Discharge Generation of Atomic Iodine for a COIL

Abstract : This report results from a contract tasking Institute of Physics Academy of Science as follows: B. TECHNICAL PROPOSAL: Tasks and objectives for 24 months To conceptualize the problem based on the comprehensive literature study, theoretical estimation of particular problems, calculations, and elaboration of generator concept, including: estimations of advantages and disadvantages of considered precursors of atomic iodine(l2, CH3l, CF3l and HI, respectively); estimations of advantages and disadvantages of considered type of electric discharge(RF, MW, DC discharge), and discharge configuration employed; estimations of appropriateness of gases used for a discharge ignition and carrying gaseous iodine precursors (Ar, He, N2, addition NO, NO2) from the point of reaction kinetics involved in the discharge plasma, heat capacity, etc. To design a small-scale device to test experimentally the discharge I atom generation issuing from conclusions of the Task 1, including the following plans: The experiments will start with employing the RF discharge in a mixture of I donors (12, RI) in a carrier gas due to a former experience with the RF discharge during research on the DOlL-related problems. The RF electrode discharge would be ignited directly inside the iodine injector in order to suppress iodine recombination to the lowest possible level. The RF iodine injector would be located in the center of supersonic nozzle throat.. This experimental configuration would allow testing all the above mentioned I precursors. To suggest by CFD modelling, and experimental results of the Task 2 and chemically generated I atoms the most suitable configuration for mixing atomic iodine and 02(1 D) flow.