Speaker
Dr
Sergey pereverzev
(LLNL)
Description
Abstract.
In materials used for quantum and superconducting detectors several classes of objects demonstrate glass-like behavior at low temperatures. These are non-equilibrium configurations of surface and interfacial charges, magnetic moments of impurities, nuclear dipole magnetic and quadrupole electric moments, quantized vortexes, etc. Electromagnetic signals applied to device and leaking from the hot environment, as well as ionizing radiation, are capable to deposit energy into “glassy” materials. As energy bearing structures interact directly and indirectly through electrons system and lattice deformations, avalanche relaxation processes could be possible - which bring the question about self-organized criticality effects. A review of literature and measurements in detectors at LLNL reveal patterns among ionization detectors backgrounds and noises in superconducting detectors which invited questions about possible effects in materials under energy flow. Side-by side comparison of very different detectors could lead to better understanding of common problems and see how technologies are merging in experiments studying space microwave background, searches for axions and coherent scatter of low energy neutrinos with low and ultra-low temperature detectors.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344; we acknowledge LDRD grant 17-FS-029.
Primary author
Dr
Sergey pereverzev
(LLNL)
