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М.С. Яшин, В.В. Онуфриев
12
Инженерный журнал: наука и инновации
# 7
2016
On the features of the composite high-temperature
collector performance in the thermionic converter
at reduced cesium pressures
© M.S. Yashin, V.V. Onufriev
Bauman Moscow State Technical University, Moscow, 105005, Russia
An important aspect in finding ways to improve the efficiency of the thermionic converter
(TIC) is to investigate the influence of the uneven distribution of the work function on the
surface of the collector on the distribution of the plasma parameters in the converter. The
reason for this is the formation of so-called "spot field" on the surface of the composite
collector. Under conditions of the TIC plasma the potential field combination in the inte-
relectrode gap and the "spot field" on the collector surface can lead to separation of the
electrode work functions between the areas with different work functions. The study test-
ed a mathematical model of high-temperature TIC with the composite collector, at re-
duced cesium pressure. Moreover, we conducted the numerical solution of differential
equations describing the state of the plasma in the interelectrode gap of the converter.
According to the theoretical results obtained, we made an attempt to make qualitative as-
sumptions concerning the processes occurring in the TIC with a composite collector.
Keywords
: TIC, composite collector, spot field, direct conversion, plasma.
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