34results about How to "High magnetic field" patented technology

An electrodeless fluorescent lamp and fixture which operates at the frequency range of 50-1000 KHz and power from 20 to 200 W is disclosed. The lamp includes a bulbous envelope (1) filled with rare gas and metal vapor and a reentrant cavity (5). The inner walls of the envelope are coated with phosphor (2) and a protective coating (3). An induction coil (9), made from multiple strands of wire having very low resistance at frequencies below 1000 KHz, together with a ferrite core (10), having high permeability and low power losses, generates an inductively-coupled plasma in the envelope volume. The plasma generates visible and UV radiation that is converted into visible light by the phosphor coated on the envelope walls. A metallic cylinder (13), placed inside the ferrite core (10), removes the heat generated by the plasma from the coil and ferrite core and redirects the heat to the lamp base and thence to the lamp fixture. The power efficiency of the lamp operated at frequencies 200-300 KHz and its efficacy are the same as those in electrodeless RF lamps operated at frequencies of 2.65 MHz and at 13.56 MHz.

An electrical motor system comprises a switched reluctance electrical motor comprising a rotor section and a stator section, the rotor section comprising a plurality of rotor teeth and the stator section comprising a plurality of stator teeth, the stator teeth wound with respective coils. Coil driver circuitry is coupled to the coils of the stator teeth and controls an independent phase of electrical power to each coil of the plurality of stator teeth. The coils of the stator teeth each have an inductance which absorbs electrical energy provided to that coil by the coil driver circuitry and subsequently releases at least a portion of the electrical energy back to the coil driver circuitry when that coil is not being actively driven by the coil driver circuitry. The coil driver circuitry comprises an electrical energy store configured to store the portion of the electrical energy released back from the inductance of each coil and the electrical energy provided to each coil of the stator teeth by the coil driver circuitry is augmented by the electrical energy stored in the electrical energy store.

An FePt magnetic thin film, characterized in that it has an atomic composition represented by the following formula: FexPt100-x wherein 19<x<52; and a method for manufacturing the FePt magnetic thin film. The FePt magnetic thin film is novel, can be formed at a lowered temperature, and further, has perpendicular magnetic anisotropy.

Magnetic recording is performed by a magnetic field lower than a coercive force without considerably changing the structure of a magnetic head and the vicinity thereof. When recording is performed by applying a magnetic field to a magnetic recording layer of a recording medium using a magnetic head, the electric field is generated in the magnetic recording layer so that the coercive force thereof is decreased. Accordingly, magnetization is recorded by a lower magnetic field than an intrinsic coercive force of the magnetic recording layer. In order to generate the electric field, a power source is connected to magnetic pole layers of a longitudinal magnetic recording head (or to a magnet pole layer of a perpendicular magnetic recording head and a conductive layer of a recording medium thereof).

The invention provides a magnetic head for perpendicular recording capable of recording with high linear recording density and high track density, and a magnetic disk drive incorporating the same. In order to achieve this, one or more sides of the main pole of the magnetic head for perpendicular recording except for the trailing side are formed in a taper with an appropriate angle against the tip surface of the main pole, and the yoke whose widest principal plane is in parallel to the tip surface is provided on the bottom of the main pole.Thereby, the invention achieves the magnetic head for perpendicular recording that generates a sufficiently high magnetic field, and assumes a sharp gradient of magnetic field on the trailing side. By incorporating this magnetic head, a magnetic disk drive capable of handling high linear recording density can be produced.

A superconducting magnet system for nuclear magnetic resonance with a high magnetic field and a high degree of homogeneity of magnetic field is provided. The system comprises a main coil and a magnetic field homogeneity compensating coil having a combination of a forward current and a reverse current, and is composed of 24 superconducting coils formed by winding NbTi / Cu low-temperature superconducting wires. The system can produce a magnetic field of 9.4 T within a room-temperature space of 800 mm and can obtain a degree of non-homogeneity of magnetic field less than 0.1 ppm within a spherical volume of 300 mm. The system is equipped with a superconducting magnet inside, and a low-temperature vessel for liquid helium provides a low-temperature environment of 4K which is required for the normal operation of the superconducting magnet. A ferro-magnetic shielding system enables the system to have a good electromagnetic compatibility.

An internal diffusion process Nb3Sn superconducting wire is produced by drawing a composite wire including a composite material containing a plurality of Nb or Nb based alloy cores embedded in a Cu or Cu based alloy matrix and a Sn or Sn based alloy core disposed in the center portion, a diffusion barrier layer composed of Nb or Ta and disposed on the outer perimeter of the composite material, and stabilizing Cu disposed on the outside of the diffusion barrier layer and heat-treating the resulting composite wire so as to diffuse Sn and react Sn with the Nb or Nb based alloy cores, wherein the area percentage of the stabilizing Cu in a cross section in a direction perpendicular to the axis center of the composite wire is 10% to 35% and the area percentage of the diffusion barrier layer is 10% to 25%.

The invention relates to a proportional magnet, including a winding carried by a coil body, two pole shoes which project into the coil body from opposite sides and which are spaced apart axially from one another, and a gap provided between the pole shoes. The invention further includes a magnet armature, which is arranged within the winding in an axially displaceable manner substantially parallel to the longitudinal axis thereof. The axial movement of the magnet armature can be transmitted to a valve member. The invention still further includes an electrically conductive element, wherein the magnet armature can be moved through the element, wherein the element is formed from a basic body having an electrically conductive layer, and wherein the electrically conductive layer is applied separately to the basic body.

A master carrier for magnetic transfer includes a transfer portion on which a magnetic layer corresponding to magnetic information for transfer is formed, and a non-transfer portion forming a concave shape relatively low with respect to the transfer portion having the magnetic layer, wherein the magnetic layer of the transfer portion has perpendicular magnetic anisotropy, with residual magnetization Mr of 500 emu / cc or less, and saturation magnetization Ms of 900 emu / cc or more. CoPt can be used as a material of the magnetic layer, and use of Co4Pt1 (at %) is especially preferable. Thereby, a master carrier for magnetic transfer which can generate a high magnetic field capable of transfer of a short bit to a high density medium is provided.

A type of High Magnetic Field Assisted PLD System consisting of pulsed laser and PLD cylindrical vacuum chamber inclusive of double-layer clip-sheath cylindrical chamber with water cooling located in the bore hole of superconducting magnet is disclosed. A flange plate in one side of the double-layer clip sheath is equipped with substrate heating table or laser heating table and rotating mechanism; the flange plate in another side is equipped with target components and moving / rotating mechanism. Either the substrate heating table or laser heating table is located in the center area of magnetic field of the superconducting magnet. A PLD (pulsed laser deposition) cylindrical vacuum chamber is located in the slide rail. A sealed laser leading-in chamber and a vacuum-sealed video-unit leading-in chamber is installed on the flange plate in one side of double-layer clip sheath cylindrical chamber.

A low-cost superconducting coil which can generate a high magnetic field at comparatively high temperature is provided. The superconducting coil is formed in a pancake shape by winding a superconducting conductor that is made by electrically connecting a tape-shaped (Bi,Pb)2223 superconducting wire and a tape-shaped RE123 superconducting wire in series such that the tape-shaped (Bi,Pb)2223 superconducting wire is arranged in the outer circumferential part and the tape-shaped RE123 superconducting wire is arranged in the internal circumferential part.

An electrical motor system comprises a switched reluctance electrical motor comprising a rotor section and a stator section, the rotor section comprising a plurality of rotor teeth and the stator section comprising a plurality of stator teeth, the stator teeth wound with respective coils. Coil driver circuitry is coupled to the coils of the stator teeth and controls an independent phase of electrical power to each coil of the plurality of stator teeth. The coils of the stator teeth each have an inductance which absorbs electrical energy provided to that coil by the coil driver circuitry and subsequently releases at least a portion of the electrical energy back to the coil driver circuitry when that coil is not being actively driven by the coil driver circuitry. The coil driver circuitry comprises an electrical energy store configured to store the portion of the electrical energy released back from the inductance of each coil and the electrical energy provided to each coil of the stator teeth by the coil driver circuitry is augmented by the electrical energy stored in the electrical energy store.

An arc chute arrangement for arc quenching in electrical switching device, said arrangement comprising a plurality of deion plates, each said deion plates further comprising a pair of plates having an ablative material sandwiched therebetween; a lining means for holding said deion plates; wherein said deion plates having a chamfered profile at one corner to generate high magnetic field that drive the arc inside arc chute and said chamfered profile arranged alternatively thereby substantially lengthening the arc.

The invention discloses a magnetic system structure for a cylindrical permanent magnetic separator, which is an arc-shaped magnet combined by a plurality of primary magnetic blocks, a plurality of secondary magnetic blocks, and an plurality of auxiliary magnetic block which are in homopolar arrangement, wherein the primary magnetic blocks and the secondary magnetic blocks are arranged alternately along the axial direction of the arc-shaped magnet, the polarities of magnetic poles alternate along the axial direction of the arc-shaped magnet, the primary magnetic blocks and the auxiliary magnetic blocks are arranged alternately along the circumferential direction of the arc-shaped magnet, the polarities of magnetic poles alternate along the circumferential direction of the arc-shaped magnet, all the magnetic blocks are paired in a closely magnetic gathering way, magnetic conductive matters are stuffed among the magnetic blocks, and the primary magnetic blocks, the secondary magnetic blocks and auxiliary magnetic blocks all together form the high-field strength magnetic system structure which has a magnetic loop and, moreover, the polarities of the magnetic poles of the formed magnetic system structure alternate along circumferential and axial directions. The magnetic system structure has high magnetic field strength which is not less than 1.4T on a wider magnetic pole face (8mm); in addition, the magnetic system structure has wide strong magnetic action face, large gradient, good absorption to large granular minerals and very obvious separation effect on minerals with weak and medium magnetism.

The invention discloses a cutting type auxiliary dredging device for a drainage pipe, and relates to the technical field of drainage pipelines. The cutting type auxiliary dredging device for the drainage pipe comprises an outer shell and an inner pipe coaxially and fixedly connected in the outer shell, wherein the two ends of the inner pipe are both in sealed communication with the drainage pipe, and a cleaning ring is coaxially and rotatably connected in the inner pipe and is in sliding connection in the axial direction; a plurality of cutting knives are connected to the inner circumferential side of the cleaning ring in the radial direction, a control ring is connected to the outer circumferential side of the inner pipe in a threaded mode, and a plurality of magnetic blocks are embedded in the control ring. According to the cutting type auxiliary dredging device for the drainage pipe, flowing sewage forms an impact effect on the cleaning ring and the cutting knives in the inner pipe in the normal drainage process, the cleaning ring moves along the pipe wall of the inner wall, and the control ring in threaded connection with the outer peripheral side of the inner pipe is subjected to counter-acting force of magnetic attraction to the cleaning ring and spirally rotates along the outer peripheral side of the inner pipe when the cleaning ring moves, so that the cleaning ring is magnetically driven to rotate in reverse, the cutting knives of the cleaning ring forms a spiral cutting effect on waste, and the crushing effect on the waste is improved.

The invention discloses a testing device and a testing method for restoring the contaminated soil based on magnetism-electricity combination. A restoring device comprises a magnetic field generating area, an anode chamber, a cathode chamber and a soil chamber; the magnetic field generating area is located around in the device, the interior of the magnetic field generating area is a whole box whichis separated into three rectangular boxes by a perforated plate, the middle is the soil chamber, and the two sides are the anode chamber and the cathode chamber. The testing method of a testing device includes the steps of the design of the device, the configuration of the contaminated soil, the restoring testing, the regulation of a single factor, and the repeating of the restoring test. The testing device is low in size, easy to transport and high in space utilization degree, can simulate various working conditions and improve the testing efficiency.

A superconducting magnet system for nuclear magnetic resonance with a high magnetic field and a high degree of homogeneity of magnetic field is provided. The system comprises a main coil and a magnetic field homogeneity compensating coil having a combination of a forward current and a reverse current, and is composed of 24 superconducting coils formed by winding NbTi / Cu low-temperature superconducting wires. The system can produce a magnetic field of 9.4 T within a room-temperature space of 800 mm and can obtain a degree of non-homogeneity of magnetic field less than 0.1 ppm within a spherical volume of 300 mm. The system is equipped with a superconducting magnet inside, and a low-temperature vessel for liquid helium provides a low-temperature environment of 4K which is required for the normal operation of the superconducting magnet. A ferro-magnetic shielding system enables the system to have a good electromagnetic compatibility.

The invention discloses a metal recovery sorting machine which comprises a magnetic sorting device and a color sorting device. The magnetic sorting device comprises a magnetic assembly arranged at the tail end of a conveying belt, and magnetic attraction metal is attracted by the magnetic assembly to break away from a movement track of mixed materials. The magnetic assembly comprises a driven roller arranged at the tail end of the conveying belt and a plurality of magnets installed on the driven roller; the magnets rotate along with the driven roller and attract magnetic attraction metal on the conveying belt passing through the driven roller, and the magnetic attraction metal moves along with the conveying belt under attraction of the magnets to be sorted; and the residual mixed materials are horizontally thrown by the conveying belt from the tail end of the conveying belt to enter the color sorting device. According to the metal recovery sorting machine, magnetic separation and intelligent color sorting are combined, a magnetic separation equipment structure and a color sorting equipment structure are integrated, and non-ferrous metal, magnetic attraction metal and other metal in a waste metal mixture can be rapidly separated at a time, so that rapid separation and classified recovery of the mixed metal are achieved.

The invention relates to a swinging magnetic field generating device and a control method thereof. The device comprises a direct-current power supply U with adjustable output voltage, a capacitor C, aresistor R1, four diodes D1 to D4, five switches S1 to S5, three silicon controlled rectifiers Q1 to Q3 and three groups of coils L1 to L3, and the three groups of coils share one high-voltage direct-current power supply and one high-voltage capacitor. After the capacitor C is charged by the direct-current power supply U each time, the current sequentially passes through the coils L1, L2 and L3 under the action of the microcontroller to generate a swinging magnetic field, so that the swinging magnetic field is output on the three groups of orthogonal coil shafts. The high-voltage capacitor discharges in the three-axis coils in sequence through one-time charging, a high-intensity magnetic field can be generated, energy is saved, and the frequency of the swinging magnetic field is remarkably improved.

Disclosed herein is a method of forming a metal wiring of a semiconductor device. A method of forming a metal wiring of a semiconductor device comprises the steps of sequentially forming a first anti-diffusion film, a second interlayer insulating film, a third interlayer insulating film and a capping film on a first interlayer insulating film in which a first metal wiring is formed, patterning the capping film, the third interlayer insulating film, the second interlayer insulating film and the first anti-diffusion film so that the first metal wiring is exposed, thus forming a via hole, patterning the capping film and the third interlayer insulating film so that a given surface of the second interlayer insulating film is exposed on the result in which the via hole is formed, thus forming a metal wiring trench, forming a second anti-diffusion film in the via hole and the metal wiring trench, and sequentially forming copper seed layers in the via hole and the metal wiring trench in which the second anti-diffusion film is formed, and then forming a copper layer by means of an electroplating process, thus forming a via and a metal wiring.

A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers.

A magnetic resonance coil comprises a first set of coil elements (54, 56, 80) operatively connectable with a transmit channel (66, 74) to couple with a transmit region of sensitivity for a selected load at a magnetic field strength greater than 3 Tesla, and a second set of coil elements (52, 54, 82) operatively connectable with a receive channel (66, 74) to couple with a receive region of sensitivity for the selected load at the magnetic field strength greater than 3 Tesla. The first set of coil elements is arranged proximate to but not surrounding the transmit region of sensitivity, and the second set of coil elements is arranged proximate to but not surrounding the receive region of sensitivity. The first set of coil elements and the second set of coil elements having at least one coil element (52, 56) not in common. The first and second sets of coil elements define transmit and receive regions of sensitivity for the selected load at the magnetic field strength greater than 3 Tesla that are substantially similar.

Porphyrin compounds useful in the field of magnetic resonance imaging (MRI) as contrast agents. The compounds are relatively lipophilic porphyrins, include one or more enzyme-reactive functional groups, and are cell membrane permeable. Relatively lipophilic group(s) can be enzymatically released within a cell to produce a relatively hydrophilic porphyrin compound.

The invention discloses a magnetic system structure for a cylindrical permanent magnetic separator, which is an arc-shaped magnet combined by a plurality of primary magnetic blocks, a plurality of secondary magnetic blocks, and an plurality of auxiliary magnetic block which are in homopolar arrangement, wherein the primary magnetic blocks and the secondary magnetic blocks are arranged alternately along the axial direction of the arc-shaped magnet, the polarities of magnetic poles alternate along the axial direction of the arc-shaped magnet, the primary magnetic blocks and the auxiliary magnetic blocks are arranged alternately along the circumferential direction of the arc-shaped magnet, the polarities of magnetic poles alternate along the circumferential direction of the arc-shaped magnet, all the magnetic blocks are paired in a closely magnetic gathering way, magnetic conductive matters are stuffed among the magnetic blocks, and the primary magnetic blocks, the secondary magnetic blocks and auxiliary magnetic blocks all together form the high-field strength magnetic system structure which has a magnetic loop and, moreover, the polarities of the magnetic poles of the formed magnetic system structure alternate along circumferential and axial directions. The magnetic system structure has high magnetic field strength which is not less than 1.4T on a wider magnetic pole face (8mm); in addition, the magnetic system structure has wide strong magnetic action face, large gradient, good absorption to large granular minerals and very obvious separation effect on minerals with weak and medium magnetism.

The invention discloses a circulating type high-heat-preservation concrete block and a preparation method thereof, belongs to the technical field of concrete blocks, and can realize that a mortar pre-filling groove is formed in a block body and a circulating heat preservation component is embedded and mounted, so that on one hand, the strength of the block body and the connecting strength betweenadjacent block bodies can be improved; and on the other hand, on the inner side and the outer side of the interior of the block body, heat absorbing nets are formed through heat absorbing wires to absorb heat on the block body and then transferred to the inner heat absorbing balls, through sensing and comparison of the inner heat absorbing balls and outer heat dissipating balls to heat, after theinner heat absorbing balls absorb enough heat, due to the fact that the effect of the magnetic field triggered by a high-temperature side is stronger, circulation heat conduction connection is forcibly established, absorbed heat is returned to an original place, heat conduction connection is disconnected in the normal state, the excellent heat preservation performance of the block body is fully guaranteed, and meanwhile high strength and long service life are provided.