Magnetic field scanning

Magnetic-field scan. The usual method of producing a momentum (mass) spectrum in instruments. 

For Equation 6.7 to be valid it is assumed that all other experimental conditions are equal for the two samples. If this is not true, additional corrections may be required for differences in modulation amplitude (M), microwave power attenuation in IdBI OP), magnetic field scan width (W) (or equivalently, the step width in gauss between two subsequent digitization points), electronic gain (G), sample diameter Of), and absolute temperature (I) ... 

Note Typically, on magnetic sector mass spectrometers a spectrum is produced by varying the strength of the magnetic field to successively pass through ions of different m/z- This is termed magnetic field scan. [31]... 

Millington, D.S. Smith, J.A. Fragmentation Patterns by Fast Linked Electric and Magnetic Field Scanning. Org. Mass Spectrom. 1911,12, 264-265. 

Figure 18. Conventional and old muonum resonance lines. Observed Vjj resonance lines obtained by a magnetic field scan with fixed microwave...

Typically, the electric sector is held constant at a value which passes only ions having the specific kinetic energy. Therefore, the parameter that is most commonly varied is the magnetic field strength B, A magnetic field scan can be used to... 

Note Typically, on magnetic sector mass spectrometers a spectrum is produced by varying the strength of the magnetic field to successively pass through ions of different m/z- This is termed magnetic field scan [73]. For scans linear in time, the scan rate is given in units of m/z s , e.g., 500 m/z s . For scans exponential in time, the scan rate is reported in units of s per decade, e.g., 10 s/decade means 10 s from m/z 30 to 300 or from m/z 100 to 1000. 

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