Absolute calibration of a multichannel plate detector for low energy O, O-, and O+

T. M. Stephen and B. L. Peko


Absolute detection efficiencies of a commercial multichannel plate detector have
been measured for O, O+, and O-, impacting at normal incidence for energies
ranging from 30Ð1000 eV. In addition, the detection efficiencies for O relative
to its ions are presented, as they may have a more universal application. The
absolute detection efficiencies are strongly energy dependent and significant
differences are observed for the various charge states at lower energies. The
detection efficiencies for the different charge states appear to converge at
higher energies. The strongest energy dependence is for O+; the detection
efficiency varies by three orders of magnitude across the energy range studied.
The weakest dependence is for O-, which varies less than one order of magnitude.

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Review of Scientific Instruments, Vol. 71 (3), 1355 - 1359, 2000