Scaling of Incremental Energy Confinement Time of L-Mode Plasma and Comments on Improved Confinement in Tokamaks

摘要

Incremental energy confinement time defined by tau/sub E//sup ad/ = delta W/sub p// delta P/sub t/ is reviewed for L-mode plasmas in various tokamaks with various heating methods where delta W/sub p/ is incremental plasma energy with increase of heating power delta P/sub t/. It is shown that tau/sub E//sup ad/ -- 0.12a/sub p/ sup 2 s and tau/sub E//sup ad/ is almost independent of other plasma parameters, heating power and heating methods where a/sub p/ is a plasma minor radius in m and a/sub p/ = 0.1 - 1.15 m. In an optimum H-mode plasma, the incremental energy confinement time is improved by a factor of 4 but the scaling is not clear because of lack of data. (ERA citation 12:040159)