Snake Perturbations during Pellet Injection in the HL-1M Tokamak

摘要

Pellet injection experiments have been widely carried out with various toroidal plasmas, peaked density profile and improved con finement are frequently observed, and some interesting phenomena have also been found.One of them is the long-lived m=1/n=1 oscillation observed on soft X-ray emission and other diagnostics (notably the microwave interferometers and the ECE systems) after pellet injection in JET, JT-60,