Erlangen 2022 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Precision spectroscopy of atoms and ions (joint session A/Q)
A 20.15: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
maXs100: A 64-pixel Metallic Magnetic Calorimeter Array for the Spectroscopy of Highly-Charged Heavy Ions — •S. Allgeier1, A. Abeln1, M. Friedrich1, A. Gumberidze2, M.-O. Herdrich2,3,4, D. Hengstler1, F. M. Kröger2,3,4, P. Kuntz1, A. Fleischmann1, M. Lestinsky2, E. B. Menz2,3,4, Ph. Pfäfflein2,3,4, U. Spillmann2, B. Zhu4, G. Weber2,3,4, Th. Stöhlker2,3,4, and Ch. 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.
We present the MMC array maXs-100, which was used to investigate electron transitions in U90+ at CRYRING@FAIR. The detector features 8x8 pixels with a detection area of 1 cm2 and a stopping power of 40 % for 100 keV X-rays. We discuss details of the two detector systems used during the beam time, including the cryogenic setup and magnetic shielding. An absolute energy calibration with eV-precision at 100 keV as well as an energy resolution of 40 eV (FWHM) at 60 keV were demonstrated, allowing for high-precision X-ray spectroscopy.
This research has been conducted in the framework of the SPARC collaboration, experiment E138 of FAIR Phase-0 supported by GSI. We acknowledge substantial support by ErUM-FSP APPA (BMBF no 05P19VHFA1).