US 10,475,635 B2Granted

Voltage application method, voltage application device, and time-of-flight mass spectrometer

AssigneeShimadzu Corporation

InventorTomoyuki Oshiro

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Abstract

Voltages are applied by a voltage application device having an electrode circuit including a plurality of electrode connection parts connected in series via a resistance R between neighboring electrode connection parts; and power sources P for outputting both positive and negative polarities, each power source connected to both ends of the electrode circuit. The method of applying a voltage includes determining a polarity and a magnitude of an output voltage of so that a voltage having a predetermined polarity and magnitude is applied to the electrodes; and based on the polarities, switching the polarities of the output voltages by switching the polarities of the output voltages of the plurality of power sources P one at a time while maintaining a state where a polarity of an output voltage of at least one power source P, among the plurality of power sources P, is different from others.

Claims6

Dependent claims

A method of applying voltages to a plurality of electrodes each respectively connected to a plurality of electrode connection parts, by employing a voltage application device including:

an electrode circuit including the plurality of electrode connection parts connected in series via a resistance between neighboring electrode connection parts;
and power sources capable of outputting a voltage of both positive and negative polarities, the power sources being respectively connected to both ends and at least in one intermediate position of the electrode circuit, the method comprising the steps of:
a) determining a polarity and a magnitude of an output voltage of each of the plurality of power sources so that a voltage having a predetermined polarity and magnitude is applied to each of the plurality of electrodes;
and
b) based on the polarities of the output voltages of the plurality of power sources, switching the polarities of the output voltages of the plurality of power sources by switching the polarities of the output voltages of the plurality of power sources one at a time while maintaining a state where a polarity of an output voltage of at least one power source among the plurality of power sources is different from others.

2 more elements

A voltage application device, comprising:

a) an electrode circuit including a plurality of electrode connection parts connected in series via a resistance between neighboring electrode connection parts;
b) a plurality of power sources capable of outputting a voltage of both positive and negative polarities, the plurality of power sources being respectively connected to both ends and at least in one intermediate position of the electrode circuit;
c) a storage section in which output voltage information and polarity switching order information determined based on the output voltage information are stored, the output voltage information being information on the polarity and the magnitude of the output voltage of each of the plurality of power sources and the polarity switching order information being information on an order of switching the polarities of the output voltages of all the power sources by switching the polarity of the output voltage of the plurality of power sources one at a time while maintaining a state where the polarity of the output voltage of at least one power source among the plurality of power sources, is different from others;
and
d) a power source control unit for outputting the voltages with the polarities and the magnitude based on the output voltage information, from the plurality of power sources and switching in turn the polarities of the output voltages of the plurality of power sources, based on the polarity switching order information at a predetermined timing.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/085,186Filed 18 Mar 2016
Published: US 2019/0088460 A121 Mar 2019
Granted: 12 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01J 49/401
Time-of-flight spectrometers: characterised by orthogonal acceleration, e.g. focusing or selecting the ions, pusher electrode
H01J 49/022
Details: circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply
H01J 49/067
Electron- or ion-optical arrangements: ion lenses, apertures, skimmers
H01J 49/40
Dynamic spectrometers: time-of-flight spectrometers