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Transport of fast electrons in lower hybrid current drive plasmas in the HT-7 tokamak

The transport of fast electrons in lower hybrid current drive (LHCD) plasmas in the HT-7 tokamak was investigated in this work. The evolution of fast electron bremsstrahlung emission profiles after switching off the lower hybrid power was analyzed. We found that the dynamics of the fast electrons is governed by the slowing-down process, and the current density profile can be controlled by LHCD in the HT-7 tokamak.