Pulse coil


(57) Abstract:

Usage: in the field of a strong pulsed magnetic systems used in solid-state physics and high energy. The technical result consists in increasing the service life due to coil manufacture of fusible metal. The coil contains a metal cylinder from legkoplavkoe material, which are in the form of a non-magnetic plastic material, located in the vessel. The operation of the device is as follows. Through the nozzle in the vessel is let up the refrigerant. Under the action of low temperature liquid metal cylinder hardens according to the shape thus obtained cylinder. With the help of busbars from the pulse generator through the flanges in the cylinder moves the pulse current, which creates the necessary magnetic field. If after a current pulse in the cylinder formed cracks, refrigerant through the outlet fitting is discharged from the vessel. As a result, the metal cylinder passes into the liquid state. Next is the intake refrigerant in the vessel, the metal hardens and the cylinder is ready for the next current pulse. 1 Il.

The invention relates to Electrophysics, and more specifically to the field of a strong pulse is mpulse coil (F. Gerlach. Strong and ultrastrong magnetic fields and their applications. - M.: Mir, 1988. - S. 330-331), which constitute the coil wound rectangular wire, impregnated with epoxy resin. Outside the coil is placed a cylinder of steel or fiberglass. The main disadvantage of these coils is a significant amount of self-inductance of the coil, which limits the initial rate of rise of the magnetic field and increases the rise time of the current pulse in the coil. At high supply voltages (for example, in installations for the study of high-temperature plasma voltage reaches 100-150 kV) complications associated with providing turn-to-turn insulation.

Noted deficiencies deprived pulse coil (C. C. Khmelkov. The technique of large pulse currents and magnetic fields. - M.: Atomizdat, 1970. - S. 440-441), made as a single-turn solenoid, selected as a prototype.

The coil is made from a single piece of metal (for example, of mild steel, copper or beryllium bronze), making it possible to avoid weakening in the place of the supply current. Structurally, the coil is thick-walled cylinder with slit on the side surface. Jn. Outside the cylinder pulled the bandage from the Delta wood.

The main disadvantage of the prototype is a small life, for example, increasing the amplitude of induction obtained magnetic fields up to 28 T destruction coil of low-carbon steel (wall thickness 5 mm) is already on the second pulse.

The author was faced with the task of creating a pulse the coil with a longer lifespan.

This task is achieved by the fact that in a pulsed coil comprising a metal cylinder with a slit on the side surface, the edges of which (on crack) end flanges for busbars, metal cylinder made of low-melting metal (such as mercury or gallium) and is equipped with a form of non-magnetic plastic material (such as PTFE), located in the vessel, which has fittings for inlet and outlet of coolant (e.g. liquid nitrogen).

Comparative analysis with the prototype shows that the pulse coil features: 1) performing a metal cylinder of a low-melting metal; 2) the use of forms of non-magnetic plastic material; 3) the presence of a vessel with fittings for inlet and outlet of the refrigerant.

Marked otlichit coil, by fusion of the metal of the cylinder, with subsequent freezing.

Thus, the proposed device meets the criterion of "novelty". Noted the novelty of the claimed device was investigated for its essential features on the criterion of "inventive step", if this were taken into account sources of information in this and related areas of technology, as well as the conditions that all the essential features of the invention reside in a single logical relationship and sent together to achieve a common result.

So, in source (Patent N 2082654, IPC 6 In 64 G 1/64. Docking device spacecraft / Gamayunov A. C. , Kim, K. K., A. Nefedov Century (Russia). - Publ. 27.06.97. Bull. N 18) is used fusible metal, which is in run-off glass of one of the spacecraft, for rigid fixation arrow-shaped pin of another dockable device. It is obvious that this device in their design, functionality and results are not equivalent to the claimed device. This allows us to conclude that the proposed pulse coil is new and meets the criterion of "inventive step".

PR is metal (for example, of mercury or gallium), has a slit 2 on the side. The rim 1 (slit) end flanges 3, which are current-carrying bus 4. Arrows labeled I shows the direction of the current. The cylinder 1 is in the form of 5, which is made of non-magnetic plastic material (such as PTFE), and is a vessel for molten metal. Form 5 with the cylinder 1 is placed in the vessel 6, which is made of a nonmagnetic material (e.g. glass) and is supplied with fittings for inlet 7 and release 8 of the refrigerant, such as liquid nitrogen, argon or carbon dioxide. The vessel 6 can be performed with a closed cavity, then it is supplied release valve (not shown) or with an open cavity.

The operation of the device is as follows. In the flanges 3 are lowered the feed bars 4 (the metal, in the form of 5, is in the liquid state). Through the nozzle 7 into the vessel 6 is let up, the refrigerant (if it is liquid nitrogen, the temperature of minus 195,8oC, if the argon - minus 185,7oC, if the carbon dioxide - minus 78,55oC). Under the action of low temperature liquid metal solidifies in the form of 5, thus obtained cylinder 1 (the melting point of mercury -38,84o<3 in the cylinder 1 starts the pulse current (I), which creates the necessary magnetic field. If after a current pulse in the cylinder 1 formed cracks (in case the vessel 6 of glass damage to the cylinder detected visually; if the vessel is made of opaque material, the discovery of the destruction of the cylinder 1 is determined by means of magnetic flaw detection), the refrigerant through the outlet fitting 8 is discharged from the vessel 6 (either in the environment or in the system storage and liquefaction of the refrigerant), resulting in a metal cylinder 1 passes into a liquid state. Next is the intake refrigerant in the vessel 6, the metal hardens and the cylinder 1 is ready for the next current pulse.

As you can see, compared with the prototype in the inventive device due to the use of fusible metal, you receive the ability to quickly restore the destroyed coil and its repeated use, which significantly increases the service life of the latter.

Pulse coil comprising a metal cylinder with a slit on the side surface, the edges of which are for slit end flanges for busbars, wherein the metal cylinder is made of fusible metal and is in the form of nemanic the


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