Method and apparatus for determining plasma impedance

A plasma processing system, method, and computer readable medium for measuring plasma impedance. The system includes a chamber configured to contain a plasma and including a chuck within an interior area of the chamber, the chuck including a support surface and a bottom surface, and a first voltage-current probe positioned at a first position located exterior to the chamber and on a radio-frequency transmission line between the chamber and a power source. The system also includes a simulation module connected to the first voltage-current probe and arranged to solve, based on measurements transmitted from the first voltage-current probe, a radio-frequency model of the radio-frequency transmission line between the first position and a second position located within the chamber.

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Higher power density downstream plasma

A method and system to obtain a high power density plasma to efficiently generate high concentrations of plasma downstream from one or more plasma sources. A first embodiment of the invention involves a method to provide an improved power density for dissociating one or more gases to create plasma. A second embodiment of the invention involves a method to provide multiple chambers for dissociating one or more gases to create plasma. A third embodiment involves an apparatus using a constriction in a discharge chamber containing one or more gases, to provide an improved power density for dissociating one or more gases to create plasma. A fourth embodiment involves an apparatus using a constriction in multiple discharge chambers containing one or more gases, to provide an improved power density for dissociating one or more gases to create plasma.

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Plasma cutting torch speed modulation

A method and a system for the plasma arc cutting of a workpiece with automatic adaptation of the characteristics of the plasma jet by making various corrections, simultaneously and in real time, to several parameters, including the cut path.

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Workpiece welding process

A laser light L is emitted from a laser light source 6 to workpieces 1, 2, to form a laser molten weld pool 3, and immediately thereafter, an arc molten weld pool 4 is formed using an arc welding machine 7; thereby plates 1, 2 are welded. The arc welding machine 7 is provided with a filler wire to form a bead 5 on the plate 1. With the welding process according to the present invention, workpieces can be efficiently and securely welded regardless of shape and material of the workpieces.

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Detecting element for a welding device

The invention describes a welding apparatus (1), which has a current source (2) for supplying electrical power to at least one electrode at a welding torch (10) and a control system (4) co-operating with the current source (2), linked to an input device (22) for entering settings for different welding parameters, several sensing means being provided for detecting various actual values of a welding process. At least one measuring device or system for sensing mechanical motion, in particular a welding wire displacement and/or a welding torch displacement or similar, is provided, which detects a surface structure of an object.

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Hair brushing appliance

A hair brushing appliance includes a housing, a motor located within the housing, a brush extending from the housing, and a transmission relaying output torque of the motor to the brush. A slippage mechanism associated with the transmission allows the motor to turn, should the brush stop turning such as might occur if the brush snags with long hair in use.

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Fusion joining device for plastic tubes

A fusion joining device for plastic tubes with which a pair of clampers 30 is supported such that it can be pivoted between the closed position where the joint portion T1 is sandwiched from both sides through a pair of members for heat conduction 20 and the open position where the spacing between the pair of members for heat conduction 20 is widened; and a pair of heaters 40 made of a resistance heat generation material in the shape of a sheet is formed such that it is along the pair of members for heat conduction 20, respectively, in order to heat the joint portion T1 through the pair of members for heat conduction 20.

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Heating device for dental material

A heating device into which a compule of dental material can be inserted to elevate the temperature of the dental material to above ambient temperature prior to clinical use having a base for housing a heating element, a temperature control mechanism for controlling the temperature of the heating element, a power connection for electrically connecting the temperature control mechanism to a source of power and a heating receptacle removably mounted on the base. The heating receptacle comprises a heating tray composed of a conductive material and an upstanding section extending from the heating tray and having a heating chamber open to the atmosphere which is adapted to receive one end of a conventional dispenser in which the compule of dental material is stored for raising the temperature of said dental material in said compule to an elevated temperature.

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Heat generator

A heat generator includes a heat generating member including a heat flow output face, a heat flow insulative member attachably surrounding the heat generating member except the heat flow output face for insulating the heat generating member except the heat flow output face, a heat flow compensating member attachably surrounding the heat flow insulative member but exposing the heat flow output face to allow it contacting with a specimen, and a heat flow compensating circuit connected between the heat flow insulative member and the heat flow compensating member. The circuit is capable of controlling heat generated by the heat flow compensating member to cause no heat flow flowing between the heat flow compensating member and the heat flow insulative member whereby the heat energy of the heat flow outputing from the heat flow output face of the heat generating member is equal to the heat energy of heat generated by the heat generating member.

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Gas cylinder warmer with variable wattage self regulating heater

A gas cylinder includes a cylindrically-shaped main wall having a liner, a facing and insulation located between the liner and the facing. First and second electric, self-regulating heating elements are positioned between the liner and the insulation. The liner is provided with first and second pockets and the first and second heating elements are located within the pockets. The first heating element has a higher wattage density than the second heating element and the first heating element is located below the second heating element. A sealed conduit enclosure contains a terminal block connecting a power input cable to the first and second heating elements. A planar top wall is located at the top of the main wall and has an opening for passage of a regulator of the gas cylinder.

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Purged heater-susceptor for an ALD/CVD reactor

A heater assembly for an ALD or CVD reactor provides protection for an electrical conductor associated with a heating element by using a purge gas to isolate the conductor from the corrosive environment of the reactor chamber. The purge gas is introduced into a sleeve surrounding the conductor and from there is allowed to leak into the reactor chamber to be pumped out with the process gasses. This arrangement avoids the need for airtight seals at the junction of the sleeve and the heating element easing manufacturing requirements and potentially reducing component costs.

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Apparatus and method for melting and supplying thermoplastic material to a dispenser

An apparatus including a tank having at least one side wall for receiving solid or semi-solid thermoplastic material and a base member supporting the side wall(s) for heating and melting the thermoplastic material. The base member has a heated upper surface sloped downwardly towards the side wall(s) for directing the flow of melted material, and is configured to provide a collection trough for receiving the melted material. A strainer is positioned above the collection trough to filter the melted material. The strainer is adapted to support the remaining solid or partially solidified thermoplastic material above a portion of the heated upper surface to provide a less restricted flow path for the melted material to the collection trough.

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