Abstract:
PROBLEM TO BE SOLVED: To provide an in-liquid plasma generation method and an apparatus for generating plasma in a bubble formed in a liquid and permeating and diffusing active ion species into the liquid. SOLUTION: In the in-liquid plasma generation method and the in-liquid plasma generation apparatus 2, a pair of electrodes at least one of which consists of a high voltage electrode 6 having a high voltage insulating part 6b and at least one projection part is immersed in liquid 14, a high voltage pulse is applied at a high repetition rate between these electrodes to Joule-heat the liquid adjacent to the high voltage electrode 6 and continuously or intermittently to boil and evaporate the liquid, the evaporation bubbles form an evaporation bubble region 28 surrounding at least a projection part tip 6c of the high voltage electrode 6, evaporation objects in the bubbles is ionized (turned to plasma) by high voltage dielectric breakdown discharge in the evaporation bubbles by the high voltage pulse 26 to form various kinds of ions, and the ion species in the plasma is permeated and diffused into the liquid 14. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a rotation system capable of efficiently rotating a rotating shaft utilizing the weight of a load (heavy object) while suppressing a resistance due to the weight of the load provided to the rotating shaft.SOLUTION: Bearings are inserted into both ends of the rotating shaft, respectively, and the outer peripheral rings of the bearings are fixed to the rotating shaft. A fixed shaft fixed to the inner peripheral ring of each bearing projects from the inner peripheral ring of the bearing, and the fixed shaft is fixed to a base. The inner peripheral ring of the bearing is positioned on the fixed side, and the outer peripheral ring of the bearing is positioned on the rotation side where the rotating shaft is rotated.
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply apparatus capable of continuously applying a repetitive high-power and high-voltage pulse with higher frequency to use continuous plasma in liquid to allow efficiency of a chemical reaction to be improved.SOLUTION: A power supply apparatus continuously applies a repetitive high-power and high-voltage pulse with higher frequency to electrodes disposed in a solution to generate plasma in the vicinity of the electrodes to thereby improve efficiency of a chemical reaction of the plasma at a gas-liquid interface in the solution. In the apparatus, a divided frequency and phase control circuit 3 of an IGBT driver 18 generates first, second and third switching signals with a phase shifted by a 1/3 period, and outputs the first, second and third switching signals to first, second and third switching circuits 11, 12, and 13 of first, second and third modulator power supplies 4, 5, and 6, respectively, to allow the respective switching circuits to perform a switching operation and to generate power-amplified first, second and third pulse voltages. A pulse voltage formed by combining the first, second and third pulse voltages is inputted to a pulse transformer 15.
Abstract:
A power supply circuit for plasma generation by which a large quantity of generated plasma can be smoothly obtained without increasing the sizes of an apparatus, a plasma generating apparatus, a plasma processing apparatus which can process a large quantity of objects to be processed at a low cost by using the plasma generating apparatus, and plasma processed objects having target quantities are realized. An electric discharge generating electrode is composed of two or more first electrodes and one or more second electrodes. An LC series circuit is provided by connecting a capacitor C and a coil L in series between one of outputs of an alternating high voltage generating circuit which generates an alternating high voltage to be applied between the electrodes of electric discharge generating electrode, and the first electrode. When electricity is discharged in one of the electrode pair, voltage drop is suppressed by the coil even when the electric discharge of capacitor progresses, and since electric discharge from the other electrode pair is induced without being disturbed, a large quantity of plasma can be smoothly generated by common use of the alternating high voltage generating circuit.
Abstract:
PROBLEM TO BE SOLVED: To provide an in-liquid plasma generation method and an apparatus for generating plasma in a bubble formed in a liquid and permeating and diffusing active ion species into the liquid. SOLUTION: In the in-liquid plasma generation method and the in-liquid plasma generation apparatus 2, a pair of electrodes at least one of which consists of a high voltage electrode 6 having a high voltage insulating part 6b and at least one projection part is immersed in liquid 14, a high voltage pulse is applied at a high repetition rate between these electrodes to Joule-heat the liquid adjacent to the high voltage electrode 6 and continuously or intermittently to boil and evaporate the liquid, the evaporation bubbles form an evaporation bubble region 28 surrounding at least a projection part tip 6c of the high voltage electrode 6, evaporation objects in the bubbles is ionized (turned to plasma) by high voltage dielectric breakdown discharge in the evaporation bubbles by the high voltage pulse 26 to form various kinds of ions, and the ion species in the plasma is permeated and diffused into the liquid 14. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic wave generator capable of generating a voltage pulse at a high voltage required to activate a virtual cathode electron tube at high rising speed by using a plasma switch. SOLUTION: An MC type explosive electric generator 20 amplifies a current to be supplied from a capacitor group 2, a first air-core transformer 30 stores the amplified current as electric energy, which passes through the plasma switch 40 to obtain a high voltage pulse, and a second air-core transformer 50 amplifies the high voltage pulse at a prescribed number of multiples. When the voltage of the high voltage pulse reaches a prescribed value, a gap switch 60 is operated, and a high speed rising pulse voltage waveform is applied to the virtual cathode electron tube 70. The virtual cathode electron tube 70 generates an electromagnetic wave of high output, which is emitted from an antenna 80. COPYRIGHT: (C)2007,JPO&INPIT