Methods of direct measurement of the plasma potential and their significance for characterizing the scrape-off layer plasma in fusion devices are briefly discussed. Stress is given to description of the ball-pen probe and its use for plasma potential determination in a broad range of magnetized plasmas.
Methods of direct measurement of the plasma potential and their significance for characterizing the scrape-off layer plasma in fusion devices are briefly discussed. Stress is given to description of the ball-pen probe and its use for plasma potential determination in a broad range of magnetized plasmas. (en)