ETP Ion Detect supplies electron multipliers
for all major industry mass spectrometers.
This allows for the simultaneous detection of a range of energies in the photoelectron spectra and thereby improves the data quality for a given period of data accumulation, compared to using a conventional electron multiplier
behind an exit slit.
The transmission of the ions, continuously produced in the ion source of a quadrapole mass spectrometer, through the quadrapole mass filter to the electron multiplier
is relatively inefficient (<5%, see Figure 5a).
Tenders are invited for Procurement of electron multiplier
prescaling for icpms 820
The electron multiplier
voltage was set at 600 V above the El-tune voltage.
Positive ion detection may be achieved using either a Faraday plate detector or an analogue Channel Electron Multiplier
(CEM) if better detection limits are required.
The first-generation systems' stacked tube array was replaced in the second-generation [I.sup.2] tube with a small electron multiplier
called a microchannel plate (MCP).
Typically, the electron multiplier
's sensitivity can be optimized to obtain a maximum signal with minimum noise.
Measuring 16 mmx 12 mm, the R7400U's 8-stage electron multiplier
produces a noise-tree gain of 700,000 times.
With available Faraday and electron multiplier
detectors, low level contamination in the vacuum system can be identified.
LED (light-emitting diode) indicators provide instant feedback on the status of the electron multiplier
, filament, electronics system, and the probe.