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 Russian version |
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Address
196084, St.-Petersburg
Parkovaya str. 4
| ICQ:
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| т/ф: (812) | 388-3814 388-7924 388-3433 |
Magneto Mass-spectrometer
Basic characteristics
| Parametres | Magneto mass-spectrometer |
| Resolution | 300 |
| HWD | 430*150*180 mm |
| Mass | 6 kg |
| Time required for analysis | 1 aem/sec |
Range of measurements of the volume fraction of components
| Hydrogen | 0.2 */100 |
| Carbon monoxide | 0.2*/100 |
| Nitrogen | 0.2*/100 |
| Oxygen | 0.2*/100 |
| Argon | 0.2*/100 |
| Carbon dioxide | 0.2*/100 |
| Methane | 0.2*/100 |
| Ethane | 0.2*/100 |
| Propane | 0.2*/100 |
| Helium | 0.2*/100 |
| Sulphur dioxide | 0.2*/100 |
| Sulphuretted hydrogen | 0.2*/100 |
The principle of operation of magnetic statistical mass-spectrometers is based on spatial division of ions of different masses, in their motion in a homogeneous magnetic field.
1 – ionic source; 1a – cathode; 2 - ; 3 – magnetic separator; 4 - detector
In magnetic static mass-analyzers constant magnetic and electric fields are used. You can see the scheme of mass-analyzers in the figure. Such mass-analyzers possess properties of double focusing and provides resolution (100-500) even at the small sizes of the device. A source of electrons is a straight line cathode (1a.) Electrons, being accelerated up to energy (20-90) eV, ionize neutral molecules of gas test in an ionic source (1). When leaving the source ions are accelerated. Ions are divided by their masses in a homogeneous magnet field (3) which provides the resolution of mass-analyzer together with the electrostatic cylindrical energy analyzer (2). The rimer occurs due to the change of ionic energy in an ionic source. An electronic multiplier is used as a detector.
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