An ion mobility spectrometer without an ion shutter using a fast pulsed electron source
An ion mobility spectrometer and electron source technology, which is applied in the field of analytical instruments and detection, can solve problems such as complex structure, and achieve the effects of optimizing geometric configuration, simplifying structure and circuit, and high electron intensity
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[0016] Such as figure 1 It is a schematic diagram of the present invention, mainly including a filament 1, an extraction grid 2, an accelerating electrode 3, an exhaust port 4, a group of ring electrodes 5, a carrier gas inlet 6, a Faraday detector 7, a gas to be measured inlet 8, and a silicon nitride film 9. Glass tube 10, electrode 11, accelerating voltage source 12, ionization voltage source 13, drift voltage source 14, drift tube 15, ring electrode 16, said drift tube 15 includes ionization region 17 and drift region 18, said The ionization region 17 is located between the gas inlet 8 to be measured and the ring electrode 16, the drift region 18 is located between the ring electrode 16 and the Faraday detector 7, the filament 1, the extraction grid 2. Accelerating electrode 3, silicon nitride film 9, glass tube 10, electrode 11, and accelerating voltage source 12 form a non-radioactive electron source with a pulse working mode, and the electron emission current can range ...
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