Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 77: Search for Dark Matter 4
T 77.4: Talk
Wednesday, March 23, 2022, 17:00–17:15, T-H36
Current Status of the BRASS-P Experiment — •Fayez Bajjali1, Le Hoang Nguyen1, Dieter Horns1, Andrei Lobanov1,2, Artak Mkrtchyan1, Sven Dornbusch2, Christoph Kasemann2, Martin Tluczykont1, and Marko Ekmedžić1 — 1Institute of Experimental Physics - University of Hamburg — 2Max-Planck-Institute for Radio Astronomy - Bonn
Axions and Hidden Photons (HPs) are among the best motivated candidates for explaining the enigmatic nature of the dark matter. These weakly interacting slim particles (WISPs) have a small mass and can be detected via electromagentic (EM) radiation arising from their interaction with normal matter, photons, and magnetic field. The concept for Broadband Radiometric Axion/ALP Searches (BRASS) provides a pioneering experimental setup for WISP searches in the range of 10-10000μeV. The prototype setup BRASS-P is currently being constructed at the University of Hamburg. It combines permanently magnetized conversion panels producing the EM signal from passages of WISPs, a parabolic mirror focusing the EM signal, a cryogenic 12-18 GHz heterodyne receiver, and a broadband digitizing backend DBBC3 for detecting and processing the signal.
The structure of the conversion panels and the measurement of the static magnetic field will be presented. The setup and calibration procedures employed for the 12-18 GHz receiver and the DBBC3 digitizer will be discussed. Finally, preliminary results from the first science run carried out for searching for HPs in the frequency range of 12-16 GHz will be presented.