doi:10.1016/j.nima.2022.167913engAltenmüller, K.Biasuzzi, B.Castel, J. F.Cebrián, S.Dafni, T.Desch, K.Díez-Ibañez, D.Ferrer-Ribas, E.Galan, J.Galindo, J.García, J. A.García Irastorza, I.Kaminski, J.Luzón, G.Margalejo, C.Mirallas, H.Navick, X.F.Obis, L.Ortiz de Solórzano, A.von Oy, J.Papaevangelou, T.Pérez, O.Ruz, J.Schiffer, T.Schmidt, S.Segui, L.Vogel, J.K.X-ray detectors for the BabyIAXO solar axion searchART-2023-132435BabyIAXO is a helioscope under construction to search for an emission of the axion particle from the Sun. At the same time it serves as an intermediate stage towards the International Axion Observatory (IAXO). An integral component of this experiment is a low background X-ray detector with a high efficiency in the 1–10 keV energy range. Micromegas detectors are considered as baseline technology for BabyIAXO thanks to the relatively high efficiency and very low background level. Other detector technologies developed to reach better energy resolution while maintaining high efficiency and low background level are also under study. Inthis paper, we review the BabyIAXO design and present the analysis of data taken with he prototype of an IAXO Micromegas detector. A background level of 8.8 × 10−7 counts keV−1 cm−2 s−1 was reached.2023http://zaguan.unizar.es/record/12391610.1016/j.nima.2022.167913http://zaguan.unizar.es/record/123916oai:zaguan.unizar.es:123916info:eu-repo/grantAgreement/ES/AEI/CEX2019-000918-Minfo:eu-repo/grantAgreement/ES/AEI/FPA2016-76978-C3-1-Pinfo:eu-repo/grantAgreement/ES/AEI/PID2019-108122GB-C32info:eu-repo/grantAgreement/EC/H2020/788781/EU/Towards the detection of the axion with the International Axion Observatory/IAXOplusThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 788781-IAXOplusinfo:eu-repo/grantAgreement/EC/H2020/802836/EU/Axions and relatives across different mass scales/AxScaleThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 802836-AxScaleinfo:eu-repo/grantAgreement/ES/MICINN/Juan de la Cierva Program-IJC2019-040686-INuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1048 (2023), 167913 [4 pp.]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess