Mass spectrometer

Details Mass spectrometer Mass spectrometer

Filed on

2005-02-08

Date issued

2005-02-08

Examiner

Lee, John R. (Department: 2881)

Patent Class

Radiant energy

SubClass

Ionic separation or analysis

SubSubClass

Cyclically varying ion selecting field means

Other Related Categories

C250S281000, C250S282000, C250S287000, C250S288000, C250S290000

Type

Reexamination Certificate

Status

active

Patent number

06852972

Description

ABSTRACT:
Heavy ions are ejected earlier than light ions sequentially at almost zero energy and they are accelerated at a fixed voltage so as to be guided to a pusher of a TOF spectrometer. After ions are ejected in a procedure of giving an electric field gradient to an ion trap and linearly decreasing its RF voltage, a condition of spatially focusing ions having all mass numbers of a single point on the pusher is found. The focused ions are vertically accelerated using the pusher to perform the TOF mass spectrometry.

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