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BARC

QUADRUPOLE MASS SPECTROMETER


The Quadrupole Mass Spectrometer is a very versatile analytical instrument capable of compositional analysis of gases and volatile liquids. It consists of an Electron Impact ion source, quadrupole mass analyzer and a detector. The QMS is a compact, reliable and low cost analytical tool which has numerous applications in the industry. It can analyse a mass range of 1-300 amu with a resolution of 1 amu, which is adjustable.

Its applications include Gas compositional analysis from chemical and physical processes, residual gas analysis in Ultra High Vacuum systems, molecular weight and structural identifications in many organic compounds. It can also be coupled to Gas Chromatograph or a liquid Chromatograph for varied analytical problems.


The Quadrupole Mass spectrometer is a very versatile analytical instrument capable of compositional analysis of gases and volatile liquids. This instrument has been developed by BARC as an import substitute.

Features
  1. Compact, reliable and low cost analytical tool.
  2. Electron impact ion source
  3. Rotary & Turbomolecular pump for clean vacuum.
  4. Easy sample introduction
  5. PC based interface & control
  6. Channel electron multiplier detector
Specifications

Quadrupole Mass Analyzer

Rod diameter 16 mm
Rod length 200 mm
Pre-filter/post 24 mm
filter 1.2 MHz
RF frequency 1 amu (adjustable)
Resolution 1-300 amu
Mass range 1x10-4A / torr for N2 on Faraday cup
Sensitivity 1A / torr on CEM

Ion source

Source Electron Impact
Filament material Tungsten wire
Ion Optics Focus, Lens1, Lens2

Vacuum System

Vacuum system Turbo molecular pump (250 l / s)
Roughing pump Rotary pump (5-10 m3 / h)
Sample Introduction System Suitable for gases & volatile liquids.
Single port with controlled leak valve.
Applications
  1. Gas compositional analysis from chemical and physical processes
  2. Residual gas analysis in Ultra High Vacuum systems
  3. Molecular weight and structural identifications in many organic compounds
  4. It can also be coupled to a Gas Chromatograph or a liquid Chromatograph for varied analytical problems

The Quadrupole Mass spectrometer is a very versatile analytical instrument capable of compositional analysis of gases and volatile liquids. This instrument has been developed by BARC as an import substitute.

Features
  1. Compact, reliable and low cost analytical tool.
  2. Electron impact ion source
  3. Rotary & Turbomolecular pump for clean vacuum.
  4. Easy sample introduction
  5. PC based interface & control
  6. Channel electron multiplier detector
Specifications

Quadrupole Mass Analyzer

Rod diameter 16 mm
Rod length 200 mm
Pre-filter/post 24 mm
filter 1.2 MHz
RF frequency 1 amu (adjustable)
Resolution 1-300 amu
Mass range 1x10-4A / torr for N2 on Faraday cup
Sensitivity 1A / torr on CEM

Ion source

Source Electron Impact
Filament material Tungsten wire
Ion Optics Focus, Lens1, Lens2

Vacuum System

Vacuum system Turbo molecular pump (250 l / s)
Roughing pump Rotary pump (5-10 m3 / h)
Sample Introduction System Suitable for gases & volatile liquids.
Single port with controlled leak valve.
Applications
  1. Gas compositional analysis from chemical and physical processes
  2. Residual gas analysis in Ultra High Vacuum systems
  3. Molecular weight and structural identifications in many organic compounds
  4. It can also be coupled to a Gas Chromatograph or a liquid Chromatograph for varied analytical problems

Mechanical Fabrication Workshop with the following facilities

  1. Conventional Lathe Machine
  2. CNC Lathe Machine
  3. Centerless Grinding Machine
  4. Vertical Milling Machine
  5. TIG Welding
  6. Electropolishing
  7. CNC Gig Boring

Facilities for Inspection of mechanical sub - assemblies

  1. Normal Precision Measuring Instruments
  2. 3D-Co-ordinate Measuring Machine (L.C.—1 micron)
  3. MSLD ( Helium Leak Detector ) for Vacuum Testing
    (Leak Rate: 10-12 Torr Litre/sec

Electronics Assembly & Test Facilities

  1. PCB assembly, SMD workbench & Instrument rack wiring facility
  2. Normal measuring instruments like multimeters & 100MHz Oscilloscopes
  3. Function generator ( 1MHz )
  4. 6 & 1/2 Digit Digital Voltmeter or Digital Multimeter
  5. R.F. Digital Voltmeter with attenuator
  6. High Voltage measurement system

SPACE

  1. 150 square feet space is required for assembly, testing & installation of the Quadrupole Mass spectrometer.

POWER

  1. 230 Volts, 5 Ampere & 15 Ampere, Single Phase, 3kVA

MANPOWER

  1. One Electronics diploma engineer for electronic units assembly/maintenance
  2. One Physics graduate/ PG for Vacuum testing & QMS operational testing
  3. One Mechanical and one Electrical Technician

BARC Technologies

Data acquisition and control system in mass spectrometer is used to acquire and control the vital parameters of the system. This hardware module is a standalone option of data acquisition in both analog and pulse counting mode of acquisition used in QMS. The module can be interfaced with PC with a serial port. It can also be used for other data acquisition tasks.


Data acquisition and control system in mass spectrometer is used to acquire and control the vital parameters of the system. Proposed hardware module is a standalone option of data acquisition in both analog and pulse counting mode of acquisition used in QMS. This module also can be used as a general purpose data acquisition module. It has following features:

  1. Modbus protocol over 4 wire RS422 serial link with upto 105Kbps baud rate.
  2. Eight channel of 16 bit 100 KSPS (aggregate) analog inputs.
  3. Two channel of 16 bit ± 10 V analog output.
  4. Two channel of 16 bit ± 5 V analog output for onboard threshold setting.
  5. One Pulse counting input for pulses from -10mV to -4V and width greater than 10 nS
  6. Programmable threshold for the pulse height discrimination.
  7. Digital logic is implemented in the FPGA.
  8. One RS422/485 isolated interface.

BARC Technologies

Quadrupole Mass Spectrometer (QMS) is an extremely versatile analytical instrument with applications in wide areas of science and technology like gas analysis, advanced surface science, plasma characterization etc.

The system sets the instrument parameters and can acquire the instrument data in both analog and pulse counting mode of operation of instrument. Along with normal setting and acquisition through (16bit) DAC and ADC, the hardware also supports for acquisition in pulse counting mode whereby the pulsed of the range -10mv to -4V with the width of greater than 8ns are counted over the settable period of time on the 32bit counter. This feature makes the hardware most suitable for these types of mass spectrometers. This module also can be used as a general purpose data acquisition module. It has following features:

  1. Modbus protocol over 4 wire RS422 serial link with upto 105Kbps baud rate.
  2. Eight channel of 16 bit 100 KSPS (aggregate) analog inputs.
  3. Two channel of 16 bit ± 10 V analog output.
  4. Two channel of 16 bit ± 5 V analog output for onboard threshold setting.
  5. One Pulse counting input for pulses from -10mV to -4V and width greater than 10 nS
  6. Programmable threshold for the pulse height discrimination.
  7. Digital logic is implemented in the FPGA.
  8. One RS422/485 isolated interface.

The data acquisition system is composed of the software and the hardware interface to the instrument whereby the instrument parameters are set, acquired and controlled as per requirement. Proposed data acquisition and control system interfaces PC and instrument as shown in the figure below.

BARC Technologies
APPLICATIONS

The data acquisition system is useful in the Quadrupole Mass Spectrometers developed by BARC. Whereas the standalone data acquisition module (i.e. multifunction module) can be used at various places for analog control and acquisition and specifically for pulse counting operations for the pulses from – 10mv to -4V with width 10ns or more (i.e. to count pulses of CEM, MCP etc.)

MAN POWER

  1. One ITI trained electronics/electrical technician for fabrication, assembly, programming and testing.
  2. One diploma electronics engineer for troubleshooting/repair in case of failures.

ASSEMBLY AND TEST FACILITIES

  1. PCB Fabrication and Assembly SMD Soldering and Rework bench.
  2. Measuring Equipments
    1. 6 1/2 Digits Multimeter.
    2. 100 MHz Oscilloscope.
    3. Function Generator which can generate 10 nS negative pulse(- 10mV to -4V).
    4. Personal Computer with 4 wire RS485/RS422 interface/adapter and a RS232 serial port.
Application Procedure
BARC Technologies
BARC Technologies