A trap for positive ions (H+, Cl+, HCl+) is created within a time-of-flight mass spectrometer. The yields of secondary electrons and negative ions (HCl−, H−) formed due to forward and backward scattering of positive ions by steel wire at different kinetic energies (200–750 eV) are measured.
- ion collisions with surface
- resonance-enhanced multiphoton ionization
- time-of-flight mass-spectrometry