Abstract
Quantitative radial profiles have been determined for deuterium and heavy impurities ( A ⩾ 12) trapped on deposition probes in the plasma edge of ISX-B. Silicon samples were exposed to 1, 4 and 12 tokamak discharges at distances of 10 to 50 mm behind the limiter radius for both ohmic and beam-heated plasmas. The species, quantities and saturation behavior of the principal impurities were determined by ion backscattering and channeling analysis, while nuclear reaction D( 3He, p) 4He and damage analyses were used for the detection and depth profiling of deuterium. The components of stainless steel (Fe, Cr, Ni) were found to increase linearly with the number of discharges, while radial profiles for oxygen and D showed saturation effects in a single discharge. Estimates of D energies and both impurity and D fluxes in the plasma-edge are given for ohmically heated and 350 kW neutral beam injected discharges.
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 callDisclaimer: 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.
