Process Mass Spectrometers » MGA iSCAN » Technology
The MGA iSCAN is a magnetically scanned double focusing magnetic sector mass spectrometer. As the MGA iSCAN is double focusing, it utilizes both electric and magnetic sectors to provide high resolution and sensitivity.
The MGA iSCAN can be equipped with a proprietary ion source that allows the user to measure reactive gases. Reactive gases are considered any compound that could potentially chemically interact with the MGA iSCAN hardware.
The sample gas is presented to the iSCAN's cabinet's inlet where a small sample is drawn from that sample into a capillary line. The gas sample is then transported through the capillary line to an inlet leak mechanism that permits an extremely small sample to enter the mass spectrometer's high vacuum. The gas sample is then ionized by impacting with a electron beam which is emitted from a dual filament source. The positively charged ions are then accelerated out of the ion source and into the analyzer.
The ions then travel to an electric sector, which acts as an energy-filtering device. The electric sector sorts the ions by their energy. This filtering improves the resolution of the mass spectrometer. The ions then enter the scanning magnetic sector where the ions are sorted by their momentum.
At this point, the ions will either travel to a Faraday collector/electrometer combination or an Electron Multiplier Tube (EMT)/pulse counter for detection. The selection of which detector is used is based on the concentration of the gas being detected. By using both the Faraday collector and the EMT, the MGA iSCAN can analyze components at sub-ppm and percent levels.
The high vacuum within the MGA iSCAN is created and maintained by utilizing both a turbomolecular and mechanical rough vacuum pumps. With proper maintenance, these pumps will have a long service life.
The MGA Story
The MGA product family was originally designed manufactured and supported from Hamilton Sundstrand's Pomona, California facility (formerly Perkin-Elmer) since 1975.
In 1996, Hamilton Sundstrand acquired the MGA Trademark and Tradename from Perkin-Elmer and reengineered the MGA 1200 and MGA 1600. More recently, we introduced the new MGA iSCAN, the most advanced process mass spectrometer available.
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