HeRALD, a new detector concept for light dark matter direct detection

23 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Low Temperature Detector Development and Physics Poster session

Speaker

Alessandro Serafin (University of Massachusetts (Amherst))

Description

We present HeRALD (Helium Roton Apparatus for Light Dark matter), a new detector concept using superfluid helium as the target material for sub GeV dark matter nuclear recoil. Helium, in its superfluid state, promises a good kinematic matching to low mass dark matter with several channels for reading out nuclear recoils. The main idea of this detector design is that superfluid helium allows long-range ballistic propagation of phonon and roton excitions which, at the liquid-vacuum interface, can produce quantum evaporated single 4He atoms then sensed via their adsorption energy onto large-area low-threshold calorimetery. I will describe the R&D of this technique and I will discuss its capability of reaching recoil energy thresholds below 10 eV along with the sensitivity projections for a small scale detector (~1Kg) and its possibility of exploring new parameter space.

Less than 5 years of experience since completion of Ph.D N
Student (Ph.D., M.Sc. or B.Sc.) N

Primary author

Alessandro Serafin (University of Massachusetts (Amherst))

Co-authors

Daniel McKinsey (UC Berkeley) Scott Hertel (University of Massachusetts (Amherst)) Andreas Biekert (UC Berkeley) Junsong Lin (UC Berkeley) Doug Pinckney (University of Massachusetts (Amherst)) Roger Romani (UC Berkeley) Vetri Velan (UC Berkeley)

Presentation Materials