Mass spectrographs and ion collector systems therefor

Details Mass spectrographs and ion collector systems therefor Mass spectrographs and ion collector systems therefor

1974-04-10

1976-03-23

Willis, Davis L.

Radiant energy

Ionic separation or analysis

250283, B01D 5944

Patent

active

039462277

ABSTRACT:
To provide electrical outputs from very closely spaced ion collectors in a mass spectrograph, use is made of appropriately positioned wires or tapes which emit secondary electrons when struck by ions. The secondary electrons in turn strike respective scintillators to generate light. Lightguides, such as glass fibres, conduct the light from the scintillators to respective photomultipliers, which can therefore be spaced as necessary, the bulk of the photomultipliers being much greater than the spacing of the ion collector wires.
The wires or tapes can be in a single row in the focal plane, or in rows staggered about the focal plane.

REFERENCES:
patent: 3240931 (1966-03-01), Wiley et al.
patent: 3426192 (1969-02-01), Brunnee et al.
patent: 3522428 (1970-08-01), Powers
patent: 3579270 (1971-05-01), Daly
patent: 3717762 (1973-02-01), Grenier et al.
patent: 3786249 (1974-01-01), Anbar et al.
patent: 3812354 (1974-05-01), Walter

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