Ion Source Options.

Open Ion Source. (Fitted as Standard) This ion source is used for residual gas analysis and simple gas analysis applications.	>
	<	Axial Beam Ion Source. This ion source is specifically for analysing either molecular beams or ion beams from an external source. The ion source has a low profile with side mounted filaments so that the source can be positioned close to the exit hole of a source of ions or molecular beam that is in line with the axis of the quadrupole.
Cross Beam Ion Source. This source is for molecular beams that enter the ion source at right angles to the quadrupole. A clear aperture of 3,5mm avoids contact with the molecular beam. This source is normally used in applications where condensable vapors may be present within the molecular beam that could contaminate the quadrupole filter.	>
	<	NIBTRON Ion Source. This source is specially for gas analysis only and has many unique advantages to the traditional gas tight Ion Source.

.Mass Filter Options.

Single Mass Filter.  (Fitted as Standard) A Low cost single stage mass filter using cylindrical rods for low mass applications.

Saddle mounted Filter. A high precision saddle mounted mass filter is available as an option on our range of instruments. It is easily de-mounted for cleaning. This enclosed filter offers improved sensitivity, resolution and abundance sensitivity.

Dual & Triple filters. These are available based on saddle mounted mass filters, and are normally chosen for special applications or when the highest performance/resolution is required.. Available on the AX800 instrument only.

Detector Options.

Faraday Only. A Faraday plate detector for ion collection. Used mainly for higher pressure applications when greater ion currents are available for collection.

Dual Faraday/Channeltron. The Channeltron (SEM) provides a high level of amplification of the ion beam and therefore provides detection of much lower ion currents. When in SEM mode the pre-amplifier can be operated at a lower gain and faster scanning speeds are possible.

Discreet SEM. A discreet dynode Electron multiplier is available on the AX800 as an alternative to the Channeltron Electron Multiplier. This has much larger surface area of secondary electron electrodes and therefore offers much longer life when operating on continuous high signal levels over prolonged periods of time. The Faraday option is not available when this device is fitted.

Pulse Counting. Provides the ultimate in detection by counting individual ions arriving at the detector.. Normally used in trace gas analysis applications where the lowest level of detection is required. A special version of the electronics is available that includes a counting pre-amplifier, system clock, counter, and interface for transferring the accumulated ion count to the quadrupole software for display. (Special order)

High Temperature Operation

Thermal Extender. Allows operation of the quadrupole whilst the analyser is at high temperature This option is available on most of our RGA instruments and has to be fitted to the analyser at the time of manufacture. It extends the back of the analyser  by approx 24 cms so the plug-on electronics is now separated from the analyser hot zone.

Filament Options

Technical Notes.