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Fast camera studies at an electron cyclotron resonance table plasma generator.
1Institute for Nuclear Research (ATOMKI), H-4026 Debrecen, Bem tér 18/c, Hungary.
The Review of Scientific Instruments
|March 6, 2014
Summary
This study details a simplified Electron Cyclotron Resonance (ECR) plasma generator. Researchers investigated pulsed ECR plasma dynamics using fast imaging and ion current measurements to understand transient processes.
Area of Science:
- Plasma Physics
- Atomic and Molecular Physics
- Accelerator Technology
Background:
- A simplified table-top Electron Cyclotron Resonance (ECR) plasma generator was developed at ATOMKI.
- This device, a simplified version of the 14 GHz ATOMKI-ECRIS, operates without an axial magnetic trap or particle extraction.
- Radial plasma confinement is achieved using a NdFeB hexapole.
Purpose of the Study:
- To investigate the time evolution of ECR plasma in pulsed radiofrequency (RF) mode.
- To correlate visible light emissions with cold electron distribution during transient plasma states.
- To compare time-resolved ion current measurements with visible light observations.
Main Methods:
- Operation of a table-top ECR plasma generator in pulsed RF mode.
- High-speed camera imaging of visible light emission with 1 ms temporal resolution.
- Measurement of time-resolved ion current on a shaped electrode.
Main Results:
- Visible light emission patterns correlate with the spatial distribution of cold electrons.
- Transient processes after plasma breakdown and glow were analyzed.
- Plasma response was observed by varying gas pressure and microwave power.
Conclusions:
- The study provides insights into the transient dynamics of ECR plasmas.
- Correlations between optical diagnostics and ion current measurements were established.
- This simplified ECR setup serves as a platform for future plasma diagnostics development.
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