The influence of SnO2 and CeO2 substrates on the photoemission of Cs3Sb cathodes is investigated. Using λ/4 SnO2 films it is possible to achieve an enhancement of the integral sensitivity up to 22%. Comparisons of the quantum efficiency over glass and substrate show that the enhanced sensitivity of the emitters is due to an increase of the photocurrent in the long‐wavelength region. The CeO2 substrates give rise to improvements of the integral sensitivity up to 32%. The increase of the photocurrent occurs in the λ‐region 400 to 700 nm. The results obtained with the substrates are discussed in a more general form. A detailed investigation of the factors governing the quantum efficiency is undertaken with the object of fitting the measuring results into the scheme of the factors and interpreting them in this way.
Es wird der EinfluB der Laserresonatorliinge auf Verlustkoeffizient und Energieoutput von YAG-Kristallen untersucht. Es zeigt sich, daB durch die Angabe zweier Verlustkoeffizienten und der Anderung des Laserwirkungsgrades, ermittelt bei verschiedenen Resonatorllingen, eine verbesserte Charakterisierung von YAG-Stliben moglich ist.The influence of resonator lengths on loss coefficient and on output energy of YAG crystals is investigated. It is shown that YAG rods are improved characterized by statement, of t,wo loss coefficients and change of laser efficiency, found at different resonator lengths.
The laser energy of two rubies of different optical quality is measured in the relaxation regime. The adjustment and length of the resonator is varied and the polarisation of the emission is changed definetely. The results are interpreted in terms of mosaic structure and substructure of the rubies.
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