Edge plasma characteristics were studied by a fast-scanning 4-probe array and aMach/Reynolds stress/Langmuir 10-probe movable array in the boundary region.These probescould measure the edge plasma temperature,density,poloidal electric field,radial electric field,Reynolds stress,poloidal rotation velocities and their profiles,which could be obtained by changingthe radial positions of the probe array shot by shot.The measured results were used to analyseplasma confinement,turbulent fluctuations and correlations.The fixed flush 3-probe arrays weremounted on the 4-divertor neutralization plates at the same toroidal cross-section in the divertorchamber.These probes were used to measure the profiles of the electron temperature,density andfloat potential in the divertor chamber.Edge plasma behaviours in both limiter configuration anddivertor configuration are compared.The decay lengths of the edge temperature and density weremeasured and is emphasized for plasma behaviours of the supersonic molecular beam injectionand lower hybrid current drive.The dependence of the radial gradient of Reynolds stress on thepoloidal flow and the radial gradient of the electric field on turbulent loss are discussed.
