AVS 53rd International Symposium
    Plasma Science and Technology Wednesday Sessions
       Session PS2-WeA

Paper PS2-WeA8
Development of Multi-Micro Hollow Cathode Lamp with Metallic-Element-Emission Allay

Wednesday, November 15, 2006, 4:20 pm, Room 2011

Session: Atmospheric and Microplasmas
Presenter: T. Ohta, Wakayama University, Japan
Authors: T. Ohta, Wakayama University, Japan
S. Taneda, Wakayama University, Japan
M. Ito, Wakayama University, Japan
S. Takashima, Nagoya University, Japan
H. Kano, NU EcoEngineering CO., LTD., Japan
S. Den, Katagiri Engineering CO., LTD., Japan
M. Hori, Nagoya University, Japan
Correspondent: Click to Email
For quantitative analysis of metallic elements, the atomic absorption spectrometry has been widely used. The development of the compact light source, which emits simultaneous multi-atomic lines for the analysis, is required, since the analysis should be performed quickly on-site in the environmental field. Therefore, we developed the multi-light source using micro hollow cathode discharge. Micro hollow cathode discharge can be stably generated in high-pressure without an arc discharge, which destroys the devices. The four Cu pipes attached with metallic wires, which are Fe, Mo, and Brass respectively, were used as a cathode. The inside diameter of Cu pipe was 0.7 mm. The Cu mesh as an anode was set at the distance of 160?m from the cathode. The discharge was generated by using helium as a working gas at the pressure of 0.02 MPa, the current of 71 mA, and the discharge voltage of 320 V. The emissions of four metallic elements from the each pipe were simultaneously obtained. The analysis line of Cu (324.74 nm), Zn (213.86 nm), and Fe (344.06 nm), and resonance line of Mo (379.83 nm) were observed. The emission intensities of metallic elements increase with a decrease in the pressure. The pD, where p is a pressure and D is a cathode hole diameter, was 1.1 Torr cm and the discharge was stably generated with hollow cathode effect. The multi-light source using micro hollow cathode discharge was successfully developed. The multi-micro hollow cathode discharge would open the window to analyze the various metallic elements simultaneously by changing the wire elements.