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A cover meter is an instrument to locate rebars and measure the exact concrete cover. Rebar detectors are less sophisticated devices that can only locate metallic objects below the surface. Due to the cost-effective design, the pulse-induction method is one of the most commonly used solutions. [1]
Relaxation occurs when reversal of magnetization by domain wall motion is thermally activated and is dominated by magnetic viscosity. [22] The increasing value of coercivity at high frequencies is a serious obstacle to the increase of data rates in high- bandwidth magnetic recording, compounded by the fact that increased storage density ...
USS Jimmy Carter in the magnetic silencing facility at Naval Base Kitsap for her first deperming treatment RMS Queen Mary arriving in New York Harbor, 20 June 1945, with thousands of U.S. soldiers – note the prominent degaussing coil running around the hull Control panel of the MES-device ("Magnetischer Eigenschutz" German: magnetic self-protection) in a German submarine Close-wrap deperming ...
Another kind of IRM can be obtained by first giving the magnet a saturation remanence in one direction and then applying and removing a magnetic field in the opposite direction. [5] This is called demagnetization remanence or DC demagnetization remanence and is denoted by symbols like M d (H), where H is the magnitude of the field. [8]
In electromagnetism, the magnetic susceptibility (from Latin susceptibilis 'receptive'; denoted χ, chi) is a measure of how much a material will become magnetized in an applied magnetic field. It is the ratio of magnetization M ( magnetic moment per unit volume ) to the applied magnetic field intensity H .
The goal was to preserve the materials of the generator (walls and electrodes) while improving the limited conductivity of such poor conductors to the same level as a plasma in thermodynamic equilibrium; i.e. completely heated to more than 10,000 kelvins, a temperature that no material could stand.
A switchable magnetic device usually consists of a magnetic circuit with permanent magnets. By moving some parts of this circuit, the magnetic flux can be directed within the device (off position) or externally (on position). [3] One type of magnetic switchable device is made from two blocks of iron, with a round cavity bored through the center.
However, care has to be taken not to produce a field that exceeds the coercivity of the permanent magnets used, as this can result in demagnetization of the cylinder and the production of a much lower field than intended. [18] [19] Three designs (A) (B) (C) producing uniform magnetic fields within their central air gap