Grand solar minima and maxima deduced from 10Be and 14C: magnetic dynamo configuration and polarity reversalF. Inceoglu, R. Simoniello, M. F. Knudsen, C. Karoff, J. Olsen, S. Turck-Chiéze and B. H. JacobsenA&A, 577 (2015) A20DOI: https://doi.org/10.1051/0004-6361/201424212