Absolute detection efficiencies of a microchannel plate detector for ions
- 1 July 1995
- journal article
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 6 (7) , 953-958
- https://doi.org/10.1088/0957-0233/6/7/015
Abstract
Absolute single-particle detection efficiencies of a microchannel plate (MCP) detector were determined by photo-ionization of atoms or molecules. The ionized heavy particles were detected in coincidence with the resulting electrons. This method allows the determination of detection efficiencies without a knowledge of the absolute event rates. We obtained the detection efficiencies for the ions H2+, D2+, HD+, H+, D+ and Ar+ in the impact energy range 0-5 keV. The detection efficiencies saturate above 3 keV and reach generally 41%. This value seems to reflect mainly the physically effective area of the MCP.Keywords
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