Abstract
A trapped-ion electron diffraction (TIED) apparatus has been developed. By sufficient suppression of the background signals originating from electrons scattered by residual gases and those originating from the back-scattered and secondary electrons generated at a Faraday cup, the gas electron diffraction pattern of CCl3+, generated through the dissociative ionization of CCl4 by near-IR ultrashort intense laser pulses, is recorded using the TIED apparatus at the electron acceleration voltage of 18.8 keV. The determined internuclear distances, r(C-Cl) = 1.66(2) Å and r(Cl⋯Cl) = 2.87(2) Å, which are consistent with theoretically calculated values, confirm that CCl3+ takes a planar geometry.
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