US 2022/0189758 A1Published application

Time-of-flight mass spectrometer

AssigneeShimadzu Corporation

InventorsYusuke TATEISHI, Hiroyuki MIURA, Hideaki IZUMI

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Abstract

Provided is a time-of-flight mass spectrometer including: a loop-orbit defining electrode (21) including an outer electrode (211) and inner electrode (212) located on the outside and inside of a loop orbit, respectively; an ion inlet (22); an ion outlet (23) provided in either the outer or inner electrode; a loop-flight voltage applier (28) configured to apply loop-flight voltages to the outer and inner electrodes, respectively; a set of deflecting electrodes (24) facing each other across a section of an n-th loop orbit, where n is a predetermined number, the deflecting electrodes including a first portion (241) which faces the n-th loop orbit and a second portion (242) which includes other portions; and a voltage applier (29) configured to apply deflecting voltages to the first portion so as to reverse the drifting direction of the ions flying in the n-th loop orbit, and a voltage to the second portion so as to create the loop-flight electric field.

Claims6

Dependent claims

A time-of-flight mass spectrometer, comprising:

a loop-orbit defining electrode configured to create a loop-flight electric field for defining a loop orbit in which ions are made to repeatedly turn while gradually drifting in a predetermined direction for each turn, the loop-orbit defining electrode including an outer electrode located on an outside of the loop orbit and an inner electrode located on an inside of the loop orbit;
an ion inlet for introducing ions into the loop orbit;
an ion outlet for releasing ions from the loop orbit;
a loop-flight voltage applier configured to apply loop-flight voltages to the outer electrode and the inner electrode, respectively, so as to create the loop-flight electric field;
a set of deflecting electrodes facing each other across a section of an n-th loop orbit, where n is a predetermined number, the deflecting electrodes including a first portion which faces the n-th loop orbit and a second portion which includes other portions;
and
a voltage applier configured to apply a deflecting voltage to the first portion so as to reverse the drifting direction of the ions flying in the n-th loop orbit, and a voltage to the second portion so as to create the loop-flight electric field.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/466,565Filed 3 Sep 2021
Priority: JP 2020-20746415 Dec 2020
Published: 16 Jun 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H01J 49/408
Time-of-flight spectrometers: with multiple changes of direction, e.g. by using electric or magnetic sectors, closed-loop time-of-flight
H01J 49/061
Electron- or ion-optical arrangements: ion deflecting means, e.g. ion gates
H01J 49/405
Time-of-flight spectrometers: characterised by the reflectron, e.g. curved field, electrode shapes
H01J 49/406
Time-of-flight spectrometers: with multiple reflections