Speaker
Description
The Beryllium Electron capture in Superconducting Tunnel junctions (BeEST) experiment searches for the signatures of heavy neutrino mass eigenstates by measuring the recoil energy of the Li-7 daughter nucleus from Be-7 electron capture decay. In Phase-II, BeEST has set leading limits on neutrino mixing to a heavy eigenstate in the 100-850 keV mass range using a single superconducting tunnel junction detector. The current Phase-III has expanded the BeEST experiment to a 32-pixel STJ array detector and increased the dose of implanted Be-7. In this poster, we present the status of the BeEST Phase-III and highlight the refined experimental and analytical techniques in Phase-III. We also discuss an improved analysis scheme using pulse shape discrimination enabled by a new continuous data acquisition system.
| Poster prize | No |
|---|---|
| Given name | In Wook |
| Surname | Kim |
| First affiliation | Lawrence Livermore National Laboratory |
| Institutional email | kim124@llnl.gov |
| Gender | Male |
| Collaboration (if any) | The BeEST Collaboration |
