Ion selector

Details Ion selector Ion selector

2005-04-13

2009-08-25

Berman, Jack I (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

C250S286000, C250S282000, C250S281000

Reexamination Certificate

active

07579586

ABSTRACT:
The present invention provides an ion selector gate having a first deflection zone32and a second deflection zone34spaced from the first deflection zone, wherein in use, a single low voltage trigger pulse generated by timing electronics with a width in time equal to or proportional to the width of the gate pulse Tgdand at a position in time that the ion gate is required to be open to allow through ions of the correct nominal mass. The trigger pulse may go through an inverter38and then to two high voltage pulsers40and42. The high voltage pulsers each produce simultaneously a signal that switches to ground and back on again from the same amplitude high voltage but the opposite polarity. The outputs of the high voltage pulsers are connected to interleaved wires of both ion gates32, 34. Thus, the high voltage pulsers are applied simultaneously to both ion gates.

REFERENCES:
patent: 4633083 (1986-12-01), Knorr et al.
patent: 6348688 (2002-02-01), Vestal
patent: 6489610 (2002-12-01), Barofsky et al.
patent: 2004/0144918 (2004-07-01), Zare et al.
patent: 2 076 588 (1981-12-01), None
patent: WO 98/33203 (1998-07-01), None
Kimmel et al., Novel method for the production of finely spaced Bradbury-Nielson gates, Dec. 2001, Review of Scientific Instruments, vol. 72 Num 12, pp. 4354-4357.

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