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Direct Losses of Injected Particles in Torsatrons/Heliotrons
Direct Losses of Injected Particles in Torsatrons/Heliotrons

... harmonics? What values of currents in TF or MF coils could generate distant harmonics, favourable from the view point of particle confinement? The search for unswers to the above mentioned questions can be simplified on the base of the so-called “bounce-averaged” approach. To use this approach, it i ...
Laboratory 1. Introduction: laboratory thematic
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... The Capacitor: A capacitor is an electrical device that can store energy in the electric field between a pair of closely-spaced conductors (called 'plates'). When voltage is applied to the capacitor, electric charges of equal magnitude, but opposite polarity, build up on each plate. Capacitors are u ...
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...  Discuss, in detail, the concept of electricity, electrical circuits, and magnetism.  Describe specific examples of electricity and magnetism and their uses.  Discuss the relationship between electricity and magnetism.  Discuss the concept of an electromagnet and how it is formed.  Cite your te ...
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... The center of the square is equidistant from all four wires. Thus, at the center of the square, the magnetic field produced by each wire has equal magnitude. Now consider the directions of each magnetic field. If we apply the right-hand rule to wires 2 and 4, we see that they produce magnetic fields ...
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... 6. An LRC series circuit is connected to 120 V (rms) and 60 Hz ac power supply. In the circuit R =200 Ω, L=2 H, and C =0.5 µF. a. Find the maximum voltage supplied to the circuit. b. Find the total impedance of the circuit. c. Find the maximum value of the current in the circuit. d. Find the phase ...
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... Note that the magnetic field and number of turns are inversely proportional. To produce the same emf at the same frequency with half the number of coils it would be necessary to double the magnetic field. 54. The four electrical circuits shown in the figure at the right have identical batteries, res ...
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... A magnetic field, increasing in time, passes through the blue loop An electric field is generated “ringing” the increasing magnetic field Circulating E-field will drive currents, just like a voltage difference Loop integral of E-field is the “emf”: ...
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... around 120W. I also have incorporated a lock which requires a specific key to be opened, for safety purposes and to more easily be able to control when the capacitors are allowed to be charging. One of the most striking features is the large schottky diode mounted on the side of the Coilgun, whose f ...
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... #21 Figure 30-50 shows two parallel loops of wire having a common axis. The smaller loop (radius r) is above the larger loop (radius R) by a distance x >> R. Consequently, the magnetic field due to the current i in the larger loop is nearly constant throughout the smaller loop. Suppose that x is in ...
Sources of the Magnetic Field
Sources of the Magnetic Field

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Magnetic core

A magnetic core is a piece of magnetic material with a high permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies. It is made of ferromagnetic metal such as iron, or ferrimagnetic compounds such as ferrites. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material. The magnetic field is often created by a coil of wire around the core that carries a current. The presence of the core can increase the magnetic field of a coil by a factor of several thousand over what it would be without the core.The use of a magnetic core can enormously concentrate the strength and increase the effect of magnetic fields produced by electric currents and permanent magnets. The properties of a device will depend crucially on the following factors: the geometry of the magnetic core. the amount of air gap in the magnetic circuit. the properties of the core material (especially permeability and hysteresis). the operating temperature of the core. whether the core is laminated to reduce eddy currents.In many applications it is undesirable for the core to retain magnetization when the applied field is removed. This property, called hysteresis can cause energy losses in applications such as transformers. Therefore, 'soft' magnetic materials with low hysteresis, such as silicon steel, rather than the 'hard' magnetic materials used for permanent magnets, are usually used in cores.
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