Development of a particle injection system for impurity transport study in KSTAR
H Y Lee1, Suk-Ho Hong2, Joohwan Hong1
1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701, Republic of Korea.
The Review of Scientific Instruments
|November 29, 2014
Summary
A new solid particle injection system for KSTAR achieves a 10 cm flight distance with low particle loss. This system will inject impurities like tungsten and carbon to study plasma transport.
Area of Science:
- Plasma physics
- Fusion energy research
- Materials science
Background:
- KSTAR (Korea Superconducting Tokamak Advanced Research) requires precise control over impurity injection for plasma studies.
- Existing injection systems may lack the required precision or compatibility with KSTAR's operational environment.
Purpose of the Study:
- To develop and validate a compact solid particle injection system for KSTAR.
- To enable the study of impurity transport in fusion plasmas using precisely injected particles.
Main Methods:
- Design and construction of a compact injection system with magnetic field and vacuum compatibility.
- Achieving a target flight distance of 10 cm with less than 10% particle loss.
- Injection of solid impurity particles (tungsten, carbon) at the KSTAR midplane.
Main Results:
- Successful development of a compact solid particle injection system.
- Demonstrated achievement of the target 10 cm flight distance with a particle loss rate below 10%.
- System validated for compatibility with KSTAR's strong magnetic field and high vacuum.
Conclusions:
- The developed solid particle injection system is suitable for KSTAR experiments.
- The system will facilitate detailed studies of impurity transport phenomena in fusion plasmas.
- This technology aids in understanding and controlling plasma behavior for future fusion reactors.
