摘要:
A gas plasma emission source includes a solid state signal power source coupled to a resonant cavity. In an alternative embodiment of the invention, an atomic emission detector includes a solid state signal power source coupled to a resonant cavity and a spectrographic detector to sense atomic emissions from a gas within the resonant cavity. In yet another embodiment of the invention, a method of sustaining a plasma includes passing a gas through a resonant cavity and exciting the resonant cavity with signal power from a solid state power source to sustain the plasma in the gas. In another embodiment of the invention, a method of using a solid state power source includes passing a gas through a resonant cavity and coupling sufficient signal power from an output of the solid state power source to sustain a plasma in the gas where the sufficient power is less than 300 watts.
摘要:
Aspects of the present invention provide novel methods and devices for sampling gas, exciting the sampled gas to emit radiation and detecting in real time from the emitted radiation a plurality of wave bands of an emission spectrum. Energy used to excite the sampled gas may be adjusted based on the detected wave bands. A process may be controlled in real time based on the detected wave bands. Novel interfaces may be used to display portions of the detected wave bands. A known flow of a reference gas may be included in the flow of sampled gases and an unknown flow of an unknown flow gas determined.
摘要:
The present invention relates to a photometric device for measuring optical parameters. The invention functions in the ultraviolet light range through use of a monochromator and splits the test light in multiple channels by a rotor assembly, including a mirror.
摘要:
The disclosed invention relates to a calibration method, system and apparatus for a multimetals continuous emissions monitor system (hereinafter “multimetals CEMS”). More specifically, this invention relates to a calibration scheme for continuous monitoring of mercury emissions from stationary sources by plasma emission spectrometry. A source of mercury vapor, preferably a mercury permeation tube, entrains mercury vapor into a constant flow of carrier air. The carrier air mixes with a constant flow of diluent air in an aerosol mixer. The mixer is operably coupled to the analyzer. A gaseous mixture having a calibration mercury concentration flows from the mixer into the analyzer at a constant rate. A graph having coordinates of analyzer signal intensity and mercury concentration is used to plot the calibration scheme. A first signal intensity generated by the analyzer in response to the calibration mercury concentration is used for the first plot on the graph. A second signal intensity generated by the analyzer in response to a blank having zero mercury concentration is used as the second plot on the graph. A linear relationship between the analyzer signal intensity and the mercury concentration on the graph is established from the first plot and the second plot. The slope intercept and slope are used to create a mathematical relationship between the analyzer signal intensity and the mercury concentration. This enables the analyzer to be calibrated by inserting a known mercury concentration into the analyzer and adjusting the signal intensity to conform to the signal intensity calculated from the graph or mathematical relationship.
摘要:
A fluorescence-measuring device for scanning a specimen (36, 226) with a selection element (26, 206). Excitation light is coupled to an excitation beam path and guided to the specimen surface. Fluorescent light, which is emitted by the specimen surface, crosses the excitation beam path in a reverse direction and at the same time is decoupled from the excitation beam path. In the beam path, there is a first dispersive element (30, 210) so that the fluorescent light emitted by the specimen surface can strike the selection element spectrally split. The selection element includes a first area (48, 240) and a second area (26, 242) allowing selection between the excitation and fluorescent light. According to a first aspect, a spatial extension of a transmission area (26) is adjustable in order to adjust the transmitted wavelength range of the emission light. According to a second aspect, the selection element (206) makes it possible to operate with a coherent excitation having several laser lines. A two-dimensional confocal measurement arrangement can be accomplished and the emission light separated from the excitation light can be detected with spectral resolution.
摘要:
This invention provides a method for accurately measuring a gap distance between two electrodes. According to the method, a plasma space is formed between the electrodes, across which a DC voltage is coupled. The plasma space has a reactive gas that emits a spectrum of spectral lines. The spectrum is monitored to determine at least one line distance between the spectral lines. Finally, the gap distance can be deduced according to the line distance and a specific rule.
摘要:
A substrate processing apparatus comprises a process chamber capable of processing a first material on the substrate. A radiation source is capable of emitting radiation that is reflected from the substrate during processing. A radiation detector is provided to detect the reflected radiation and generate a signal trace. A controller is adapted to receive the signal trace and evaluate an endpoint of processing the first material from a change in the signal trace that is distinctive of an exposure of a second material having a different reflectivity coefficient than the first material.
摘要:
A method and apparatus are disclosed for measuring trace amounts of constituents in samples by using laser induced breakdown spectroscopy and laser induced fluorescence under ambient conditions. The laser induced fluorescence is performed at a selected wavelength corresponding to an absorption state of a selected trace constituent. The intensity value of the emission decay signal which is generated by the trace constituent is compared to calibrated emission intensity decay values to determine the amount of trace constituent present.
摘要:
An in-torch vaporization sample introduction system for introducing a sample to be analyzed into a spectrometer, comprising sample holder means for carrying the sample to be analyzed, a modified Fassel-type torch having a plasma fed by inert gas through outer and intermediate feed channels in an enlarged gas tube, an inner axial tube having one end open adjacent the plasma and an opposite end open for receiving the sample holder means for feeding the sample to the plasma, the inner axial tube tapering to a reduced diameter adjacent the one end to form a well defined channel for feeding the sample to the plasma means for positioning the sample holder means in the inner axial tube a predetermined distance below the plasma, and means for sealing the opposite end of the inner axial tube and means for vaporizing the sample.
摘要:
A method and apparatus relating to a controller for controlling a light emitting array by setting a power level provided to each individual light emission source within the light emitting array is provided. The controller includes a processor for executing instructions and a memory device for storing data. The data from the memory device provides individual instruction for a power level required for each individual light emission source to achieve a normalized detection of light within the fluorometer. A method of manufacturing a controller for controlling the emission of light in a fluorometer includes analyzing the well values of illumination and storing power level values in a memory device corresponding to predetermined illumination levels of the illumination sources.