Speaker
Description
With its unique combination of an external magnetic field of up to 8.5 Tesla and the ability to heat and cool samples during measurements, the MULTIPAC Time-Differential Perturbed Angular Correlation (TDPAC) setup creates new possibilities for studying materials and their phase transitions [INTC2020] [INTC2023]. Building on this advanced instrumentation, the dedicated control and analysis software PACBit enables high-performance data acquisition, streamlined experiment control, and efficient post-processing. A brief outline of MULTIPAC is given, followed by an exposition of the used detector configuration. Operating in streaming mode with parallel HDF5, the data acquisition (DAQ) delivers high throughput and allows the collection of more data than in previous setups. This increased data rate enables the application of stricter coincidence selection rules while maintaining a large number of events, thereby improving statistical accuracy, reducing background noise, and enhancing measurement reliability. Post-processing features include signal smoothing, precise timestamp calculation, and automatic removal of secondary pulse signals. Finally, a coincidence search algorithm is presented that exploits the increased dataset to deliver more accurate event correlations, paving the way for better experimental results and new opportunities in high-resolution TDPAC spectroscopy.
[INTC2020] D. C. Lupascu, J. Schell, T. T. Dang, M. Schmuck. CERN-INTC-2020-011 / INTC-I-212. Letter of Intent to the ISOLDE and Neutron Time-of-Flight Committee (2020). https://cds.cern.ch/record/2706092/files/INTC-I-212.pdf
[INTC2023] J. H.-Schell, D. C. Lupascu, et al. CERN-INTC-2023-012 / INTC-I-249. Letter of Intent to the ISOLDE and Neutron Time-of-Flight Committee (2023). https://cds.cern.ch/record/2845935/files/INTC-I-249.pdf