Overview and recent progress of KSTAR diagnostics

Abstract

The 14th experimental campaign from the Korea Superconducting Tokamak Advanced Research (KSTAR) device has passed since the first experimental campaign was carried out in 2008. The basic diagnostic systems such as magnetic diagnostics, interferometer, inspection illuminator, visible spectrometer, ECE radiometer have been used for the first plasma experiment in KSTAR. Currently more than 50 diagnostic systems have been continuously installed including improved basic diagnostics and advanced imaging diagnostics in KSTAR. A recent progress and future plan of diagnostics for KSTAR are briefly discussed.

Development of Directional 14 MeV-Fusion Neutron Detector Using Liquid-Scintillator-Filled Capillaries

“…Fi.) detectors, which use plastic scintillators processed into a fiber form, have been used to conduct the time-resolved D-T neutron measurements at TFTR, LHD, JT-60U, and KSTAR [21][22][23][24][25][26][27][28][29][30][31]. This detector offers a high-speed response, radiation resistance, and directional sensitivity to 14 MeV neutrons.…”

“…Therefore, the contamination of signals by high-energy gamma rays is inevitable when using pulse-height discrimination alone. Organic scintillators such as stilbene (solid) and EJ-301 (liquid) have also been used as a D-T neutron detector at LHD [22][23][24][25][26][27][28][29][30][31][32][33] and JT-60U [34,35]. They offer a high counting efficiency and possess a PSD capability, enabling the differentiation of pulses originating from interactions between neutrons and gamma rays.…”