Absolute detection efficiencies of a microchannel plate detector for ions

Abstract

Absolute single-palticle 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 H' , D;, H D ' , Ht, Dt and Ar' in the impact energy range 0-5 keV. The detection ekiencies saturate above 3 keV and reach generally 41%. This value seems to reflect mainly the physically effective area of the MCP.

Characterization of ion emission of an extreme ultraviolet generating discharge produced Sn plasma

“…When the ion impact energy is sufficiently high ͑Ͼ3 keV͒ heavy ions and low mass ions are detected with equal detection efficiency. [18][19][20] From this it follows that the signal intensity of ions of different species can be compared. However, because the detection efficiency may differ for particles with different kinetic energies, only the signal of ions with equal energy and E kin Ͼ 3 keV can be analyzed.…”

Gated pinhole camera imaging of the high-energy ions emitted by a discharge produced Sn plasma for extreme ultraviolet generation

“…13 Moreover, it has been shown that when the ion impact energy is sufficiently high ͑Ͼ3 keV͒, heavy ions are detected with equal efficiency as low mass ions. [14][15][16] This justifies that with the use of the gated MCP, time-resolved images can be made of the ion beam.…”

A new Channeltron-detector setup for precision mass measurements at ISOLTRAP

“…The efficiency for the detection of low energy ions (few keV) with a Micro Channel Plate (MCP) is only 30% [12][13][14]. This can be improved by converting the ions into electrons, which are easily detected with up to 90% efficiency (see Fig.…”