3–5 Dec 2025
CERN
Europe/Zurich timezone

MULTIPAC and PACBit - Third Generation TDPAC Spectroscopy

3 Dec 2025, 15:35
12m
222/R-001 (CERN)

222/R-001

CERN

200
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Submitted oral (In person) Session 3

Speaker

Bjorn Dorschel (Institut Fur Materialwissenschaft Universität Duisburg-Essen (DE))

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. Building on this advanced instrumentation, the dedicated control and analysis software PACBit enables high-performance data acquisition, streamlined experiment control, and efficient post-processing. An outline of the detector configuration is given, followed by an exposition on how the system increases the effective resolution beyond the 10-bit limit of the U5310A digitizer through advanced signal processing techniques. Operating in streaming mode, the data acquisition (DAQ) delivers high throughput and allows the collection of more data than in previous setups. Post-processing features include signal smoothing, removal of secondary pulses, precise timestamp calculation and integration. These processes are all automated, to achieve a real-time R(t) spectrum. 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.

Authors

Adeleh Mokhles Gerami (Institute for Research in Fundamental Sciences (IR)) Alexandre Pinho Dos Santos Souza (Instituto de Pesquisas Energeticas e Nucleares (BR)) Arnaldo Alves Miranda Filho (Instituto de Pesquisas Energeticas e Nucleares (BR)) Bjorn Dorschel (Institut Fur Materialwissenschaft Universität Duisburg-Essen (DE)) Mr Bruno Santos Santos Corrêa Constantin Lupascu (Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany) Ian Chang Jie Yap (Institut Fur Materialwissenschaft Universität Duisburg-Essen (DE)) Juliana Schell (Institut Fur Materialwissenschaft Universität Duisburg-Essen (DE)) Lars Laurin Baltensperger Magnus Hegelund (Department of Materials and Production, Aalborg University) Nicole Pereira De Lima (Instituto de Pesquisas Energeticas e Nucleares (BR)) Thanh Thien Dang (Institut Fur Materialwissenschaft Universität Duisburg-Essen (DE))

Presentation materials