Structure and fluctuations of a slow ICME sheath observed at 0.5 au by the Parker Solar Probe E. K. J. Kilpua, S. W. Good, M. Ala-Lahti, A. Osmane, S. Pal, J. E. Soljento, L. L. Zhao and S. Bale A&A, 663 (2022) A108 Published online: 18 July 2022 DOI: 10.1051/0004-6361/202142191