Extended Data Fig. 1: Back scatter electron (BSE) and in-beam secondary electron (IbSE) images of the front face of Itokawa particle RA-QD02-0279 and resulting APT specimens. | Nature Astronomy

Extended Data Fig. 1: Back scatter electron (BSE) and in-beam secondary electron (IbSE) images of the front face of Itokawa particle RA-QD02-0279 and resulting APT specimens.

From: Solar wind contributions to Earth’s oceans

Extended Data Fig. 1

a, BSE image of the front face of Itokawa particle RA-QD02-0279 after Cr coating. b, BSE image of the front face of Itokawa particle RA-QD02-0279 after Ion beam Pt deposition in preparation for sample extraction for APT. The red circles indicate where the APT lift outs were extracted from the wedge. C) IbSE (left) and BSE (right) image of needle (D) half way through annular milling. The Pt protective layer is visible as well as the Cr layer. Annular milling was continued until the Pt was removed but leaving the Cr cap. D–H) IbSE (left) and BSE images (right) of each APT needle the Cr cap is visible at the apex of each tip in the BSE images as well as the Pt weld at the base.

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