Probing the axion-nucleon coupling with the next generation of axion helioscopes - Di Luzio, Luca; Galan, Javier; Giannotti, Maurizio; Irastorza, I.; Jaeckel, Joerg; Lindner, Axel; Ruz, Jaime; Schneekloth, Uwe; Sohl, Lukas; Thormaehlen, Lennert J.; Vogel, Julia K. (DESY, 2021)