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Q: Fachverband Quantenoptik und Photonik

Q 19: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)

Q 19.7: Vortrag

Dienstag, 7. März 2023, 12:30–12:45, F303

Metallic magnetic calorimeters: Novel detectors for high-resolution X-ray spectroscopy — •D. Hengstler¹, A. Abeln¹, S. Allgeier¹, A. Brunold¹, L. Eisenmann¹, M. Friedrich¹, A. Gumberidze², M.-O. Herdrich^2,3,4, F. Kröger^2,3,4, P. Kuntz¹, A. Fleischmann¹, M. Lestinsky², E. Menz^2,3,4, A. Orlow¹, Ph. Pfäfflein^2,3,4, U. Spillmann², B. Zhu⁴, G. Weber^2,3,4, Th. Stöhlker^2,3,4, and C. Enss¹ — ¹KIP, Heidelberg University — ²GSI, Darmstadt — ³IOQ, Jena University — ⁴HI Jena

Metallic magnetic calorimeters (MMCs) are energy-dispersive X-ray detectors which provide an excellent energy resolution over a large dynamic range combined with a very good linearity. They are operated at mK temperatures and convert the energy of each incident photon into a temperature rise which is monitored by a paramagnetic sensor.

To probe QED, we developed the 2-dimensional detector array maXs-100. The detector features 8x8 pixels with an active detection area of 1 cm² and a stopping power of 40 % at 100 keV. An absolute energy calibration on eV-level as well as an energy resolution of 40 eV (FWHM) at 60 keV were demonstrated. We discuss the detector performance during the recent beam time at the ion storage ring CRYRING@FAIR (Darmstadt), where electron transitions within highly charged, He-like U⁹⁰⁺ ions were studied and present ongoing detector improvements and possible future applications.

This work was conducted in the framework of the SPARC collaboration, exp. E138 of FAIR Phase-0 supported by GSI. We acknowledge substantial support by ErUM-FSP APPA (BMBF no 05P19VHFA1).