摘要:
Die Erfindung betrifft ein Verfahren zum Überprüfen der Einstellung einer einen entlang seiner Längsrichtung geförderten rohrförmigen Strang erzeugenden Extrusionsvorrichtung, wobei die Austrittsweiten für extrudiertes Material an einer Oberseite und an einer Unterseite einer Extrusionsdüse der Extrusionsvorrichtung unterschiedlich eingestellt ist, wobei das Verfahren folgende Schritte umfasst: • mittels einer Terahertz-Messeinrichtung wird an einer ersten Messposition stromab zumindest einer ersten Kühlstrecke für den rohrförmigen Strang, an der der rohrförmige Strang noch nicht vollständig erstarrt ist, der Brechungsindex über den Querschnitt mindestens einer Wand des rohrförmigen Strangs gemessen, • mittels der Terahertz-Messeinrichtung werden an der ersten Messposition weiterhin an mindestens einem Messort an der Oberseite und an mindestens einem Messort an der Unterseite des rohrförmigen Strangs Geometriewerte gemessen, wobei die Geometriewerte die Wanddicke und/oder den Innen- und/oder Außendurchmesser des rohrförmigen Strangs umfassen, • für den gemessenen Brechungsindex und für ein Verhältnis der an der Oberseite und an der Unterseite des rohrförmigen Strangs gemessenen Geometriewerte wird anhand eines zuvor bestimmten Kalibrierzusammenhangs zwischen dem Brechungsindex an der ersten Messposition und dem Verhältnis der Austrittsweiten für extrudiertes Material an der Oberseite und an der Unterseite der Extrusionsdüse das Verhältnis der an der Extrusionsvorrichtung eingestellten Austrittsweiten für extrudiertes Material an der Oberseite und an der Unterseite der Extrusionsdüse überprüft. Die Erfindung betrifft außerdem eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens.
摘要:
A method is provided for determining the solubility parameters for a process stream via the joint use of turbidimetric detection of asphaltenes flocculation, which is used to determine and detect the onset flocculation of asphaltenes of the process stream, and a refractive index to determine the process stream solubility parameters such as the solubility blending number and insolubility number.
摘要:
A prism (1090) is configured from a dielectric medium and is used in analysis using surface plasmons. The prism (1090) is provided with an incidence surface (1170) on which excitation light from outside is incident, a reflection surface (1172) on which excitation light having entered the incidence surface (1170) is reflected, an emission surface (1174) from which excitation light reflected by the reflection surface (1172) is emitted, and an opposing surface (1175) opposing the reflection surface (1172). A gold film (1092) is formed on the reflection surface (1172). The opposing surface (1175) has a sink-mark surface (1200), and the sink-mark surface (1200) is a transparent surface.
摘要:
A system and method for the monitoring of carbon dioxide (CO2) for chemical contaminants. The carbon dioxide monitoring system includes a contaminant sensor that is configured to detect trace amounts of contaminants in CO2 that is pumped through it in real time. The contaminant sensor includes an interferometer configured to track the amount of contaminants.
摘要:
Systems and methods of controlling a deposition rate during thin-film fabrication are provided. A system as provided may include a chamber, a material source contained within the chamber, an electrical component to activate the material source, a substrate holder to support the multilayer stack and at least one witness sample. The system may further include a measurement device and a computational unit. The material source provides a layer of material to the multilayer stack and to the witness sample at a deposition rate controlled at least partially by the electrical component and based on a correction value obtained in real-time by the computational unit. In some embodiments, the correction value is based on a measured value provided by the measurement device and a computed value provided by the computational unit according to a model.
摘要:
A disposable measurement tip for an instrument for measuring at least one parameter of a sample, the measurement tip comprising; a tip body; a filling channel in the tip body for holding the sample to be analyzed and having an opening on one end of the tip body to receive the sample; a population of micro-particles held within the tip body filling channel and which can be mixed with the sample when the sample is received in the filling channel; wherein in use the sample in the tip is illuminated by the instrument and the illumination which impinges on the micro-particles is directed back, by the micro-particles, to the instrument to be detected and to thereby enable the at least one parameter to be determined.
摘要:
Systems and methods of controlling a deposition rate during thin-film fabrication are provided. A system as provided may include a chamber, a material source contained within the chamber, an electrical component to activate the material source, a substrate holder to support the multilayer stack and at least one witness sample. The system may further include a measurement device and a computational unit. The material source provides a layer of material to the multilayer stack and to the witness sample at a deposition rate controlled at least partially by the electrical component and based on a correction value obtained in real-time by the computational unit. In some embodiments, the correction value is based on a measured value provided by the measurement device and a computed value provided by the computational unit according to a model.
摘要:
Techniques include receiving a design of an integrated computational element (ICE), the ICE design including specification of a substrate and a plurality of layers, their respective target thicknesses and complex refractive indices, complex refractive indices of adjacent layers being different from each other, and a notional ICE fabricated in accordance with the ICE design being related to a characteristic of a sample over an operational wavelength range; forming at least some of the layers of the ICE in accordance with the ICE design; optically monitoring, during the forming, optical properties of the formed layers using quasi-monochromatic probe-light having a probe wavelength that is outside of the operational wavelength range of the ICE; and adjusting the forming, at least in part, based on the optically monitored optical properties of the formed layers of the ICE.