Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster – Precision Spectroscopy of Atoms and Ions (joint session A/Q)
Q 27.6: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG
Digital Pulse Shape Analysis for Metallic Magnetic Calorimeters (MMC) — •J. H. Walch1,2,3, D. A. Schnauß-Müller1,2,3, M. O. Herdrich1,2,3, Ph. Pfäfflein1,2,3, G. Weber1,2,3, D. Hengstler4, A. Fleischmann4, Ch. Enss4, and Th. Stöhler1,2,3 — 1HI-Jena — 2IOQ, FSU — 3GSI — 4KIP
In the recent years, MMCs have emerged as excellent single photon detectors, exhibiting a broad spectral acceptance range from a few to hundreds of keV and a high energy resolution of E/Δ E (FWHM) ≈ 6000 [J. Geist. PhD thesis, 2020]. Together with their fast rise time, they provide a superb opportunity for fundamental research in atomic physics. The MMC detector absorbs an incident photon. The subsequent heat up of an absorber-sensor pair leads to a change in magnetisation of the sensor generating a signal dependent on the photons energy. The shape depending on the intrinsic detector response, additional noise and artefacts from various sources. To achieve the full detector performance and accurately measure incident photon energies, it is necessary to extract the relevant pulse features while suppressing noise contributions. Several techniques to maximise statistical information involving finite impulse response filters have been explored. Additional correction techniques are needed to mitigate the effects of integral nonlinearities and temperature drift of ADCs gain behaviour. This work presents an overview of the involved steps and compare several digital filters with regard to their resolving power. In particular: a Moving Window Deconvolution based algorithm presented by M. O. Herdrich and the Optimal filter as described e.g. by A. Fleischmann.
Keywords: Metallic magentic Calorimeter (MMC); Pulse Shape Analysis; Precision X-ray Spectroscopy; Heavy, Highly Charged Ions; Ion Storage Rings