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Category:1986 births
Category:Indian male film actors
Category:Living people
Category:Male actors from Dehradun
Category:Bigg Boss contestantsThe invention relates to an improvement in the manufacture of superconducting devices and more particularly, in the construction of a superconducting microwave quantum interference device (SQUID).
A SQUID is a device which can be used to measure weak magnetic fields. SQUIDs have been used in the past in a large number of applications, especially in NMR spectroscopy, where it is desirable to measure the field produced by the sample. SQUIDs, in particular the flux-locked loop (FLL) SQUID, have been shown to have certain advantages over other types of magnetic field detectors (such as single electron transistors) and are now being used in a number of other applications. Most recently, SQUIDs have been adapted for the detection of weak magnetic fields in atomic physics, in particular with respect to the use of SQUIDs for measuring extremely weak magnetic fields produced by the hyperfine interaction of a single spin of an atom with a nuclei or as quantum mechanical phase qubits.
The flux-locked loop SQUID is a device that produces an output current which is directly proportional to the magnetic flux through the loop. This output current is then compared to a reference voltage, typically a voltage that is related to the output of a known local oscillator circuit. The difference between the two voltages is then amplified and fed back to control the operation of the local oscillator. In this manner, the loop is locked to the known reference signal.
In general, a SQUID is made up of three electrical conductors which are encircled by a fourth conductor, called the superconducting loop. The superconducting loop itself is made up of a superconducting conductor whose critical temperature, T.sub.c, is greater than the temperature at which the device operates. The magnetic flux through the superconducting loop, as well as any magnetic flux generated by external sources, are then coupled to the superconducting loop through the second and third conductors. The first conductor, the superconducting loop, is resistively shunted, so that the first conductor may be disconnected from the superconducting loop by passing a voltage across the first and be359ba680
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