W. Baumgartner

Das Elmikon, ein elektromechanischer Bildverstärker und Bildwandler

SummaryProceeding from some basic ideas of the known Eidophor System, the conception of the Elmicon, a new type of image amplified and converter, is derived. A picture signal influencesan electric field by its action on a photoconductor. The electric field itself produces deformations of a jellylike substance and controls in this way the light flux of a Schlieren system. Following a general discussion of the underlying ideas, the practical results hitherto obtained are reported.

Zum Stromrauschen von Halbleitern

SummaryThe wellknown trapping of electrons and holes seems to give an explanation of the current noise in semiconductors. It is pointed out how especially the magnitude and low frequency dependence of the noise power can be understood; the possibility of a strong correlation between low frequency noise and photoconductive properties of semiconductors is emphasized.

Zum Vervielfacher-Raster (Channel Multiplier Arrays) II

ZusammenfassungDie Bedingungen für den Betrieb eines Rohrvervielfacher-Rasters (RVR) werden untersucht. Der Bereich linearer Verstärkung wird unter Berürcksichtigung der Wärmeentwicklung im RVR angegeben. Die Bildübertragung wird frequenzmässig analysiert und Messbedingungen zur Bestimmung der Modulations-und der Kontrastübertragungfunktion werden abgeleitet.SummaryConsiderations are made relating to the operational properties of channel electron multiplier arrays. The range of linear amplification is indicated when the production of Joules heat is taken into account. The image formation is analyzed in the spatial frequency domain and conditions are deduced for the measurement of the modulation transfer function and of the contrast transfer function.

Zur Messtechnik verrauschter Photoströme

Considering the Laplace transform of the two multiplying zones kinetic equations, taking account of the neutron transfer time distribution, we show that the ratio between the neutron evolution function integral of the active zone and that of the passive one is a useful value. For symmetrical systems (two identical zones) in particular, this ratio allows us to obtain the ratio between the whole reactivity and the coupling reactivity, and even the whole reactivity (in

Antimon-Lithium-Photokathode

) in some cases.