Fig. 5: Direction- and time-integrated count matrix \({{{\boldsymbol{{{\mathcal{C}}}}}}}\). | Communications Earth & Environment

Fig. 5: Direction- and time-integrated count matrix \({{{\boldsymbol{{{\mathcal{C}}}}}}}\).

From: Direct observations of negative ions on the Lunar surface by Chang'E-6

Fig. 5: Direction- and time-integrated count matrix $${{{\boldsymbol{{{\mathcal{C}}}}}}}$$ C .

The count matrix data are plotted against absolute energy-per-charge and mass bin number. Different features are identified: a a weak H− signal for energies between 100 eV/q and 400 eV/q; b a strong e− peak spanning all energies; and c a uniform signal for energies below 30 eV/q attributed to either or both O− and accidental coincidences.

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