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The caesium and potassium magnetometers are typically used where a higher performance magnetometer than the proton magnetometer is needed. In archaeology and geophysics, where the sensor sweeps through an area and many accurate magnetic field measurements are often needed, caesium and potassium magnetometers have advantages over the proton ...
A low field vector-helium magnetometer was equipped on the Mariner 4 spacecraft to Mars like the Venus probe a year earlier, no magnetic field was detected. [16] Mariner 5 used a similar device For this experiment a low-field helium magnetometer was used to obtain triaxial measurements of interplanetary and Venusian magnetic fields. Similar in ...
The International Real-time Magnetic Observatory Network (INTERMAGNET) is a world-wide consortium of institutes operating ground-based magnetometers recording the absolute level of the Earth's time-varying magnetic field, [2] [3] [4] to an agreed set of standards. INTERMAGNET has its roots in discussions held at the Workshop on Magnetic ...
A magnetic anomaly detector (MAD) is an instrument used to detect minute variations in the Earth's magnetic field. [1] The term typically refers to magnetometers used by military forces to detect submarines (a mass of ferromagnetic material creates a detectable disturbance in the magnetic field).
A magnetometer gives serious evidence that the Alligator Jr., a prototype craft that led to the U.S. submarine fleet, may have been found.
A SQUID (superconducting quantum interference device) is a very sensitive magnetometer used to measure extremely weak magnetic fields, based on superconducting loops containing Josephson junctions. SQUIDs are sensitive enough to measure fields as low as 5×10 −18 T with a few days of averaged measurements. [ 1 ]
There are three main types of magnetometer used to measure magnetic anomalies: [2]: 162–164 [3]: 77–79 The fluxgate magnetometer was developed during World War II to detect submarines. [3]: 75 [4] It measures the component along a particular axis of the sensor, so it needs to be oriented. On land, it is often oriented vertically, while in ...
When a magnet (generally an electromagnet creating a varying frequency field) creates eddy currents in the material, the eddy currents generate another magnetic field in the material which can be sensed by the magnetometer. If there is no flaw or crack in the pipeline, the magnetic field from the eddy current shows a constant pattern as it ...