AUTHOR=Pugnat Pierre , Camus Philippe , Kwon Ohjoon , Ballou Rafik , Bruyère Cyril , Byun Heesu , Chung Woohyun , Grenet Thierry , Perrier Pierre , Semertzidis Yannis K. , Talarmin Arthur , Vessaire Jérémy 

TITLE=GrAHal-CAPP for axion dark matter search with unprecedented sensitivity in the 1–3 μeV mass range

JOURNAL=Frontiers in Physics

VOLUME=Volume 12 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2024.1358810

DOI=10.3389/fphy.2024.1358810

ISSN=2296-424X

ABSTRACT=A collaboration between CNRS-Grenoble and IBS-CAPP Daejeon plans to build a Sikivie's type haloscope for axion/ALPs dark matter search at the Dine-Fischler-Srednicki-Zhitnitskii (DFSZ) sensitivity for the 300-600 MHz range. It will be based on the large bore superconducting "outsert" coil of the Grenoble hybrid magnet providing a central magnetic field up to 9 T in 810 mm warm bore diameter. This magnet has just been successfully powered up to 8.5 T achieving the first step of the electrical commissioning phase. The design principles of the cryostat with its double dilution refrigerators to cooldown below 50 mK, the light Cu RF-cavity of 700 mm diameter together with its tuning rod(s) and first stages of the measurement chain, are presented. Perspectives for the targeted sensitivity assuming less than 2-year integration time is given.