A dual mode RGA system for vacuum diagnostics and process monitoring without differential pumping

Measures the residual gases, process contaminates and provides for leak detection

The Hiden HMT quadrupole mass spectrometer is a unique dual mode RGA system capable of operating at pressures up to 4 x 10^-3 mbar without the need for differential pumping. Operation at this pressure is achieved using a specially designed ion source/quadrupole filter combination and software which corrects for abundance non-linearity. The unique high pressure specification makes the HMT ideal for process monitoring applications.

Overview

The HMT can also operate in RGA mode in the same way as a traditional quadrupole RGA. Faraday / electron multiplier detectors provide partial pressure sensitivities in the 10^-13 mbar range.

Features

• HMT mode for high pressure operation to 4x10^-3 Torr (min detectable partial  pressure 4 x 10^-8 Torr)
• RGA mode for high sensitivity operation at P < 10^-4 Torr (min detectable partial pressure 1 x 10^-11 Torr)
• 100 amu mass range, Remote (PC) Control interface via MASsoft Professional PC software
• Stability (less than ±1% height variation over 24 h)
• MASsoft software control via RS232, USB or multiple systems via Ethernet LAN
• Fast access, mixed mode scanning  Trend and Analog in multiple windows for example
• Simultaneous real time display of graphical and tabular trend analysis data
• Cursor for peak height identification under mouse control
• Real time background subtract, Automatic mass scale alignment
• Data export facility to ASCII format and to all Windows devices
• Dynamic Data Exchange facility for real time data transfer to other DDE client compatible Windows™ applications e.g. Excel, SPC-IV statistical process control software

Specifications