sub-GeV dark matter-nucleon scattering in a $^4$He target. Phonons from an atomic recoil trigger the evaporation of $^4$He atoms into the vacuum, which are then detected calorimetrically using a Transition Edge Sensor (TES) array. Here I will discuss recent R&D using a two-channel evaporation sensor. The multi-channel readout allows the construction of a coincidence requirement which may mitigate the ubiquitous Low Energy Excess (LEE) background.
Primary author
Joanna Wuko
(University of Massachusetts Amherst)
