(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
FIELD: applied superconductivity.
SUBSTANCE: proposed method that can be used for manufacturing mechanically loaded superconductor windings designed for sustaining conductor stress higher than 100 MPa as well as superconductor windings and devices designed for operation under variable conditions, such as superconducting magnets for charged particle accelerators and superconductor inductive energy storages involves use of liquid epoxy resin as filler doped with finely dispersed powder of rare-earth intermetallide, for instance HoCu2 (holmium-copper) or CeCu2 (cerium-copper). Filler concentration is chosen between 20 and 50% of liquid epoxy resin volume.
EFFECT: enhanced performance characteristics of superconductor windings under variable conditions.
4 cl, 2 dwg
FIELD: high-voltage charged particles accelerators.
SUBSTANCE: device has high-voltage rectifier transformer, including high-voltage transformer, consisting of magnetic duct, rods with primary winding of which are encased in electrostatic screens, sectioned secondary winding, rectifier elements, inserted between sections of secondary winding, accelerator pipe with charged particles source, safety screen, inside safety screen compensation coil is mounted with possible presence of axial component of magnetic field in counter-phase to field vector, moving charged particles beam from accelerator pipe axis. Correction method includes forming by high-voltage rectifier transformer of high-voltage accelerator potential, initiation of charged particles flow in charged particles source, acceleration of charged particles flow in sectioned accelerator pipe, forming of beam of charged particles, while additional magnetic field is formed using compensating coils, mounted on external surface of safety screen.
EFFECT: broader functional capabilities, higher reliability, simplified construction, higher efficiency.
2 cl, 8 dwg
FIELD: applied superconductivity.
SUBSTANCE: proposed composite superconductor that can be used to manufacture superconductors for superconducting windings suffering heavy mechanical loads (at operating pressure across conductor higher than 100 MPa) as well as for superconducting windings and devices operating under variable conditions, such as superconducting inductive energy storage devices, dipole and quadrupole magnets for charged particle accelerators, has superconducting material fibers, matrix of high-conductivity metal, such as copper and rare-earth intermetallide possessing high thermal capacity at low temperatures. Composite superconductor is provided with metal sheath accommodating rare-earth intermetallide; mentioned wires and conductor are welded together. Metal sheath can be made in the form of hollow cylindrical conductor or flat strip with hollow interlayer, their hollow spaces being designed to dispose rare-earth intermetallide. Composite superconductor is made in the form of a few multiple-fiber composite superconducting wires twisted around hollow cylindrical conductor accommodating rare-earth intermetallide. Composite superconductor can be made in the form of flattened single-lay strand of several multiple-fiber composite superconducting wires and several hollow cylindrical conductors of same diameter accommodating intermetallide which alternately vary within strand. Rectangular-section conductor is made of high-conductivity metal and has longitudinal groove.
EFFECT: enlarged functional capabilities.
7 cl, 8 dwg
FIELD: electrical engineering, superconducting electromagnets for their change-over to sustained current operation with the use of detachable current conductor.
SUBSTANCE: the device has a superconducting coil cooled in a vacuum container. The first current conductor is fixed inside the vacuum container. Its one end is connected to the superconducting coil, and the other has a contact section of the wire. The second current conductor passes through a through hole provided in the vacuum container with keeping of leak-proofness. Its one end is connected to the wire line leading to the outer source of exciting current, and its other end has a section of disconnection/connection, it is installed on the contact section of the wire for detachment. The device is made for change over to sustained current operation by means of the current fed from the outer source of exciting current, when the mentioned section of connection/disconnection is in contact with the wire contact section, and can maintain the sustained current operation after its disconnection from the wire contact section.
EFFECT: provided effective, precise and safe connection of the current conductor of the superconducting magnet.
14 cl, 8 dwg
FIELD: electric engineering.
SUBSTANCE: in accordance to method for changing amount of energy in magnetic system, current is measured in at least one pair of windings of magnetic coil, while changed in one coil is electric current of one direction of current density vector, and in another winding electric current of opposite direction of current density vector is measured. Device contains magnetic coil containing at least one magnet with winding. Magnetic system contains at least one more winding, while at least two windings are made with possible connection as one pair of windings and are made with possibility of joint powering by currents of opposite directions, while it is possible to inject energy into at least one pair of windings and to eject energy from at least one pair of windings.
EFFECT: increased efficiency of parameter changes in magnetic system.
2 cl, 14 dwg
SUBSTANCE: thermo stabilised superconductors are implemented in the shape of matrix from metal or alloy, containing fibers of superconducting material and combination of rare-earth metals with extremely high heat capacity at low temperatures. At that superconductor contains at least two metallic tubes of unconditioned cross-section filled by combination of rare-earth metals and distance between tubes is not less then two tube linear dimensions. Superconductor has external envelope made from metal with high conducting properties. Tubes with combination of rare-earth metals can be distributed either by section of conductor as in matrix or by envelope.
EFFECT: extension of superconductor capabilities by means of increasing of its heat-absorbing abilities.
SUBSTANCE: proposed saddle shaped coil winding (3) is made from a flat shape of a race track type coil on a pipe-like lateral surface (Mf) such that, it contains winding sections (3a) axially passing on the lateral side and winding sections (3b, 3c), passing between them on frontal sides, which form end windings. Separate turns (Wi) of the coil winding must be made from at least one tape of a superconductor (5), particularly with superconducting material with high critical temperature Tc, whose narrow side (5a) faces the pipe-like lateral surface (Mf). To prevent inadmissible mechanical loads on the conductor when forming the winding, turns (Wi) in the saddle shape must have perimetre (U) respectively, which remains virtually unchanged compared to that in a flat coil.
EFFECT: efficient use of superconducting material from ready tape-like conductors with compact arrangement of windings; small diametre can be achieved of the area forming the pipe-like lateral surface.
23 cl, 10 dwg
SUBSTANCE: invention relates to electrical engineering, specifically to thermo-stabilised superconductors based on the Nb3Sn compound and methods of making the said superconductors. The thermo-stabilied superconductor based on the Nb3Sn compound is made in form of a matrix from a metal or alloy, containing superconducting material fibre, metal tubes filled with a rare-earth metal compound with extremely high heat capacity at low temperatures, an outer hollow copper cylinder and a thin cylindrical shell made from titanium and/or niobium placed coaxially between the matrix and the outer hollow copper cylinder. The metal tubes are tightly pressed to each other in the gap between the cylinder and the shell in the first version, or in a gap made in the radial direction in the wall of the cylinder in the second version. The method of making such thermo-stabilised superconductors is described.
EFFECT: wider functional capabilities of a thermally insulated superconductor due to presence in the superconductor of a rare-earth intermetallic compound with extremely high heat capacity at helium temperatures, which increases mean heat capacity of the superconductor by 5-6 times.
12 cl, 11 dwg
SUBSTANCE: electrotechnical current limitation device includes primary winding, secondary winding containing suppressed superconductor which is characterised by transition from condition with low resistance to condition with high resistance when electric current exceeds critical value. Secondary winding is connected to primary winding with common part of magnetic flow. In addition, secondary winding includes metal element (6) creating closed circuit, and cryostat (5) providing cooling of secondary winding. Besides it includes at least one element (3) arranged on considerable part of non-suppressed conductor characterised with minimum dependence of its resistance on current and magnetic field, and some part of suppressed superconductor. At least one loop of non-suppressed superconductor (3) and suppressed superconductor (2) are electrically connected in series, thus forming closed circuit.
EFFECT: reducing response time and providing the possibility of controlling it.
17 cl, 8 dwg
SUBSTANCE: device with superconducting coil includes the following: cylindrical container for coil, which has inner circumferential surface and outer circumferential surface. Superconducting coil is stored in cooled container for the coil so that superconducting element is wound on circumferential surface. Columnar magnetic body is attached to inner circumferential surface of container for coil.
EFFECT: sizes are decreased.
4 cl, 11 dwg