Bonn 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Bonn musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 77: Axion like particles II
T 77.9: Vortrag
Donnerstag, 2. April 2020, 18:35–18:50, H-HS XV
Cryogenic Setup for the Operation of Metallic Magnetic Calorimeters in BabyIAXO — •D. Hengstler1, A. Abeln1, D. Unger1, U. Schneekloth2, A. Fleischmann1, L. Gastaldo1, and C. Enss1 — 1KIP, Heidelberg University — 2DESY
The International Axion Observatory (IAXO) aims for the detection of solar axions. This helioscope will feature a 20 m long magnet pointing to the Sun with a magnetic field of up to 6 T in which axions could be converted to X-rays. An X-ray optics will focus the X-rays produced in a bore of 60 cm diameter to a detector positioned in the focal plane.
Towards IAXO a smaller version of the helioscope will be developed to fix the technologies for the final experiment. This project goes under the name babyIAXO and will be located at DESY, Hamburg. For babyIAXO, we propose to use metallic magnetic micro-calorimeters as alternative X-ray detectors. This type of energy-dispersive particle detectors has not only been shown to achieve excellent energy resolutions down to 1,6 eV at 6 keV but also provides a quantum efficiency up to 100 % and a low background level, both being essential for rare-event searches. To reach the necessary operating temperatures of around 20 mK, magnetic micro-calorimeters are typically operated in a dry, pulse-tube cooled 3He/4He dilution refrigerator.
We discuss the technological challenges that arise from mounting the cryogenic setup at the helioscope and suggest possible solutions to them. In particular, we present a study for operating a dry dilution refrigerator that is tilted with respect to the gravitational field axis and experiences vibrations due to the tracking of the Sun.