Abstract

The time-domain triple-probe method (TDTP) switches Langmuir probe states at high speeds to gather triple-probe information thereby avoiding errors which result when implementing the triple-probe method with spatially separated single state probes in an inhomogeneous plasma. Successful implementation of the TDTP method requires a switching frequency greater than the turbulence bandwidth so that aliased power does not degrade time interpolated estimates of triple-probe states. Additionally, transients between states, largely determined by the ratio of ion saturation current to probe capacitance, must be short enough to establish a probe–plasma equilibrium. These requirements have been met in the edge plasma and parts of the scrape-off layer on the Texas Experimental Tokamak Upgrade. Temperature fluctuations have been measured at two poloidally separated probes. Cross-phase and coherence spectra consistent with those of floating potential fluctuations and ion saturation current fluctuations are measured.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.