[Triumf-seminars] TRIUMF Colloquium today at 11:00

[TRIUMF Seminars]

Date/Time: Thu 2024-04-04 at 11:00

Location:  Auditorium          

Speaker:   Stephan Friedrich (LLNL)

Title:     Superconducting Sensors and Sterile Neutrinos

Abstract: The "Beryllium-7 Electron capture in Superconducting Tunnel junctions" ("BeEST") experiment searches for evidence of neutrino transitions to heavy mass eigenstates in the decay of Be-7. For this, Be-7 is implanted into superconducting tunnel junction (STJ) quantum sensors that precisely measure the recoil energy of the Li-7 daughter upon decay. Heavy sterile neutrinos would reduce the recoil energy and produce additional peaks in the spectrum as a signature. Phase-II f the BeEST experiment is currently providing the most stringent limits on the existence of sterile neutrinos in the 100-800 keV mass range. In Phase-III, the experiment is scaled from a single STJ sensor to a 36-pixel array to increase sensitivity and mitigate gamma-induced backgrounds. This talk will give and introduction to STJ quantum sensors and discuss preliminary results from phase-III of the BeEST experiment.

---
Remote Connection:
https://ubc.zoom.us/j/61845116230?pwd=UittbTVieHErdlFHT2ZHSE5SUUlvQT09

Meeting ID: 618 4511 6230
Passcode: 077824

Bring your own mug.

Students and postdocs are invited to meet with the speaker after the colloquium.

______________________________

General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures