Abstract: A power supply device applies a voltage to a quadrupole mass filter. The power supply device has a main substrate and a wave-detection substrate. The main substrate includes a detector. The wave-detection substrate includes a wave detector and an identifier. The wave detector detects an AC component of a voltage to be applied to the quadrupole mass filter as a wave-detection voltage. The identifier outputs identification information of the wave detector defined in correspondence with the configuration of a rectifying device of the wave detector. The detector detects identification information output by the identifier, and supplies the detected identification information to a corrector that corrects a deviation of voltage caused by a leakage current of the rectifying device.

Abstract: An ion analyzer 2 including: a power feeding circuit 26 in which a power supply connection part 261, a first electrode connection part 262, a first resistance element 263, a second electrode connection part 264, a second resistance element 265, and a grounding part are provided in series; a power supply P connected to the power supply connection part 261 and configured to output both a DC positive voltage and a DC negative voltage; a first voltage supply electrode 23 connected to the first electrode connection part 262; and a second voltage supply electrode 24 connected to the second electrode connection part 264. In particular, it can be suitably used as a device for applying a voltage to a push electrode 23 and a convergence electrode 24 disposed in an ionization chamber 20 of a mass spectrometer including an ESI source 21.

Abstract: An acceleration voltage generator is configured to cause a power MOSFET to turn on or off to switch a high direct-current voltage, so as to generate a high-voltage pulse for an ejection of ions from an ion ejector. A drive signal is used to cause the power MOSFET to turn on, and further includes a secondary drive signal to recharge a gate capacitance to cause the power MOSFET to stay in an on-state. In a drive signal generator, edge detection circuits generate an edge detection signal based on a start signal; selection circuits generate a primary drive signal by adjusting the edge detection signal in its signal width; and a secondary drive signal generator includes multiple circuit elements such as a semiconductor element, and generates the secondary drive signal.

Abstract: An analytical device includes: a first acceleration unit including a first acceleration electrode to which a pulse voltage for accelerating ions is applied; a flight tube; a second acceleration unit that is arranged between the first acceleration unit and the flight tube, and includes a second acceleration electrode to which a voltage for accelerating the ions is applied; an ion detector that detects the ions; and a capacitance adjustment unit that causes adjustment of a capacitance between at least one set of electrodes among a plurality of electrodes arranged in the first acceleration unit, the second acceleration unit, and a flight tube.

Abstract: An analytical device includes: a first electrode to which a pulse voltage for accelerating ions is applied; at least one switching element that controls application of the pulse voltage to the first electrode; a second electrode that defines a space in which the ions fly; an ion detector that detects the ions; and a vacuum vessel that has the second electrode inside, wherein: the switching element is in contact with an insulator, and the insulator is in contact with the vacuum vessel.

Abstract: An acceleration voltage generator (7) generates a high-voltage pulse to be applied to an electrode in an orthogonal accelerator by turning on/off a high DC voltage generated by a high-voltage power source through MOSFETs (741) in a switch circuit (74). A controller (6) sends driving pulse signals to the switch circuit (74) through a primary-side driver section (71), transformer (72) and secondary driver section (73). An adjustment circuit (742) formed by a gate resistor (742a) and gate capacitor (742b) is provided between the secondary-side driver section (73) and the MOSFET (741). The resistance value of the resistor (742a) and the capacitance value of the capacitor (742b) are determined so as to suppress an overshoot of the gate voltage due to the resonance while preventing a decrease in steepness of the waveform in its rising and falling phases.

Abstract: An acceleration voltage generator is configured to cause a power MOSFET to turn on or off to switch a high direct-current voltage, so as to generate a high-voltage pulse for an ejection of ions from an ion ejector. A drive signal is used to cause the power MOSFET to turn on, and further includes a secondary drive signal to recharge a gate capacitance to cause the power MOSFET to stay in an on-state. In a drive signal generator, edge detection circuits generate an edge detection signal based on a start signal; selection circuits generate a primary drive signal by adjusting the edge detection signal in its signal width; and a secondary drive signal generator includes multiple circuit elements such as a semiconductor element, and generates the secondary drive signal.

Abstract: An analytical device includes: a first acceleration unit including a first acceleration electrode to which a pulse voltage for accelerating ions is applied; a flight tube; a second acceleration unit that is arranged between the first acceleration unit and the flight tube, and includes a second acceleration electrode to which a voltage for accelerating the ions is applied; an ion detector that detects the ions; and a capacitance adjustment unit that causes adjustment of a capacitance between at least one set of electrodes among a plurality of electrodes arranged in the first acceleration unit, the second acceleration unit, and a flight tube.

Abstract: An analytical device includes: a first electrode to which a pulse voltage for accelerating ions is applied; at least one switching element that controls application of the pulse voltage to the first electrode; a second electrode that defines a space in which the ions fly; an ion detector that detects the ions; and a vacuum vessel that has the second electrode inside, wherein: the switching element is in contact with an insulator, and the insulator is in contact with the vacuum vessel.

Abstract: An acceleration voltage generator (7) generates a high-voltage pulse to be applied to an electrode in an orthogonal accelerator by turning on/off a high DC voltage generated by a high-voltage power source through MOSFETs (741) in a switch circuit (74). A controller (6) sends driving pulse signals to the switch circuit (74) through a primary-side driver section (71), transformer (72) and secondary driver section (73). An adjustment circuit (742) formed by a gate resistor (742a) and gate capacitor (742b) is provided between the secondary-side driver section (73) and the MOSFET (741). The resistance value of the resistor (742a) and the capacitance value of the capacitor (742b) are determined so as to suppress an overshoot of the gate voltage due to the resonance while preventing a decrease in steepness of the waveform in its rising and falling phases.

Abstract: An acceleration voltage generator generates a high-voltage pulse applied to a push-out electrode, by operating a switch section to turn on and off a high direct-current voltage generated by a high-voltage power supply. A drive pulse signal is supplied from a controller to the switch section through a primary-side drive section, transformer, and secondary-side drive section. A primary-voltage controller receives a measurement result of ambient temperature of the acceleration voltage generator from a temperature sensor, and controls a primary-side power supply to change a primary-side voltage according to the temperature, thereby adjusting the voltage applied between the two ends of a primary winding of the transformer. The adjustment made on the primary-side voltage changes a slope angle of rise of a gate voltage in the MOSFET, and enables a correction to a discrepancy in the timing of the rise/fall of the high-voltage pulse caused by change in ambient temperature.

Abstract: An acceleration voltage generator (7) generates a high-voltage pulse to be applied to a push-out electrode (11), by operating a switch section (74) to turn on and off a high direct-current voltage generated by a high-voltage power supply (75). A drive pulse signal is supplied from a controller (6) to the switch section (74) through a primary-side drive section (71), transformer (72), and secondary-side drive section (73). The measurement period of a repeated measurement is changed according to a target m/z range. A primary-voltage controller (61) controls a primary-side power supply (76) to change a primary-side voltage according to the measurement period, thereby adjusting the voltage to be applied between the two ends of a primary winding of the transformer (72) by the primary-side drive section (71). The pulse signal fed to the switch section (74) overshoots due to LC resonance.

Abstract: An acceleration voltage generator generates a high-voltage pulse applied to a push-out electrode, by operating a switch section to turn on and off a high direct-current voltage generated by a high-voltage power supply. A drive pulse signal is supplied from a controller to the switch section through a primary-side drive section, transformer, and secondary-side drive section. A primary-voltage controller receives a measurement result of ambient temperature of the acceleration voltage generator from a temperature sensor, and controls a primary-side power supply to change a primary-side voltage according to the temperature, thereby adjusting the voltage applied between the two ends of a primary winding of the transformer. The adjustment made on the primary-side voltage changes a slope angle of rise of a gate voltage in the MOSFET, and enables a correction to a discrepancy in the timing of the rise/fall of the high-voltage pulse caused by change in ambient temperature.

Abstract: A high-voltage power source for applying high voltage to a nozzle of an ESI ion source includes a charge release assistant section including switch circuits and other elements for forcing electric charges accumulated at output terminals to be discharged in a polarity-switching operation, whereby the positive/negative switching of the polarity of the output voltage can be quickly performed. For example, when the voltage applied to the nozzle needs to be changed from V1 to V2 (where V1 and V2 are positive, and V1>V2), a voltage control section operates a positive voltage generation section and negative voltage generation section so as to temporarily provide a negative output voltage. After a predetermined period of time, the voltage control section operates the positive voltage generation section and negative voltage generation section so as to provide voltage V2.

Abstract: An acceleration voltage generator (7) generates a high-voltage pulse to be applied to a push-out electrode (11), by operating a switch section (74) to turn on and off a high direct-current voltage generated by a high-voltage power supply (75). A drive pulse signal is supplied from a controller (6) to the switch section (74) through a primary-side drive section (71), transformer (72), and secondary-side drive section (73). The measurement period of a repeated measurement is changed according to a target m/z range. A primary-voltage controller (61) controls a primary-side power supply (76) to change a primary-side voltage according to the measurement period, thereby adjusting the voltage to be applied between the two ends of a primary winding of the transformer (72) by the primary-side drive section (71). The pulse signal fed to the switch section (74) overshoots due to LC resonance.

Abstract: The present invention is a mass spectrometer (1) for sequentially performing a measurement for a plurality of target ions, characterized by a storage section (41) for holding ion time-of-flight information concerning the time required for each of target ions to fly through each of the sections constituting the mass spectrometer, and a voltage controller (42) for changing, based on the ion time-of-flight information, the voltage applied to each of those sections to a voltage suited for each target ion, with a time lag corresponding to the difference in the timing of the arrival of the target ion at the section concerned.

Abstract: A high-voltage power source for applying high voltage to a nozzle of an ESI ion source includes a charge release assistant section (26) including switch circuits (62 and 65) and other elements for forcing electric charges accumulated at output terminals to be discharged in a polarity-switching operation, whereby the positive/negative switching of the polarity of the output voltage can be quickly performed. In the mass spectrometer according to the present invention, for example, when the voltage applied to the nozzle needs to be changed from Vi to V2 (where V1 and V2 are positive, and V1>V2), a voltage control section (20) under the command of a main controller (9) operates a positive voltage generation section (21) and negative voltage generation section (23) so as to temporarily provide a negative output voltage. After a predetermined period of time, the voltage control section operates the positive voltage generation section (21) and negative voltage generation section (23) so as to provide voltage V2.

Abstract: The present invention is a mass spectrometer (1) for sequentially performing a measurement for a plurality of target ions, characterized by a storage section (41) for holding ion time-of-flight information concerning the time required for each of target ions to fly through each of the sections constituting the mass spectrometer, and a voltage controller (42) for changing, based on the ion time-of-flight information, the voltage applied to each of those sections to a voltage suited for each target ion, with a time lag corresponding to the difference in the timing of the arrival of the target ion at the section concerned.

Abstract: An excessive overshoot preventing unit (16) is connected to a loop in which a command voltage Vf according to a difference between: a voltage obtained by dividing an output voltage Vout as a high voltage; and a control voltage V cont set from the outside is obtained and fed back to each of drive circuits (3 and 5) of a positive voltage generating unit (2) and a negative voltage generating unit (4). The excessive overshoot preventing unit (16) clamps the command voltage Vf at a voltage value according to the control voltage Vcont. An overshoot that occurs in the voltage generating unit (2 or 4) at the time of polarity switching mainly depends on a circuit constant, and hence the amount of overshoot is excessive in the case of a low-voltage output even if the amount of overshoot is optimal in the case of a rated output.

Abstract: An output terminal of a positive voltage generating circuit and an output terminal of a negative voltage generating circuit are connected in series, and an output terminal of the negative voltage generating circuit is connected to a ground via a resistor. A switching circuit and a series connection circuit of resistors are connected in parallel to each other between the output terminals of the positive voltage generating circuit and the negative voltage generating circuit. The switching circuit is on-off driven by a voltage signal taken from a junction point between the resistors, and the switching circuit is on-off driven by a voltage signal taken from a junction point between the resistors. Accordingly, when the polarity of an output voltage is switched, electric charges accumulated up to that point are discharged through the switching circuit of a voltage OFF-side polarity, so that the voltage quickly falls.