Plasmaspec

Pulsed plasma in partial vacuum is characterised, by analysing line intensity ratios to determine its temperature and density. The following can be explored:

• Passive spectroscopy
• Active absorption spectroscopy with a laser
• Measuring plasma frequency
• EM wave propagation in plasma

Team members

• Park Kun Hee
• Yang Jincheng
• Qin Jingwen

(Reach us if you want to join.)

Idea

In this project, a quiescent Argon plasma is produced in a vacuum by a high-voltage DC source. A spectrometer is used to obtain spectral line ratios of different transitions, through a view port. Dependence of plasma characteristics (temperature, density, frequency, etc.) on parameters such as voltage and pressure is explored.

Setup

Logistics

☐ Vacuum pump and vacuum parts

☐ Pirani gauge

☐ Can of Argon gas

☐ Electrodes

☐ Thermometer: to measure the temperature of the cathode

☐ Glass tube and glass slides

☑ High-voltage DC source: using 300 VDC for now

☐ Resistor