Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 28: Poster - Complex Fluids, Granular Matter, Glasses

DY 28.13: Poster

Dienstag, 8. März 2016, 18:15–21:00, Poster C

Novel readout system and online analysis of dielectric two-pulse echoes — •Andreas Schaller, Sergey Tsurkan, Andreas Reiser, Andreas Fleischmann, and Christian Enss — Kirchhoff-Institut für Physik, Universität Heidelberg

The low temperature properties of glasses are governed by atomic tunneling systems. These tunneling systems can couple resonantly to electric fields and can be studied by phase coherent methods such as two-pulse polarization echo measurements using a reentrant cavity microwave resonator with a resonance frequency of approximately 1 GHz.

We built up a new fully automated data acquisition and analyzing system for the measurement of two-pulse polarization echoes with high accuracy. The new setup allows for measurements at shorter pulse separation-times and for a real-time frequency domain data analysis, which allows us to reject unwanted contributions to the integrated echo amplitude stemming from external disturbances. We will discuss the new setup and data acquisition system. In addition we will show results obtained for BK7 glass.