Investigation of fuel retention via gas balance on HT-7

An investigation of fuel retention is conducted on HT-7. This paper introduces the time evolution of fuel retention for two consecutive long discharges. The retention on various wall statuses was also studied. It showed that wall statuses have strong influence on the retention.

► The short-term retention reaches saturation at 3.5 s the retention rate increase with lithium limiter the higher retention rate observed after siliconization.