| 摘要 |
<p>A gas discharge tube is provided for use in a detector of the type capable of identifying ionizable species in a carrier gas. The tube contains an inert gas at reduced pressure and the gas is excited by an external circuit including a coil about the tube. The circuit generates a radio frequency which excites the gas and emits ultraviolet radiation. This radiation passes through a transversely located window at the end of the tube for ionizing the species in a chamber. The radiation is at a level of radiative flux which is substantially uniform over the entire area of the window. Electrodes are also described for use in association with the chamber to sense ionization. These electrodes form part of a sensing circuit.</p> |
