There are a number of pressing problems mankind is facing today that could, at least in part,
be resolved by space systems. These include capabilities for fast and far-reaching …

In this paper, the effect of mixing of argon and oxygen gas on the mode transition and
negative ion production in the helicon discharge is investigated. In the source chamber of …

Oxygen (O 2) helicon plasmas in multiple wave modes were excited by a right-helical
antenna with an upper metal endplate at low pressure. Mode transitions were observed at …

This paper reports the study of the effects of an externally applied magnetic field (0–300 G),
in the mode transition as well as in the radial and axial variation of different plasma …

In this work, different plasma parameters, such as electron density, temperature, and
negative ion density are measured in both the source and expansion chamber of the …

The influence of the magnetic field configuration on the performance of a helicon-based
negative ion source is investigated with simulation experiments. Using COMSOL …

This dissertation is a synopsis of research publications on phenomenology and applications
of 3D plasma-sheath-lenses. It is demonstrated that the sheath surrounding electrodes …

In this study, the influence of the position of a magnetic filter on electron temperature and
hence on the negative ion density in helicon oxygen discharge is investigated. This study is …

A helicon plasma source (HeliPS) experimental set-up is developed to perform experiments
in electronegative gases. Characterization of HeliPS is done in argon and oxygen discharge …

Negative ion rich multicomponent plasma is produced in a novel plasma device for sheath
studies. The experimental volume is composed of low electron temperature (T e∼ 0.2− 0.4 …