Fig. 7: Trapped electrons and negative hydrogen plus electrons in slow dump regime.
From: Adaptable platform for trapped cold electrons, hydrogen and lithium anions and cations

Comparison of slow dumps for a sample trapped at earlier times (60–90 µs after ablation) comprised only of \({{{{{{\rm{e}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) (in red), to sample comprised of \({{{{{{\rm{e}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) and \({{{{{{\rm{H}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) (in blue) trapped at the proper \({{{{{{\rm{H}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) trapping time 100 µs after ablation. In these conditions, the ratio of integrated counts results in 2.6 times more \({{{{{{\rm{H}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) than \({{{{{{\rm{e}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) trapped at the optimized \({{{{{{\rm{H}}}}}}}^{{{{{{\boldsymbol{-}}}}}}}\) trapping time. The energy distributions are similar.