Publication at Faculty of Mathematics and Physics |
2010
Abstract
This contribution presents details of the design of a novel apparatus for studying the associative detachment reaction $H + H^− \rightarrow H_2 + e^−$. We focus on investigating the confinement of H− ions in a linear radio-frequency octopole trap and on the possibility of cooling them by collisions with atoms of He buffer gas.
The possibility of using the octopole as a mass filter for calibration purposes is investigated. We further estimate the influence of the radio-frequency field on the measured energy of detached electrons.
Besides the ion optics, we discuss the focusing properties of a hexapole magnetic lens for H atoms.