Self-absorption and Phonon Pulse Shape Discrimination in Scintillating Bolometers

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 Detector readout, signal processing, and related technologies Poster session

Speaker

Geon-Bo Kim (Lawrence Livermore National Laboratory)

Description

Scintillating bolometers have traditionally employed phonon and photon readout to identify particle types from the ratio of the two signals. In addition, different phonon pulse shapes of electron and nuclear recoils have been observed, but improvements in particle discrimination have been focused on improved light collection or sensitivity. Here we show that observed pulse shape differences in the phonon signals can be explained by photon self-absorption in the scintillating crystal. We will present a model for scintillating bolometers with self-absorption and a single phonon readout that significantly simplifies the detector design. It enables an optimized detector design for particle discrimination at sub-keV energies.

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

Primary author

Geon-Bo Kim (Lawrence Livermore National Laboratory)

Presentation Materials