Regensburg 2004 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 8: Postersitzung I: Supraleitung

TT 8.24: Poster

Montag, 8. März 2004, 14:30–19:00, Poster A

Design considerations for large area magnetic calorimeters and detector arrays — •T. Daniyarov¹, A. Burck¹, M. Linck¹, H. Rotzinger¹, A. Fleischmann¹, and C. Enss² — ¹Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, 69120 Heidelberg — ²Department of Physics, Brown University, Providence, RI 02912, USA

Only recently it was demonstrated that energy dispersive x-ray detectors based on the concept of metallic magnetic calorimeters can achieve resolving powers close to E/δ E=2000. Due to the calorimetric detection scheme magnetic calorimeters are not limited to ionizing radiation and do not suffer from dead layers at the surface. This combination of properties is attractive for a large number of applications, provided that the active area of the detector is large enough. We present sensor geometries, which allow for the fabrication of large area magnetic calorimeters and discuss the optimization of flux coupling to the dc-SQUID magnetometer used for the inductive readout of such detectors. Additionally, an array of detectors can be used to increase the total cross section, but this option also adds complexity to the device. We address the problem of thermal and magnetic crosstalk between the sensors of a detector array and propose promising sensor and pickup loop designs to meet the requirements for high resolution particle detection.