Atomic emission characteristics of helium from helium discharge lamp using optical multichannel analyzer

Study on atomic emission characteristics of helium obtained from the helium discharge lamp has been conducted using optical multichannel analyzer, which has wavelength from 300 nm to 800 nm. This study is very urgently necessary to know and confirm the purity of atomic emission from the discharge lamp, which is now commercially available in the market. In the experiment, a helium discharge lamp was turned on by a high voltage power supply to obtain a discharge plasma. The discharge plasma from the discharge lamp was then send into a multichannel analyzer (OMA) via an optical fiber. Some analytical emission lines with high emission intensity and low background emission are obtained and clearly identified from the OMA system including neutral and ionic He emission lines at 492.2 nm, 501.6 nm, 587.6 nm, 667.8 nm, and 706.5 nm. The technique of OMA system can effectively used to identify elements and to distinguish the impurities from the discharge lamp emission.