12 results about "Ionization current" patented technology

The invention particularly relates to a preionization gap design method of a gas switch, which can remarkably improve the discharge performance of a main gap of the switch and solve the problem that the existing preionization gap breakdown voltage and preionization loop energy storage capacitor capacitance value design method is difficult to reduce preionization gap main gap breakdown jitter to the greatest extent. And meanwhile, the number of main gap discharge channels of the switch is increased. According to the pre-ionization gap design method of the gas switch, three parameters which influence the breakdown performance of the pre-ionization gap, namely the pre-ionization current amplitude, the pre-ionization current pulse width and the reduced electric field at the generation moment of the pre-ionization current, and the thresholds of the parameters are fully considered, so that the influence factors considered by the design method are more comprehensive.

The invention discloses a tritium monitor for realizing alpha, beta and gamma background deduction and a tritium activity concentration detection method.The tritium monitor comprises a detector I, a detector II and a signal processing unit, and the detector I is used for detecting alpha particles, beta particles and gamma particles; wherein the beta particles comprise tritium decay beta particles and high-energy beta particles with energy higher than that of the tritium decay beta particles, and the detector II is used for detecting alpha particles, gamma particles and high-energy beta particles and outputting signals II corresponding to counting rates of the particles. The signal processing unit is electrically connected with the detector I and the detector II, and the signal processing unit is configured to be used for receiving the signal I and the signal II, calculating a background equivalent current jointly generated by the alpha particles, the gamma particles and the high-energy beta particles based on the signal II and a preset calibration coefficient, and calculating the total ionization current based on the difference value of the total ionization current and the background equivalent current. And obtaining a net tritium current, and determining the tritium activity concentration based on the net tritium current.

The invention relates to the technical field of nuclear radiation monitoring, in particular to an automatic gaseous tritium sampling and measuring method which comprises the following steps: a feature space mapping step: acquiring ionization current and environmental data, and extracting multi-dimensional signal features; a memory entropy observation step: inputting the features into a dynamic memory entropy observer model, and resolving a current memory entropy value representing the nuclide adsorption degree; an intelligent decision-making step: generating an optimal sampling control strategy by using a reinforcement learning decision-making model based on the memory entropy; a dynamic regulation and control and output step: controlling the valve to be switched between a continuous sampling mode and a pulse cleaning mode in response to the strategy, and outputting a measurement result; by introducing the memory entropy state variable, the sensor is converted into an active gamer, and the effective service life of the sensor is prolonged to the maximum extent.

The invention provides an X-ray monitoring method and device. The method comprises the steps that a supervision ionization chamber and a reference ionization chamber are arranged at an outlet of an X-ray machine; driving the X-ray machine to emit X-rays, and acquiring a first ionization current generated by the transmission ionization chamber when the X-rays are transmitted to the transmission ionization chamber; acquiring a second ionization current generated by the supervision ionization chamber when the reference ionization chamber and the supervision ionization chamber are synchronously measured, and acquiring a third ionization current generated by the reference ionization chamber when the reference ionization chamber and the supervision ionization chamber are synchronously measured; determining a scale factor of the transfer ionization chamber relative to the reference ionization chamber according to the first ionization current, the second ionization current, the third ionization current and the effective collection volume of the reference ionization chamber; acquiring a plurality of corrected ionization currents of the supervised ionization chamber after temperature and air pressure correction, and determining relative standard uncertainty; and determining the standard uncertainty according to the transmission ionization chamber relative to the reference ionization chamber and the relative standard uncertainty. By adopting the scheme, errors caused by the X-ray machine can be dynamically compensated.

A flame detection device that uses a breakdown voltage across a pair of electrodes located in a flame region to detect the presence or absence of a flame. The flame detection device can be used with a burner that is part of a furnace in a home or building's central heating system. Unlike conventional flame detection devices that measure an ionization current in a flame, the flame detection device detects a flame by determining a voltage (also referred to as a breakdown voltage) required for a spark event across a spark gap located in a flame region, and evaluating the breakdown voltage and / or various characteristics thereof to detect the presence or absence of a flame. According to one example, the flame detection device includes a power source, an ignition unit, an output line, an insulator, and electrodes.

This invention relates to the field of nuclear radiation monitoring technology, specifically to an automated gaseous tritium sampling and measurement method, comprising: a feature space mapping step: acquiring ionization current and environmental data, and extracting multidimensional signal features; a memory entropy observation step: inputting the features into a dynamic memory entropy observer model, and calculating the current memory entropy value characterizing the degree of nuclide adsorption; an intelligent decision-making step: generating an optimal sampling control strategy based on the memory entropy value using a reinforcement learning decision model; and a dynamic control and output step: switching the valve between continuous sampling and pulse cleaning modes in response to the strategy, and outputting the measurement results. This invention, by introducing a memory entropy state variable, transforms the sensor into an active player, maximizing the effective service life of the sensor.

A control device (1) for controlling the operating efficiency of an irradiation beam emitting device (2) wherein the irradiation beam emitting device (2) comprises: a vacuum chamber (13), a filament (4) configured to emit electrons by a hot electron effect upon heating, a first electrical conductor (6) and a second electrical conductor (5), the invention relates to a control device (1) for a lamp filament (4), a first conductor (6) and a second conductor (5), each arranged inside a vacuum chamber (13), the control device (1) comprising: a power source (9) connectable to the lamp filament (4), the first conductor (6) and the second conductor (5) to supply power to the lamp filament (4), the first conductor (6) and the second conductor (5); a sensing unit (11) comprising at least one first sensor (7) configured to detect at least one electrical parameter relating to a current flowing through the first electrical conductor (6), the current being defined as an ionization current (IC); and a second sensor (8) configured to detect at least one electrical parameter related to a current flowing through the second electrical conductor (5), the current being defined as an emission current (EC); a control unit (10) coupled to the sensing unit (11) to receive the detected electrical parameter and to the power supply (9) and further configured for performing a main control mode (F1) of the state of the irradiation beam emitting device (2), the mode comprising: regulating the power supply (9) to apply a predetermined current to the filament (4) to emit electrons; adjusting the power supply (9) to apply a predetermined voltage to the first electrical conductor (6); adjusting the power supply (9) to apply a predetermined voltage to the second electrical conductor (5); depending on the detected electrical parameter dependent on the ionization current (IC) and on the detected electrical parameter dependent on the emission current (EC), at least one state parameter representing the operating efficiency of the irradiation beam emission device (2) is derived.

The invention discloses a method for machining a ceramic material through a numerical control machine tool of a machining center, and relates to the technical field of precision machining.According to the method, the machining process is divided into multiple process categories according to the theoretical material removal rate, and when the numerical control machine tool conducts material removal machining on the ceramic workpiece, ion flow is applied between a tool and the ceramic workpiece; and according to the design that the corresponding ionization current values and the coverage forms are distributed according to the process types, and the ionization current values corresponding to the process types are updated to enable the predicted frequency offset to approach to zero, the peak voltage on the surface of the ceramic workpiece generated by processing of the process types is suppressed. Immediate damage to the ceramic workpiece caused by electrostatic stress in the machining process is effectively relieved, potential performance decay and delayed cracking of the ceramic workpiece caused by electrostatic accumulation in the machining process are inhibited, and the stability and safety of the generated ceramic workpiece are improved.

A method for substrate processing includes performing a local substrate process with a processing beam or flux on a substrate disposed in a process chamber. The processing beam or flux is ionized with an ionization current. An output current of the processing beam or flux is measured while performing the local substrate process. The ionization current for the local substrate process is controlled by keeping a product of the measured output current with the ionization current within a tolerance of a set point for the product of the measured output current with the ionization current.

The invention relates to a calibration method and device for an ionization chamber type beta applicator monitor. A balance cover is arranged on an ionization chamber main body in the beta applicator monitor; during calibration of a 90Sr-90Y beta standard radiation field, the ionization chamber main body is not provided with the balance cover; when a 60Co gamma standard radiation field is calibrated, a balance cover is mounted on the ionization chamber main body, a beam axis of a ray is aligned with the center of the ionization chamber main body, and the thickness of the balance cover is not smaller than the maximum penetration distance of the ray in a material corresponding to the balance cover; alternately applying positive and negative polarity high voltage to the ionization chamber main body, ionizing working gas in the ionization chamber main body by rays to generate ionization current, and measuring the ionization current through an electrometer; based on the ionization current, a calibration factor is obtained. According to the ionization chamber, the technical effect that the ionization chamber main body accurately monitors the high-dose-rate beta rays emitted by the beta applicator is achieved.

A method for substrate processing includes performing a local substrate process with a processing beam or flux on a substrate disposed in a process chamber. The processing beam or flux is ionized with an ionization current. An output current of the processing beam or flux is measured while performing the local substrate process. The ionization current for the local substrate process is controlled by keeping a product of the measured output current with the ionization current within a tolerance of a set point for the product of the measured output current with the ionization current.

The present disclosure provides for a fastener driving tool, comprising: a combustion chamber having a first inlet port for inputting a first fluid having at least one variable fluid characteristic, and a second inlet port for inputting a second fluid; a piston configured to drive a fastener into a work surface; an ignition device configured to generate an electric arc within the combustion chamber to ignite within the combustion chamber a mixture of said first fluid and said second fluid, and a mechanism configured to measure an ionization current within the combustion chamber.