Effect of bias on trapping probes and bolometers for tokamak edge diagnosis

Analysis is presented for the particle and energy flow to an electrically biasable probe immersed in the magnetic field of the boundary plasma of a tokamak or other magnetic confinement device. The analysis is appropriate to the operation of the probe in the voltage-current (Langmuir) probe mode, the thermal power (bolometer) mode, hydrogenic ion trapping mode or impurity deposition mode. The formulation of the analysis permits the use of any cross-field diffusion model i.e. classical, semi-classical, empirical. (author)