For the analysis of positive and negative ions, neutrals, and radicals from plasma processes

The EQP system is a combined mass spectrometer and energy analyser for the analysis plasma ions, neutrals and neutral radicals. The EQP instrument includes operating modes for positive ion, and negative ion analysis. Threshold ionization and electron attachment ionization modes are available for detailed neutral radical studies, for analysis of both electro-positive and electro-negative plasma radicals.
The EQP system is now available with integrated MCS – multi channel scalar data acquisition with time resolution to 50 nano seconds providing for fast data acquisition in pulsed plasma applications.

EQP for the analysis of positive and negative ions, neutrals, and radicals from plasma processes


Hiden plasma probes measure some of the key plasma parameters and provide detailed information relating to plasma reaction chemistry.

Detailed understanding of the reaction kinetics of plasma ions and neutral species plays a key role in the development of advanced surface engineering processes such as HIPIMS.

The integral electron bombardment ion source provides for analysis of neutrals and, with the addition of the EAMS (electron attachment mass spectrometry) electron attachment mode, for separation and identification of electronegative radical species.


  • Software controlled Ion Extraction Optics for minimum plasma perturbation
  • 45° Electrostatic Sector analyser, Scan Energy at 0.05 eV increments/ 0.25eV FWHM
  • Minimum perturbation of ion flight path & constant ion transmission at all energies
  • Differentially pumped Triple filter Quadrupole, mass range options to 5000amu
  • High Sensitivity / Stability Pulse Ion Counting Detector with 7 decade dynamic range
  • Tuneable integral ioniser for appearance potential MS with electron attachment option
  • Penning Gauge and interlocks to provide over pressure protection
  • Signal gating and programmable signal gating option for time resolved studies in pulsed plasma
  • 1000eV Option, Floating option up to 10keV, Faraday Cup for high density plasmas
  • Mu-Metal, Radio-metal shielding options, high pressure operation option
  • MASsoft control via RS232, RS485 or Ethernet LAN




The system is supplied with MASsoft Professional software.

This Windows 8 and Windows 10 compatible software allows control of the instrument via USB 2.0, RS232 or Ethernet. Provides comprehensive I/O for data output and for reading data from external devices for integration and display with mass spectrometer data.



Ames Technology Capabilities and Facilities | Plasma Diagnostics

PSI – Paul Scherrer Institut | Plasma & Thin Film Analysis