Abstract:
A helium resonance lamp having a hollow cylindrical body including dielectric walls has a reentrant coaxial hollow element integral within said body and extending from one end thereof with an electrical conductor within said hollow element. A window partially transparent to 584A encloses the other end of said body. A hollow arm is integral with and extends from the body and contains a getter. High purity helium is maintained within the body at a pressure of 0.1 to 100 torr. The lamp is placed within a chamber connected to a vacuum system to be tested. Helium gas is sprayed near the suspected leak in the system. Helium entering the chamber from the system is detected and displayed.
Abstract:
A device for spectroscopic measurement of a gas composition wherein a helium resonance lamp includes a window partially transparent to radiation at 584A which is emitted by said lamp, the window being within a chamber. The gas to be sampled is mixed with He and placed in the chamber and the lamp is excited. Spectral radiation from the chamber is viewed and analyzed through an observation window.
Abstract:
An ion mobility mass spectrometer for helium doped gases including a helium resonance lamp having an emission at 584A and a window in the lamp partially transparent to radiation at 584A. The window is contained within a channel through which the gases pass. A collector plate is placed opposite the window in the channel and means are provided for maintaining the window at a negative potential relative to the collector plate. When the lamp is excited by an RF source electrons and negative ion are collected on the exterior of the window and the positive ions travel to the collector plate. A monitoring device is connected to the collector plate.