Publications by authors named "Seongmoo Yang"
A tokamak relies on the axisymmetric magnetic fields to confine fusion plasmas and aims to deliver sustainable and clean energy. However, misalignments arise inevitably in the tokamak construction, leading to small asymmetries in the magnetic field known as error fields (EFs). The EFs have been a major concern in the tokamak approaches because small EFs, even less than 0.
View Article and Find Full Text PDFA tokamak, a torus-shaped nuclear fusion device, needs an electric current in the plasma to produce magnetic field in the poloidal direction for confining fusion plasmas. Plasma current is conventionally generated by electromagnetic induction. However, for a steady-state fusion reactor, minimizing the inductive current is essential to extend the tokamak operating duration.
View Article and Find Full Text PDFArticle Synopsis
- The study measures electron density profiles in spherical torus plasmas using a hydrogen line intensity ratio method, facilitating enhanced data collection.
- A specialized fast-frame visible camera captures Balmer line intensities at a rate of 1000 frames per second with a spatial resolution of about 0.5 cm, allowing simultaneous imaging of H and H radiation.
- Initial results show the obtained electron density profile aligns reasonably well with measurements from a triple Langmuir probe, indicating the reliability of the technique.