Analyzer apparatus and control method
AssigneeAtonarp Inc.
InventorsPrakash Sreedhar Murthy, Anoop R. Hegde, Takeshi Sato
Life of this patent
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Abstract
An analyzer apparatus (1) includes: an ionization unit (11) that ionizes molecules to analyze; a filter unit (13) that forms a field for selectively passing ions generated by the ionization unit; a detector unit (14) that detects ions that have passed through the filter unit; an ion drive circuitry (61) that electrically drives the ionization unit; a field drive circuitry (62) that electrically drives the filter unit; and a control unit (22) that controls outputs of the ion drive circuitry and the field drive circuitry, wherein the control unit controls the ion drive circuitry to ramp up and down a filament voltage supplied to a filament of the ionization unit when the analyzer apparatus starts and stops.
Claims5
An analyzer apparatus comprising:
- an ionization unit that ionizes molecules to analyze;
- a filter unit that forms a field for selectively passing ions generated by the ionization unit;
- a detector unit that detects ions that have passed through the filter unit;
- an ion drive circuitry that electrically drives the ionization unit;
- a field drive circuitry that electrically drives the filter unit;
- and
- a control unit that controls outputs of the ion drive circuitry and the field drive circuitry;
- wherein:
- the control unit includes a stabilizing unit that stabilizes an emission current of the ionization unit via the ion drive circuitry,
- the stabilizing unit includes:
- a first unit that controls a filament voltage supplied to a filament of the ionization unit to ramp up or down so that a difference between the emission current and a target current is within 1%;
- and
- a second unit that controls the filament voltage by feedback control so that the difference between the emission current and the target current is within 0.1%.
A control method of an analyzer apparatus, the analyzer apparatus including:
- an ionization unit that ionizes molecules to analyze;
- a filter unit that forms a field for selectively passing ions generated by the ionization unit;
- a detector unit that detects ions that have passed through the filter unit;
- an ion drive circuitry that electrically drives the ionization unit;
- a field drive circuitry that electrically drives the filter unit;
- and
- a control unit that controls outputs of the ion drive circuitry and the field drive circuitry,
- wherein the control method includes;
- stabilizing an emission current of the ionization unit via the ion drive circuitry, and
- the stabilizing includes:
- controlling a filament voltage supplied to a filament of the ionization unit to ramp up or down so that a difference between the emission current and a target current is within 1%;
- and
- feedback controlling the filament voltage so that the difference between the emission current and the target current is within 0.1%.
Dependencies are inferred from the claim text.