Time-of-flight ion mass analyzer

Details Time-of-flight ion mass analyzer Time-of-flight ion mass analyzer

1984-07-18

1986-09-09

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

250281, H01J 4940

Patent

active

046111182

ABSTRACT:
A time-of-flight ion mass analyzer comprises a device for preacceleration of ions being analyzed and a sensing member of the analyzer detecting the moment at which an ion enters a time-of-flight space, a reflector and an electron detector connected to a time interval measurement device, which are provided in series downstream the preacceleration device. The reflector has at least two grid electrodes: an intermediate electrode and a bottom electrode. The intermediate electrode is designed to receive a potential which creates, in the reflector space, two zones divided in accordance with electric field steepness, and a difference of potentials between the bottom electrode of the reflector and the sensing member of the analyzer is chosen in the absolute value such as to be greater than, or equal to, the potential difference at the preacceleration device.

REFERENCES:
patent: 3727047 (1973-04-01), Janes
patent: 3955084 (1976-05-01), Giffin
patent: 4072862 (1978-02-01), Mamyrin et al.
Gloecker et al., Time of Flight Technique for Particle Identification at Energies from 2-400 keV/Nucleon, Nuclear Inst. and Meth., vol. 165, No. 3, (1979).
Challenge Comet Halley Neutral Gas Experiment, Proposal Submitted to ESA in Response of Giotta Call for Experiment Proposals, 1980.

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