Performance of the new monomode 10 GHz ECR radiation source ELISA

A new vacuum-ultraviolet radiation source based on an electron cyclotron resonance plasma was developed. Electron Cyclotron Resonance Light Source Assembly (ELISA) is a 10 GHz monomode source of a compact design featuring a tunable cavity and axially positionable permanent magnets. The radiation emission of the source can be detected simultaneously in the vacuum-ultraviolet (VUV) spectral range via a toroidal grating monochromator from 5 to 105 nm and in the X-ray spectral range via a Si(Li) detector. Systematic investigations of the microwave characteristics of ELISA and of the radiation emission of a krypton plasma were performed at a low absorbed microwave power of about 13 W. The dependence on the cavity tuning, on the magnet position and on pressure is presented.