Magnetic core plates

Air-core solutions and models are more precise and stable than of the magnetic cores. The experimental work done so far, also shows that the single coil setup is not only simpler to model and calculate, but is giving also much better results in the mentioned frequency band. Still, our experiments show that for some specific and limited low frequency band (e.g. in the 10 kHz region) the through-the-metal-plate two-coil setup [11] can give better absolute measurement result. 

A series of tests were performed at the AFC s National Reactor Testing Station in Idaho, starting in 1953. The reactor was situated outdoors, and was operated remotely. The core of the first version had fuel assembhes of aluminum and enriched uranium plates of the Materials Testing Reactor (MTR) type, installed in a water tank. One of the five control rods could be ejected downward and out of the core by spring action upon intermption of a magnet... 

Gland plate Three to four mm of MS or non-magnetic material, depending upon the number, sizes and type of cables (single core or multicore) it has to carry (Figure 13.33). 

FIGURE 6.3 Sequence developing chamber by Buncak 1 — support with mobile phase source (reservoir), 2 — holding frame, 3 — magnet holder, 4 — magnet, 5 — cover plate, 6 — TLC plate, 7 — wick with iron core, 8 — solvent entry. (From Buncak, P., GIT Fachz. Lab. (Suppl., Chromatographie), G-I-T-Verlag, Darmstadt, 3-8, 1982. With permission.)... 

Use Electronics, xerographic plates, TV cameras, photocells, magnetic computer cores, solar batteries (rectifiers, relays), ceramics (colorant for glass), steel and copper (degasifier and machinability improver), rubber accelerator, catalyst, trace element in animal feeds. 

Temperature and pressure both increase with depth in the Earth and control the composition and properties of the material present at various depths. The Earth comprises a number of layers, the boundaries between which are marked by relatively abrupt compositional and density changes (Fig. 1.1). The inner core is an iron-nickel alloy, which is solid under the prevailing pressure and temperature ranges. In contrast, the outer core is molten and comprises an iron alloy, the convection currents within which are believed to drive the Earth s magnetic field. The core-mantle boundary lies at c. 2900km depth and marks the transition to rocky material above. The mantle can be divided into upper and lower parts, although the boundary is quite a broad transitional zone (c.lOOCM-OOkm depth). It behaves in a plastic, ductile fashion and supports convection cells. The upper mantle layer from c.100 to 400 km depth is called the asthenosphere, and its convection system carries the drifting continental plates. 

Uses Electronics colorant for glass (ceramics) rectifiers relays solar batteries accelerator, vulcanizing agents for rubbers xerographic plates TV cameras magnetic computer cores catalyst trace element in animal feeds iron/copper/nickel/lead alloy ingred. photoconductor (photocopiers, photocells, temp, gauges)... 

These simulations are valid for the air-core coil based conductivity measurements with infinite size of metal plates, consisting of one or several metal layers. The infinite size is typically not very significant constraint for real-life measurements, as the eddy current electro-magnetic fields are decreasing quickly in the media. Only a few millimetres larger metal plate than the sensor s size is typically enough to have reasonably precise results. 

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