Absolute detection efficiency of a ceramic-channel electron multiplier in the soft x-ray region.
The photon detection efficiency of a ceramic-channel electron multiplier (Ceratron) has been measured on an absolute scale from 20 to 78 A using monochromatized synchrotron radiation. The measured efficiency was several percent at these wavelengths. Its wavelength dependence shows a gradually increasing trend for wavelengths longer than 28 A. The efficiency showed two maxima at -23 and 27 A, which are presumed to originate from the O-K absorption and the Ti-L absorption, respectively. Optimization of the detection efficiency is discussed.
Suzuki
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Saito
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