We review two classes of plasma diagnostic techniques used in thermal-barrier tandem-mirror fusion experiments. The emphasis of the first class is to study mirror-trapped electrons at the thermal-barrier location. The focus of the second class is to measure the spatial and temporal behavior of the plasma space potential at various axial locations. The design and operation of the instruments in these two categories are discussed and data that are representative of their performance is presented.
DOE contract number: W-7405-ENG-48 OSTI Identifier 7153217 Research organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States).