Possibility of graphite elements usage in submillimeter plasma diagnostics on fusion devices

摘要

The paper presents the results of the active elements conventional characteristics (mirrors and waveguides) made of the graphite materials of the submillimeter laser diagnostics. The reflection coefficients from the graphite ''mirrors'' are 80-90 %, the laser beam transmission coefficients on the supersized graphite waveguides are some percents less than those for the widely used quarts waveguides. On the other side, the penetration coefficients of the diagnostic ports, covered with carbon film are essentially higher in the submillimeter region than in the IR and optical ranges. 24 refs., 2 tab., 5 figs. (Atomindex citation 26:061958)