Residual Gas Mass Spectroscopy Specifications:
- Stanford Research Systems RGA200 Residual Gas Analyzer
- Mass Range: 1 to 200 amu
- Mass Filter Type: Quadrupole
- Detector Type: Faraday Cup and Electron Multiplier
- Resolution: Greater than 0.5 amu at 10% peak height
- Minimum Detectable Partial Pressure: 5 x 10-11 Torr with Faraday Cup
- Minimum Detectable Partial Pressure: 5 x 10-14 Torr with Electron Multiplier
- Operating Pressure Range: 10-4 Torr to UHV with Faraday Cup
- Operating Pressure Range: 10-6 Torr to UHV with Electron Multiplier
- Ionizer: Open, cylindrical symmetry ion source
- Filament: Thoriated Iridium
Residual Gas Mass Spectroscopy Applications:
- Detection of outgassed airborne silicone materials
- Outgassing of water from materials
- Identification of chemicals outgassed by materials
- Chemical purity checks
- Identification of volatile contaminants
- Leak detection for vacuum systems
How does Residual Gas Mass Spectroscopy Work?:
The RGA efficiently identifies the chemical constituents of gases within a vacuum by ionizing the present gases, creating ions, and subsequently determining their mass-to-charge ratio.
A standard RGA is comprised of key components: the sensor, the interface box, and the controller.
Within the sensor, the RGA generates a stream of ions through gas collisions with electrons emitted from a hot cathode. These ions are then filtered based on their mass-to-charge ratio, denoted as m/z. The resulting output current serves as a measurement of the abundance of ions with a specific m/z that successfully pass through the filter. Detection of this current occurs at the detector, facilitated by either a Faraday cup or a Secondary Electron Multiplier.
The signals, processed initially by the interface electronics and subsequently by the control unit, generate a graphical representation on the x-axis depicting the m/z ratio, while the y-axis represents the corresponding ion current.
Reach out to us today to discuss your materials analysis concerns and we will discuss how our 25+ experience can help you and your company with your materials concerns.
