| 摘要 |
Discharge ionizing detector with a discharge chamber (14), a discharge source (30) placed in the discharge chamber to discharge in a discharge zone to produce ionization components to be analyzed in the chamber, means (22) of introducing a gas flow into the chamber and means (68) of extracting the ionized contaminants present in the chamber. The means of extraction is placed near the discharge zone. An ionization chamber is attached to the discharge chamber, a flow guide directs the gas discharge flow from the discharge chamber to the adjacent ionization chamber, means of extraction empty the discharge chamber of ionized contaminants, there are means of introducing a sample flow of gas containing a gas to be analyzed into the ionization chamber and means of discharging the sample gas mixture and the discharge gas from the ionization chamber. An inlet in the extraction flow is designed to attract ionized contaminants from the discharge zone. A discharge cathode tube (30) and bore (26) in the cathode allows the extraction flow from the end (30T) of the discharge cathode, where the end of the cathode is next to the discharge. An annular restriction (68) is placed in the extraction flow near the cathode to direct a flow of ionized contaminants towards the inlet in the extraction flow. The detector body (12) defines a first, discharge chamber (14) and a second, ionizing chamber. These chambers are coaxial and have a common internal wall to guide the flow containing a number of parallel bores (24) close together. Each bore includes inlet and outlet openings. |
