New Electrodeless Light Source Intensified by Electron Cyclotron Resonance Heating

Brighter and electrodeless light sources are developed by introducing the electron cyclotron resonance (ECR) effect into the discharge area. In the present proof-of-principle demonstration, a microwave source with a frequency of 2.45 GHz, and a maximum power of 1 kW is used. A mercury lamp placed inside the microwave cavity is immersed in a uniform magnetic field, B. At B = 875 G, which satisfies the ECR condition, the light intensity is increased by 28% at an incident microwave power of 800 W. Short-wavelength components are effectively improved relative to long ones.