CN114967541B - Electric control system of thermal ionization mass spectrometer - Google Patents
Electric control system of thermal ionization mass spectrometer Download PDFInfo
- Publication number
- CN114967541B CN114967541B CN202210507172.2A CN202210507172A CN114967541B CN 114967541 B CN114967541 B CN 114967541B CN 202210507172 A CN202210507172 A CN 202210507172A CN 114967541 B CN114967541 B CN 114967541B
- Authority
- CN
- China
- Prior art keywords
- power supply
- current
- ion
- module
- electromagnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/022—Circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Electron Tubes For Measurement (AREA)
Abstract
The invention provides an electric control system of a thermal ionization mass spectrometer, which comprises a control computer, an electromagnet power supply unit, an ion current detection unit, an ionizer power supply unit and a high-voltage power supply unit, wherein the electromagnet power supply unit, the ion current detection unit, the ionizer power supply unit and the high-voltage power supply unit are respectively connected with an external power supply and the control computer, the electromagnet power supply unit converts the external power supply into a set current of a mass analysis electromagnet and then supplies the set current to the mass analysis electromagnet, the ion current detection unit measures an ion current received by an ion receiver and transmits the ion current to the control computer, the ionizer power supply unit converts the external power supply into a set current of an ionizer and then supplies the set current to an evaporation zone or an ionization zone of an ion source, and the high-voltage power supply unit converts the external power supply into set currents of electrodes of an ion optical lens and then supplies the set currents to the corresponding electrodes of the ion optical lens. The invention can realize execution control, parameter adjustment, signal acquisition and the like of each unit of the mass spectrometer, realize automatic operation management control of the mass spectrometer, and greatly improve the control precision and the system stability.
Description
Technical Field
The invention particularly relates to an electric control system of a thermal ionization mass spectrometer.
Background
A Thermal Ionization Mass Spectrometry (TIMS) is an analysis and test technology for accurately measuring the isotope abundance and the isotope abundance ratio of elements developed in the 70 th 20 th century, and the principle of the technology is that a sample coated on the surface of a metal strip is heated to be evaporated and ionized, charged ions are introduced into a magnetic field mass analyzer through an ion transmission system, the charged ions are separated according to different mass-to-charge ratios (m/z), ion current is amplified through a detector, and finally the isotope abundance or the abundance ratio of the measured elements is obtained through processing by measurement and control software. Compared with other analysis technologies, the thermal ionization mass spectrometry technology has the advantages of high accuracy, high precision and the like, and the isotope dilution mass spectrometry is an internationally recognized absolute measurement method and is widely applied to the fields of nuclear industry, environment, geology, archaeology and the like. At present, domestic thermal ionization mass spectrometers are still basically in the scientific research prototype stage and do not have commercial production matching capability.
The Thermal Ionization Mass Spectrometer (TIMS) mainly comprises an ion source, a magnetic mass analyzer, a detector, an electric control system, a software system and the like. The electric control system is a main means for realizing effective control of each bottom layer hardware, is an important component of the magnetic mass spectrometer, and directly determines the measurement precision and the control precision of the instrument, and influences key technical indexes such as the sensitivity and the resolution of the instrument.
Disclosure of Invention
The invention aims to solve the technical problem of providing the electric control system of the thermal ionization mass spectrometer with good stability and strong reliability aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problem of the invention is as follows:
the invention provides an electric control system of a thermal ionization mass spectrometer, comprising: a control computer and a power supply module, wherein the power supply module comprises an electromagnet power supply unit, an ion current detection unit, an ionizer power supply unit and a high-voltage power supply unit which are respectively connected with an external power supply,
the control computer is respectively in communication connection with the electromagnet power supply unit, the ion current detection unit, the ionizer unit and the high-voltage stabilizer,
the electromagnet power supply unit is used for converting an external power supply into a quality analysis electromagnet set current according to a quality analysis electromagnet current set instruction sent by the control computer and then providing the quality analysis electromagnet with the quality analysis electromagnet set current,
the ion current detection unit is used for measuring the ion current received by the ion receiver and transmitting the ion current to the control computer,
the ionizer power supply unit is used for converting an external power supply into ionizer set current according to an ionizer current set instruction sent by the control computer and then supplying the ionizer set current to an evaporation zone or an ionization zone of the ion source,
and the high-voltage power supply unit is used for converting an external power supply into the setting current of each electrode of the ion optical lens respectively and then supplying the setting current to the corresponding electrode of the ion optical lens according to the setting command of each electrode of the ion optical lens sent by the control computer.
Optionally, the electromagnet power supply unit comprises an electromagnet power supply module, a shaper and a scanning stabilizer, the external power supply, the electromagnet power supply module, the shaper and the electromagnet coil of the mass analysis electromagnet are sequentially connected, the control computer, the scanning stabilizer and the magnetic induction coil of the mass analysis electromagnet are sequentially connected,
the electromagnet power module is used for converting an external power into adjustable current within the range of 0.2-16A, the shaper is used for carrying out pulse width modulation on the current output by the electromagnet power module so as to form the set current of the quality analysis electromagnet and transmitting the set current to an electromagnet coil of the quality analysis electromagnet,
the scanning stabilizer scans magnetic field current generated by the magnetic induction coil of the mass analysis electromagnet and feeds the magnetic field current back to the control computer, and the control computer is used for adjusting the set current of the mass analysis electromagnet according to the magnetic field current generated by the magnetic induction coil of the mass analysis electromagnet and sending an instruction for adjusting the set current of the mass analysis electromagnet to the shaper through the scanning stabilizer.
Optionally, the ion current detection unit comprises a Faraday cup electrostatic amplification module, a secondary electron multiplier electrostatic amplification module and a voltage-frequency converter,
the control computer is connected with a voltage frequency converter, the voltage frequency converter is respectively connected with a Faraday cup electrostatic amplification module and a secondary electron multiplier electrostatic amplification module, the Faraday cup electrostatic amplification module and the secondary electron multiplier electrostatic amplification module are respectively connected with an ion receiver,
the ion current signal captured by the ion receiver is amplified into a voltage signal through a Faraday cup electrostatic amplification module or a secondary electron multiplier electrostatic amplification module and transmitted to a voltage frequency converter, and the voltage frequency converter converts the voltage signal into a pulse frequency signal and transmits the pulse frequency signal to the control computer.
Optionally, the faraday cup electrostatic amplification module includes a plurality of faraday cup electrostatic amplifiers, the plurality of faraday cup electrostatic amplifiers correspond to the plurality of faraday cups of the ion receiver one by one, and the faraday cup electrostatic amplifiers are connected to the corresponding faraday cups and used for receiving 6.0 × 10 detected by the corresponding faraday cups -14 A～2.7×10 -10 Ion current of A.
Optionally, the secondary electron multiplier electrostatic amplification module includes a plurality of secondary electron multiplier electrostatic amplifiers, the plurality of secondary electron multiplier electrostatic amplifiers correspond to the plurality of secondary electron multipliers of the ion receiver one by one, and the secondary electron multiplier electrostatic amplifiers are connected to the corresponding secondary electron multipliers and are configured to receive the 1.6 × 10 detected by the corresponding secondary electron multipliers -18 A～6.0×10 -14 Ion current of A.
Optionally, the ionizer power supply unit comprises: a current stabilizer, a stepping motor system,
the external power supply is connected, the current stabilizer is connected with an evaporation zone or an ionization zone of the ion source in sequence, the current stabilizer is used for converting the external power supply into adjustable current in the range of 0.1A-7.0A, a linear multi-ring potentiometer is arranged in the current stabilizer,
the control computer, the stepping motor system and the linear multi-ring potentiometer are connected in sequence,
the stepping motor system is used for controlling the linear multi-turn potentiometer to rotate according to an ionizer current setting instruction sent by the control computer, and adjusting the output current of the current stabilizer to be the ionizer setting current.
Optionally, the step motor system comprises a step motor control module and a step motor, the step motor is connected with the linear multi-turn potentiometer, the step motor control module is connected with the control computer through a first I/O controller,
the control computer transmits an instruction set by the current of the ionizer to the stepping motor control module through the first I/O controller, and the stepping motor control module controls the stepping motor to operate so as to drive the linear multi-turn potentiometer to rotate, so that the output current of the current stabilizer is adjusted to be the set current of the ionizer.
Optionally, an auxiliary power supply unit connected with an external power supply and in communication connection with the control computer,
the auxiliary power supply unit is used for converting an external power supply into a set current or voltage of the auxiliary device according to an auxiliary device current or voltage setting instruction sent by the control computer and then supplying the set current or voltage to the corresponding auxiliary device.
Optionally, the auxiliary device includes a secondary electron multiplier, a suppression grid, a magnetic induction coil, a secondary electron multiplier deflector, an ion source deflector, and a sample turntable driving device, and the auxiliary power supply unit correspondingly includes a secondary electron multiplier power module, a suppression grid, a magnetic induction sensor power module, a secondary electron multiplier deflector power module, an ion source deflection power, and a sample turntable driving power module.
Optionally, be equipped with power control panel and UPS uninterrupted power source on the circuit that external power source and power module link to each other, power control panel is used for the power supply management of each submodule piece of power module, UPS uninterrupted power source charges when the circular telegram to provide emergency power source for power module when the outage.
Optionally, the control computer is in communication connection with the power supply module through a USB-CAN communication module, and an a/D converter is arranged between each submodule of the USB-CAN communication module and the power supply module, and is configured to convert a digital communication signal transmitted by the control computer into an analog signal and transmit the analog signal to the corresponding submodule.
The invention can realize the execution control, parameter adjustment, signal acquisition and the like of each unit of the mass spectrometer, realize the automatic operation management control of the mass spectrometer and greatly improve the control precision and the system stability.
Drawings
Fig. 1 is a block diagram of an electric control system of a thermal ionization mass spectrometer provided in embodiment 1 of the present invention;
FIG. 2 is a block diagram of the power supply unit of the electromagnet;
FIG. 3 is a block diagram of an ion current detecting unit;
FIG. 4 is a block diagram of the power supply unit of the ionizer;
fig. 5 is a block diagram of the structure of the auxiliary power supply unit.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "up" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The invention provides an electric control system of a thermal ionization mass spectrometer, comprising: a control computer and a power supply module, wherein the power supply module comprises an electromagnet power supply unit, an ion current detection unit, an ionizer power supply unit and a high-voltage power supply unit which are respectively connected with an external power supply,
the control computer is respectively in communication connection with the electromagnet power supply unit, the ion current detection unit, the ionizer unit and the high-voltage stabilizer,
the electromagnet power supply unit is used for converting an external power supply into a quality analysis electromagnet set current according to a quality analysis electromagnet current set instruction sent by the control computer and then supplying the quality analysis electromagnet with the quality analysis electromagnet set current,
the ion current detection unit is used for measuring the ion current received by the ion receiver and transmitting the ion current to the control computer,
the ionizer power supply unit is used for converting an external power supply into ionizer set current according to an ionizer current set instruction sent by the control computer and then supplying the ionizer set current to an evaporation zone or an ionization zone of the ion source,
and the high-voltage power supply unit is used for converting an external power supply into the setting current of each electrode of the ion optical lens respectively and then supplying the setting current to the corresponding electrode of the ion optical lens according to the setting command of each electrode of the ion optical lens sent by the control computer.
Example 1:
as shown in fig. 1, the present embodiment provides an electric control system for a thermal ionization mass spectrometer, including: a control computer 1 and a power supply module, the power supply module comprises an electromagnet power supply unit 2, an ion current detection unit 3, an ionizer power supply unit 4 and a high voltage power supply unit 5 which are respectively connected with an external power supply,
the control computer 1 is respectively in communication connection with the electromagnet power supply unit 2, the ion current detection unit 3, the ionizer unit and the high voltage stabilizer,
the electromagnet power supply unit 2 is configured to convert an external power source into a set current for the mass analysis electromagnet 100 and supply the set current to the mass analysis electromagnet 100 according to a mass analysis electromagnet 100 current setting instruction sent by the control computer 1,
the ion current detection unit 3 is used for measuring the ion current received by the ion receiver 200, and transmitting the ion current to the control computer 1,
the ionizer power supply unit 4 is used for converting an external power into an ionizer setting current according to an ionizer current setting command sent from the control computer 1 and then supplying the ionizer setting current to the evaporation zone or the ionization zone of the ion source 300,
the high voltage power supply unit 5 is configured to convert the external power into the setting current for each electrode of the ion optical lens according to the setting command for each electrode current of the ion optical lens sent by the control computer 1, and then provide the setting current for the corresponding electrode of the ion optical lens.
From this, can realize execution control, parameter adjustment and signal acquisition etc. to each unit of mass spectrometer, realize the automatic operation management control of mass spectrometer, greatly promote control accuracy and system stability.
In this embodiment, the electromagnet power supply unit 2 includes an electromagnet power supply module 21, a shaper 22, and a scanning stabilizer 23, the external power supply, the electromagnet power supply module 21, the shaper 22, and the electromagnet coil of the quality analysis electromagnet 100 are sequentially connected, the control computer 1, the scanning stabilizer 23, and the magnetic induction coil of the quality analysis electromagnet 100 are sequentially connected,
the electromagnet power module 21 is used for converting an external power into an adjustable current within the range of 0.2-16A, the shaper 22 is used for performing pulse width modulation on the current output by the electromagnet power module 21 to form a set current of the quality analysis electromagnet 100 and transmitting the set current to an electromagnet coil of the quality analysis electromagnet 100,
the scanning stabilizer 23 scans the magnetic field current generated by the magnetic induction coil of the mass analysis electromagnet 100 and feeds back the magnetic field current to the control computer 1, and the control computer 1 is configured to adjust the set current of the mass analysis electromagnet 100 according to the magnetic field current generated by the magnetic induction coil of the mass analysis electromagnet 100 and send an instruction for adjusting the set current of the mass analysis electromagnet 100 to the shaper 22 through the scanning stabilizer 23.
The electromagnet power supply unit 2 is used for supplying a power supply with stable current to the electromagnet coil so as to ensure that a stable magnetic field is generated between the electromagnet coils. The current of the electromagnet coil can be set and adjusted through controlling computer software. The electromagnet power supply unit comprises an electromagnet power supply module, a shaper and a scanning stabilizer, wherein the electromagnet power supply can provide stable and adjustable current for the winding coil within the range of 0.2-16A, and the stability of the electromagnet power supply is better than 50ppm within 30 minutes. The shaper is a unit for adjusting the current of the electromagnet coil. The shaper performs pulse width modulation in a PWM mode, so that the current in the electromagnet coil circuit is adjustable from 0.2A to 16A. The scanning stabilizer is used for stabilizing the strength value of the magnetic field generated by the electromagnet at a given level and measuring the current of the magnetic field induced by the magnetic induction coil according to the instruction of the electronic computer.
In this embodiment, the ion current detection unit 3 includes a faraday cup electrostatic amplification module 31, a secondary electron multiplier electrostatic amplification module 32 and a voltage-to-frequency converter 33,
the control computer 1 is connected with a voltage frequency converter 33, the voltage frequency converter 33 is respectively connected with a Faraday cup electrostatic amplification module 31 and a secondary electron multiplier electrostatic amplification module 32, the Faraday cup electrostatic amplification module 31 and the secondary electron multiplier electrostatic amplification module 32 are respectively connected with an ion receiver 200,
the ion current signal captured by the ion receiver 200 is amplified into a voltage signal by the faraday cup electrostatic amplification module 31 or the secondary electron multiplier electrostatic amplification module 32 and transmitted to the voltage frequency converter 33, and the voltage frequency converter 33 converts the voltage signal into a pulse frequency signal and transmits the pulse frequency signal to the control computer 1.
In this embodiment, the faraday cup electrostatic amplification module 31 includes a plurality of faraday cup electrostatic amplifiers 311, the plurality of faraday cup electrostatic amplifiers 311 correspond to the plurality of faraday cups of the ion receiver 200 one by one, and the faraday cup electrostatic amplifiers 311 are connected to the corresponding faraday cups and are configured to receive 6.0 × 10 detected by the corresponding faraday cups -14 A～2.7×10 -10 Ion current of A.
In this embodiment, the secondary electron multiplier electrostatic amplifying module 32 includes a plurality of secondary electron multiplier electrostatic amplifiers 321, a plurality of secondary electron multiplier electrostatic amplifiers 321 andthe ion receiver 200 has a one-to-one correspondence between a plurality of secondary electron multipliers, and the electrostatic amplifier 321 of each secondary electron multiplier is connected to the corresponding secondary electron multiplier for receiving the 1.6 × 10 detected by the corresponding secondary electron multiplier -18 A～6.0×10 -14 Ion current of A.
The ion current signal captured by each Faraday cup of the ion receiver passes through an electrometer amplifier 10 11 The amplifying resistor of omega amplifies the voltage signal and transmits the voltage signal to the voltage frequency converter. The amplifier circuit of the secondary electron multiplier is similar to the amplifier circuit of an electrometer, and has an amplifying resistance of 10 8 Omega. The voltage-to-frequency converter is designed to convert the voltage signals of the outputs of the electrometer amplifier and the secondary electron multiplier amplifier into a pulse frequency signal, the voltage and frequency values being proportional. After the voltage signal is converted into the pulse frequency signal, the anti-interference performance is stronger in the signal transmission process. The voltage frequency converter is provided with 9-channel voltage frequency conversion modules, the input channel of each module is connected to the output end of the electrometer amplifier, and the voltage frequency conversion modules convert voltage signals into pulse frequency signals in a mode of continuously integrating the input signals. The pulse frequency signal is collected by the input and output controller and then transmitted to the control computer.
In this embodiment, the electrostatic amplifying module 32 of the secondary electron multiplier further includes a pulse amplifier 322, when the secondary electron multiplier works in the ion counting mode, each ion entering the secondary electron multiplier generates a current pulse at the output terminal of the multiplier, and the current pulse signals are amplified by the pulse amplifier 322 and then transmitted to the counting input terminal of the input/output control unit. The amplified pulse width is not less than 40ns, the maximum frequency is not more than 3MHz, and the charge is not less than 10 -14 C。
In this embodiment, the ionizer power supply unit 4 includes: a current stabilizer 41, a stepping motor system,
an external power supply is connected, a current stabilizer 41 is connected with an evaporation zone or an ionization zone of the ion source 300 in sequence, the current stabilizer 41 is used for converting the external power supply into adjustable current within the range of 0.1A-7.0A, a linear multi-loop potentiometer 411 is arranged in the current stabilizer,
the control computer 1, the stepping motor system and the linear multi-turn potentiometer 411 are connected in sequence,
the stepping motor system is used for controlling the linear multi-turn potentiometer 411 to rotate according to an ionizer current setting instruction sent by the control computer 1, and adjusting the output current of the current stabilizer 41 to the ionizer setting current.
In this embodiment, the stepping motor system comprises a stepping motor control module 42 and a stepping motor 43, the stepping motor 43 is connected with the linear multi-turn potentiometer 411, the stepping motor control module 42 is connected with the control computer 1 through a first I/O controller 44,
the control computer 1 transmits the set current command of the ionizer to the stepping motor control module 42 through the first I/O controller 44, and the stepping motor control module 42 controls the stepping motor 43 to rotate so as to drive the linear multi-turn potentiometer 411 to rotate, so that the output current of the current stabilizer 41 is adjusted to the set current of the ionizer.
The ionizer power supply unit 4 is used for providing a power supply for stabilizing current for an ion source evaporation zone (or ionization zone), the ionizer power supply unit 4 is communicated with the control computer 1 through a communication controller of a CAN bus, the current of the ion source evaporation zone (or ionization zone) CAN be adjusted through the control computer 1, and the adjusting range is 0.1-7.0A.
In the embodiment, the device also comprises an auxiliary power supply unit 6, wherein the auxiliary power supply unit 6 is connected with an external power supply and is in communication connection with the control computer 1,
the auxiliary power supply unit 6 is used for converting an external power supply into a set current or voltage of the auxiliary device and then supplying the set current or voltage to the corresponding auxiliary device according to an auxiliary device current or voltage setting instruction sent by the control computer 1.
In this embodiment, the auxiliary device includes a secondary electron multiplier, a suppression grid, a magnetic induction coil, a secondary electron multiplier deflector, an ion source deflector, and a sample turntable driving device, and the auxiliary power supply unit 6 correspondingly includes a secondary electron multiplier power module 61, a suppression grid and magnetic induction sensor power module 62, a secondary electron multiplier deflector power module 63, an ionizer deflection power, and a sample turntable driving power module 64.
The auxiliary power supply unit 6 further includes a second I/O controller 65, and the second I/O controller 65 is used for control and communication of the computer and each power supply module of the auxiliary power supply unit 6. The secondary electron multiplier power supply module 61 is used for providing power supply voltage for the secondary electron multiplier, the output voltage can be set through computer software, and a 16-digit digital-to-analog conversion output port is adopted for voltage adjustment. The grid suppression and magnetic induction sensor power module 62 is used for supplying power to the grid suppression of the ion receiver and the magnetic induction sensor so as to ensure the measurement accuracy of the analysis electromagnet and prevent secondary electrons generated by the impact of scattered ions on the metal surface from falling into the faraday cup and affecting the measurement signal. The secondary electron multiplier deflector power supply module 63 is used to provide an adjustable power supply of 0kV to ± 1.5kV to the ion deflection system. The ion source outlet deflector power supply module supplies power to the deflector at the ion source outlet to correct the point and angle at which the ion beam enters the mass analyzer. The sample turntable driving power supply module is used for supplying power to the sample turntable driving device and ensuring that the sample turntable rotates to change samples according to computer instructions. The mass spectrometer control computer can control the output voltage of each unit and monitor the power supply through the controller of the power supply unit.
In this embodiment, the high voltage power supply unit 5 employs a ± 10kV high voltage stabilizer for providing a stable high voltage power supply for each electrode of the ion optical lens, a reference voltage of the high voltage stabilizer is provided by a standard high voltage module, and the adjustment of voltages on different lens electrode plates is realized by a high voltage adjusting circuit. The high voltage stabilizer is designed with a high voltage switch, when accelerating the voltage switching, all the output voltages of the high voltage stabilizer will be reduced proportionally. The ion transmission efficiency can be optimized by adjusting the voltage between the electrode plates of the ion lens group, and the sensitivity of the instrument is improved. The output voltage parameters of the high voltage power supply unit 5 are shown in table 1.
TABLE 1 output voltage parameter table of high voltage stabilizer
The high-voltage stabilizer has the characteristics that:
1) The high-voltage circuit board and the low-voltage circuit board and the components are arranged and mutually independent but work in cooperation.
2) Important parts and components are provided with active thermostatic regulating devices. The thermostat temperature was 38 ℃. + -. 2 ℃.
3) And a high-voltage insulator is arranged between a high-voltage component of the high-voltage adjusting potentiometer assembly and the stepping motor.
4) The I/O controller and the A/D converter are arranged to ensure that the control computer can monitor the operation of the high-voltage stabilizer in real time and detect the operation state of the high-voltage stabilizer.
In this embodiment, a power control panel 7 and a UPS uninterruptible power supply 8 are disposed on a line connecting an external power supply and a power supply module, the power control panel 7 is used for power supply management of each submodule of the power supply module, and the UPS uninterruptible power supply 8 is charged when powered on, so as to provide an emergency power supply for the power supply module when powered off.
The power control panel 7 is composed of a plurality of power distribution panels, a power switch and the like, the power control panel 7 is mainly used for power supply management of each unit of the instrument, and the power supply mode includes standby power supply, auxiliary equipment power supply and power supply for the main working unit of the instrument through a UPS power supply.
If the external power supply is interrupted suddenly, the UPS 8 can be used for providing an emergency power supply for the surface thermal ionization mass spectrometer control computer and the main execution unit, so that the mass spectrometer equipment is ensured to be normally put into operation, the current detection task is completed, the normal shutdown step is executed, and the damage and data loss to the equipment caused by the sudden power failure are prevented.
In this embodiment, the control computer 1 is in communication connection with the power supply module through the USB-CAN communication module 9, and an a/D converter 10 is disposed between each sub-module of the USB-CAN communication module 9 and the power supply module, and is configured to convert a digital communication signal transmitted by the control computer 1 into an analog signal and transmit the analog signal to the corresponding sub-module.
In addition, the system also comprises a vacuum gauge and an ion pump which are connected with the control computer 1 through an A/D converter 10 and a USB-CAN communication module 9.
The electric control system can be directly used for a Thermal Ionization Mass Spectrometer (TIMS) and can also be used for increasing the electric control system of a multi-receiving inductively coupled plasma mass spectrometer (MC-ICP-MS) controlled by an electrostatic field on the basis.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. An electrical control system for a thermal ionization mass spectrometer, comprising: a control computer (1) and a power supply module, wherein the power supply module comprises an electromagnet power supply unit (2), an ion current detection unit (3), an ionizer power supply unit (4) and a high-voltage power supply unit (5) which are respectively connected with an external power supply,
the control computer (1) is respectively in communication connection with the electromagnet power supply unit (2), the ion current detection unit (3), the ionizer unit and the high-voltage stabilizer,
the electromagnet power supply unit (2) is used for converting an external power supply into a set current of the quality analysis electromagnet (100) and then supplying the set current to the quality analysis electromagnet (100) according to a current setting instruction of the quality analysis electromagnet (100) sent by the control computer (1),
the ion current detection unit (3) is used for measuring the ion current received by the ion receiver (200) and transmitting the ion current to the control computer (1),
the ionizer power supply unit (4) is used for converting an external power supply into an ionizer set current according to an ionizer current set instruction sent by the control computer (1) and then supplying the ionizer set current to an evaporation zone or an ionization zone of the ion source (300),
the high-voltage power supply unit (5) is used for converting an external power supply into the setting current of each electrode of the ion optical lens respectively and then supplying the setting current to the corresponding electrode of the ion optical lens according to the setting command of each electrode of the ion optical lens sent by the control computer (1);
the electromagnet power supply unit (2) comprises an electromagnet power supply module (21), a shaper (22) and a scanning stabilizer (23), the external power supply, the electromagnet power supply module (21), the shaper (22) and the electromagnet coil of the quality analysis electromagnet (100) are sequentially connected, the control computer (1), the scanning stabilizer (23) and the magnetic induction coil of the quality analysis electromagnet (100) are sequentially connected,
the electromagnet power module (21) is used for converting an external power supply into adjustable current within the range of 0.2-16A, the shaper (22) is used for carrying out pulse width modulation on the current output by the electromagnet power module (21) so as to form the set current of the quality analysis electromagnet (100) and transmit the set current to the electromagnet coil of the quality analysis electromagnet (100),
the scanning stabilizer (23) scans the magnetic field current generated by the magnetic induction coil of the mass analysis electromagnet (100) and feeds the magnetic field current back to the control computer (1), and the control computer (1) is used for adjusting the set current of the mass analysis electromagnet (100) according to the magnetic field current generated by the magnetic induction coil of the mass analysis electromagnet (100) and sending an instruction for adjusting the set current of the mass analysis electromagnet (100) to the shaper (22) through the scanning stabilizer (23).
2. The electrodeionization mass spectrometer electrical control system of claim 1, wherein the ion current detection unit (3) comprises a Faraday cup electrostatic amplification module (31), a secondary electron multiplier electrostatic amplification module (32), and a voltage to frequency converter (33),
the control computer (1) is connected with a voltage frequency converter (33), the voltage frequency converter (33) is respectively connected with a Faraday cup electrostatic amplification module (31) and a secondary electron multiplier electrostatic amplification module (32), the Faraday cup electrostatic amplification module (31) and the secondary electron multiplier electrostatic amplification module (32) are respectively connected with an ion receiver (200),
the ion current signal captured by the ion receiver (200) is amplified into a voltage signal through a Faraday cup electrostatic amplification module (31) or a secondary electron multiplier electrostatic amplification module (32) and transmitted to a voltage frequency converter (33), and the voltage frequency converter (33) converts the voltage signal into a pulse frequency signal and transmits the pulse frequency signal to the control computer (1).
3. The electrodeionization mass spectrometer electrical control system of claim 2,
the Faraday cup electrostatic amplification module (31) comprises a plurality of Faraday cup electrostatic amplifiers (311), the plurality of Faraday cup electrostatic amplifiers (311) correspond to the plurality of Faraday cups of the ion receiver (200) one by one, and the Faraday cup electrostatic amplifiers (311) are connected with the corresponding Faraday cups and are used for receiving 6.0 x 10 detected by the corresponding Faraday cups -14 A～2.7×10 -10 Ion current of A.
4. The electrodeionization mass spectrometer electrical system of claim 2,
the secondary electron multiplier electrostatic amplification module (32) comprises a plurality of secondary electron multiplier electrostatic amplifiers (321), the plurality of secondary electron multiplier electrostatic amplifiers (321) correspond to the plurality of secondary electron multipliers of the ion receiver (200) one by one, and the secondary electron multiplier electrostatic amplifiers (321) are connected with the corresponding secondary electron multipliers and used for receiving the 1.6 multiplied by 10 detected by the corresponding secondary electron multipliers -18 A～6.0×10 -14 Ion current of A.
5. The electrodeionization mass spectrometer electrical system of claim 1, wherein the ionizer power unit (4) comprises: a current stabilizer (41), a stepping motor system,
the external power supply is connected, the current stabilizer (41) is connected with an evaporation zone or an ionization zone of the ion source (300) in sequence, the current stabilizer (41) is used for converting the external power supply into adjustable current within the range of 0.1A-7.0A, a linear multi-loop potentiometer (411) is arranged in the current stabilizer,
the control computer (1), the stepping motor system and the linear multi-turn potentiometer (411) are connected in sequence,
the stepping motor system is used for controlling the linear multi-turn potentiometer (411) to rotate according to an ionizer current setting instruction sent by the control computer (1), and adjusting the output current of the current stabilizer (41) to be the ionizer setting current.
6. The electrodeionization mass spectrometer electrical system of claim 5, wherein the stepper motor system comprises a stepper motor control module (42) and a stepper motor (43), the stepper motor (43) being connected to a linear multi-turn potentiometer (411), the stepper motor control module (42) being connected to the control computer (1) through a first I/O controller (44),
the control computer (1) transmits an ionizer current setting instruction to the stepping motor control module (42) through the first I/O controller (44), and the stepping motor control module (42) controls the stepping motor (43) to operate so as to drive the linear multi-turn potentiometer (411) to rotate, so that the output current of the current stabilizer (41) is adjusted to the ionizer setting current.
7. The electrodeionization mass spectrometer electrical control system of claim 1, further comprising an auxiliary power supply unit (6), said auxiliary power supply unit (6) being connected to an external power source and being communicatively connected to said control computer (1),
the auxiliary power supply unit (6) is used for converting an external power supply into a set current or voltage of the auxiliary device and then supplying the set current or voltage to the corresponding auxiliary device according to an auxiliary device current or voltage setting instruction sent by the control computer (1).
8. The electrodeionization mass spectrometer electrical control system of claim 7, wherein the auxiliary devices comprise a secondary electron multiplier, a suppressor grid, a magnetic induction coil, a secondary electron multiplier deflector, an ion source deflector and a sample carousel drive, and the auxiliary power supply unit (6) comprises a secondary electron multiplier power supply module (61), a suppressor grid and magnetic induction sensor power supply module (62), a secondary electron multiplier deflector power supply module (63), an ionizer deflection power supply and a sample carousel drive power supply module (64), respectively.
9. The electric control system of the thermal ionization mass spectrometer according to any one of claims 1-8, characterized in that a power control panel (7) and a UPS (uninterrupted power supply) are arranged on the line connecting the external power supply and the power supply module, the power control panel (7) is used for power supply management of each submodule of the power supply module, and the UPS (uninterrupted power supply) is charged when being powered on so as to provide emergency power supply for the power supply module when being powered off.
10. The system according to any one of claims 1 to 8, wherein the control computer (1) is connected with the power supply module in a communication way through a USB-CAN communication module (9), and an A/D converter (10) is arranged between each submodule of the USB-CAN communication module (9) and the power supply module and used for converting digital communication signals transmitted by the control computer (1) into analog signals and transmitting the analog signals to the corresponding submodule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210507172.2A CN114967541B (en) | 2022-05-10 | 2022-05-10 | Electric control system of thermal ionization mass spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210507172.2A CN114967541B (en) | 2022-05-10 | 2022-05-10 | Electric control system of thermal ionization mass spectrometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114967541A CN114967541A (en) | 2022-08-30 |
| CN114967541B true CN114967541B (en) | 2022-11-29 |
Family
ID=82981793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210507172.2A Active CN114967541B (en) | 2022-05-10 | 2022-05-10 | Electric control system of thermal ionization mass spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114967541B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885414A (en) * | 2014-03-19 | 2014-06-25 | 上海理工大学 | Distributed PID control magnetic levitation ball system based on CAN bus |
| CN104409311B (en) * | 2014-11-18 | 2016-08-17 | 钢研纳克检测技术有限公司 | A kind of for mass spectrometric lens current supply |
| CN107615890A (en) * | 2015-05-11 | 2018-01-19 | 株式会社荏原制作所 | Electromagnet apparatus, electromagnet control device, electromagnet control method and electromagnet system |
| CN207367917U (en) * | 2017-11-13 | 2018-05-15 | 江苏天瑞仪器股份有限公司 | A kind of icp ms vacuum lens electric power system |
| CN107768227A (en) * | 2017-11-13 | 2018-03-06 | 江苏天瑞仪器股份有限公司 | A kind of icp mses vacuum lens electric power system |
| CN109390207B (en) * | 2018-10-23 | 2021-03-26 | 中国工程物理研究院材料研究所 | Mass analyzer system with variable mass dispersion using permanent magnets |
| CN112683983B (en) * | 2020-12-03 | 2023-06-30 | 中国核电工程有限公司 | Sealed mass spectrometer |
-
2022
- 2022-05-10 CN CN202210507172.2A patent/CN114967541B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| "磁质谱的发展及应用进展";张兆清 等;《化学分析计量》;20220228;第31卷(第2期);第94-100页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114967541A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Simpson | High resolution, low energy electron spectrometer | |
| Mous et al. | The novel ultrastable HVEE 3.5 MV Singletron™ accelerator for nanoprobe applications | |
| US11380533B2 (en) | Analyzer apparatus and control method | |
| JPS6255264B2 (en) | ||
| EP0117717B1 (en) | Improvements in operating quadrupole mass spectrometers in the broadband "rf only" mode | |
| US4292519A (en) | Device for contact-free potential measurements | |
| US9583324B2 (en) | High-voltage power unit and mass spectrometer using the power unit | |
| CN109031075A (en) | A kind of multi-thread core insulation automatic tester and system | |
| Edelberg et al. | Compact floating ion energy analyzer for measuring energy distributions of ions bombarding radio-frequency biased electrode surfaces | |
| CN114967541B (en) | Electric control system of thermal ionization mass spectrometer | |
| CN217904246U (en) | High-voltage power supply device of electron gun | |
| JPH0234151B2 (en) | ||
| JP3109245B2 (en) | Tandem ion accelerator | |
| EP1649487B1 (en) | Device for measuring and quantitative profiling of charged particle beams | |
| CN204013238U (en) | Controllable high-voltage AC power | |
| Huang et al. | Beam-based offset calibration of the PLS BPM | |
| JPH08273587A (en) | High frequency induction coupling plasma mass spectrometer | |
| JPH04337297A (en) | Radioactive-ray generator | |
| Fischer et al. | Measurements made in the SPS with a Rest Gas Profile Monitor by collecting Electrons | |
| Hazewindus et al. | The axial injection system of the SIN injector cyclotron: II. Description and experiments | |
| CN111404505A (en) | Voltage amplifier device for space low-energy plasma detector | |
| Chung et al. | Performance of the beam position monitor for the Advanced Photon Source | |
| KR20070071782A (en) | The current and voltage measurement method of using a hall sensor in electron gun sub-power | |
| CN115932933A (en) | Charged particle beam flow measuring device | |
| JPH08273895A (en) | Acceleration for ion beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |