Publications by authors named "Yue-jiang Shi"
Triton burnup measurements in KSTAR using a neutron activation system.
Rev Sci Instrum
November 2016
Measurements of the time-integrated triton burnup for deuterium plasma in Korea Superconducting Tokamak Advanced Research (KSTAR) have been performed following the simultaneous detection of the d-d and d-t neutrons. The d-d neutrons were measured using a He proportional counter, fission chamber, and activated indium sample, whereas the d-t neutrons were detected using activated silicon and copper samples. The triton burnup ratio from KSTAR discharges is found to be in the range 0.
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- 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.
[EUV flat field grating spectrometer and performance measurement].
Guang Pu Xue Yu Guang Pu Fen Xi
August 2012
A high-resolution extreme ultraviolet (EUV) spectrometer has been developed to diagnose the magnetically confined plasmas. A holographic spherical varied line spacing concave grating which provides a flat focal plane is used as the diffraction element working with the grazing incidence angle of 3 degrees. The nominal groove density is 1200 lines x mm(-1).
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