Em

(redirected from electron multiplier)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia, Wikipedia.

EM

See: Effective margin

Em

A unit of length used in printing. An em is one-sixth of an inch. It is also called a pica.
Mentioned in ?
References in periodicals archive ?
The ions subsequently, are destabilized and ejected with 50% efficiency to the electron multiplier by a rapid ramping of the RF voltage applied to the central ring electrode.
Fast automated full scan GC/MS analyses of difficult trace analytes in industrial and biological matrices
Electron multipliers detect and convert ions to a signal.
Achieving maximum sensitivity in GC-MS: all conditions used for measuring S/N should be the same for both the S/N calculations and for all other routine analyses
The high performance 5905 MAGNUM electron multiplier is specifically designed for Thermo Finnigan Mass Spectrometer instruments.
Electron multiplier for mass spectrometry
The prototypical RGA consists of an open ion source, a quadrupole mass filter, and a Faraday cup ion detector that may or may not be enhanced by an electron multiplier. Recall that as gases enter an RGA, they become ionized in the ion source by energetic electrons from a heated filament wire.
Getting the most from your RGA
The GC-MS was run with the electron multiplier set at 1600 eV and an injection volume of 1.5 [micro]L.
Lowering cutoffs for initial and confirmation testing for cocaine and marijuana: large-scale study of effects on the rates of drug-positive results
An electron multiplier behind the slit amplifies the electron signals.
XPS is a versatile tool for surface analysis

Financial browser ?
Full browser ?