Helios 2 observations of solar wind turbulence decay in the inner heliosphere L. Sorriso-Valvo, R. Marino, R. Foldes, E. Lévêque, R. D’Amicis, R. Bruno, D. Telloni and E. Yordanova A&A, 672 (2023) A13 Published online: 23 March 2023 DOI: 10.1051/0004-6361/202244889