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公开(公告)号：US20240284581A1
公开(公告)日：2024-08-22
申请号：US18571695
申请日：2023-05-09
发明人： Patrick LANCUBA , Sean KELLOGG
摘要： An apparatus for plasma control is disclosed. The apparatus comprises: a plasma generator comprising two electrodes, an anode and a cathode, configured to produce a plasma between the two electrodes; a solenoid coil disposed to surround the plasma and configured to produce a magnetic field parallel to a longitudinal axis between the two electrodes; and circuitry configured for allowing independent timing of the magnetic field with respect to the production of the plasma. A method for plasma control in a spectroscopy system and an optical emission spectrometer using said method are also disclosed.
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公开(公告)号：US20230008231A1
公开(公告)日：2023-01-12
申请号：US17780076
申请日：2020-11-03
发明人： Patrick LANCUBA
摘要： A method for controlling the flow of gas through a spectrometer, comprising: flowing a gas through a volume of the spectrometer, the volume being a volume through which light from a sample passes along a first path to reach a first detector and the gas being transparent to the light in a spectral region analysed by the spectrometer; transmitting light from a light source along a second path through the gas to a second detector; detecting an intensity of the light from the light source at the second detector at one or more wavelengths of the light; comparing the detected intensity of the light to a respective setpoint corresponding to a desired transmittance of the gas in the volume of the spectrometer and generating at least one error signal based on the comparison; and adjusting a flow rate of the gas through the volume of the spectrometer based on the error signal, in particular to minimise the difference between the detected intensity and setpoint.
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公开(公告)号：US20240255432A1
公开(公告)日：2024-08-01
申请号：US18560906
申请日：2022-05-03
发明人： Patrick LANCUBA
IPC分类号： G01N21/71
CPC分类号： G01N21/718 , G01N2201/06113 , G01N2201/0636
摘要： A method for compositional analysis, in particular laser-induced breakdown spectroscopy (LIBS), includes providing a sample having a surface, moving an ablation point to a plurality of positions on the surface along an arc path defined by a plurality of arcs, wherein the plurality of arcs extend from an edge of the area to another edge of the area, wherein the arc path follows adjacent arcs of the plurality of arcs, pulsing an energy source to provide an electromagnetic energy beam to ablate material at the ablation point, collecting an emission spectrum in response to pulsing the energy source, and analyzing the emission spectrum to determine a composition at the surface.
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