Study of the Accelerating Channel Wall Property Influence on the Hall Thruster Discharge Characteristics

摘要

According to the work program and schedule there was developed the methodology of experiments on the discharge chamber material influence on the Hall thruster characteristics there was prepared Hall thruster model of the SPT- 100 type for these experiments and there were manufactured the required discharge chamber parts (rings) made of the Russian BN-SiO2 (borosil) ceramics and of the Russian AIN-BN (ABN) and Western ABN ceramics having secondary electron emission yield (SEEY) different from that one for borosil. These parts were replaceable during experiments. Thruster model was equipped by set of the near wall probes mounted at external discharge chamber wall. There was made characterization of thruster model integral characteristics within the wide enough operation modes and the local plasma parameter distributions along its accelerating channel were determined under basic operation mode with discharge voltage 300V. As result of experiments there were found some differences in integral characteristics under some operations modes and in local plasma parameter distributions under the mentioned basic operation mode in spite of the fact that integral parameters under this basic operation mode were almost the same. Obtained data as a whole confirm that the discharge chamber wall properties have definite impact on the thruster operation.