Note: Determining the detection efficiency of excited neutral atoms by a microchannel plate detector

Abstract

Improved ion detection efficiency of microchannel plate detectors Rev.

Laser-induced dissociative recombination of carbon dioxide

“…CO + and electrons, are guided to the multihit position-and time-sensitive detectors by a homogeneous dc field of 10.5 V/cm and a uniform magnetic field of 12 G. Excited neutral particles, e.g. O * , with an initial momentum vector pointing towards the detector are registered with a smaller detection angle as compared to that for charged particles [9,20,21]. The acceptance angle of our setup for neutral particles is about 70 degrees.…”

Visualizing and Steering Dissociative Frustrated Double Ionization of Hydrogen Molecules

“…For dissociative FDI of hydrogen molecules, the produced ionic fragment (H þ or D þ ) accelerated by the static electric field of the spectrometer (E s ∼ 12.7 V=cm) can be detected by the ion detector regardless of its ejection direction. However, the laser-created Rydberg atom (H Ã or D Ã ) can only be detected if it flies towards the ion detector and impinges on the microchannel plate (MCP) detector with an internal potential energy larger than the work function of the MCP [43]. Meanwhile, the freed electron accelerated by E s and guided by a weak magnetic field (B ∼ 11 G) can be detected by the electron detector at the other end of the spectrometer.…”