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A: Fachverband Atomphysik

A 3: XUV/X-ray spectroscopy I

A 3.7: Vortrag

Montag, 6. März 2017, 16:15–16:30, N 2

State-of-the-art MMC detector arrays for X-ray spectroscopy — •D. Hengstler¹, F. Mücke¹, J. Geist¹, M. Keller¹, M. Krantz¹, C. Schötz¹, R. Pons¹, S. Kempf¹, L. Gastaldo¹, A. Fleischmann¹, C. Enss¹, T. Gassner^2,3, K.H. Blumenhagen^2,3, R. Märtin^2,3, G. Weber^2,3, and Th. Stöhlker^2,3,4 — ¹KIP, Heidelberg University — ²Helmholtz-Institute Jena — ³GSI Darmstadt — ⁴IOQ, Jena University

Metallic magnetic calorimeters (MMCs) are energy dispersive X-ray detectors which provide a very good energy resolution over a large dynamic range combined with an excellent linearity. MMCs are operated at millikelvin temperatures and convert the energy of an incoming X-ray into a temperature rise which is monitored by a paramagnetic temperature sensor. The resulting change of sensor magnetization is read out by a SQUID and serves as a measure for the energy input. We developed several micro-fabricated one- and two-dimensional detector arrays optimized for energies up to 20, 30 and 200 keV providing energy resolutions as good as 1.6 eV, 7 eV and 26 eV, respectively. The detectors are operated in a mobile dilution refrigerator. We discuss the performance of our detectors and show results of our most recent 8x8 pixel detector array providing an active detection area of 4 mm x 4 mm. We present promising results of first beamline experiments at ESR@GSI showing that MMCs are an ideal tool for future precision experiments at FAIR as well as new detector designs optimized for upcoming beamtimes at Cryring@ESR.