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Comparison of Hydrogen and Deuterium Plasmas in ECH Start-Up Experiment in the TST-2 Spherical Tokamak
Plasma and Fusion Research
In the TST-2 spherical tokamak, non-inductive start-up experiment using electron cyclotron heating (ECH) at 2.45 GHz are performed. Hydrogen and deuterium discharges were compared after sufficient wall cleaning by Ohmic discharges to ensure discharge reproducibility. After the wall cleaning, wall recycling seemed to be reduced, because additional gas puffing was necessary to sustain a discharge. Even in that case, hydrogen emission measurement revealed the existence of finite wall recyclingdoi:10.1585/pfr.5.s2032 fatcat:m3l43d4hebaudgtlb3mwg6nyiy