TOF ion charge state spectrum after 20 ms of ionization including injection. .
TOF ion charge state spectrum after 200 ms of ionization. .
TOF ion charge state spectrum after 1.1 s of ionization. .
Mean Au ion charge state vs ionization time. Squares—electron injection energy , diamonds—electron injection energy , and circles—electron injection energy .
Au ion yield and TOF spectra (mean ) for various injection time of the cooling (CO) gas. . Total ionization time is . The injection time for cooling gas, as shown on corresponding curves, , , , and .
Au ion yield vs cooling time. .
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