Large Radio Frequency Ion Engines

Аuthors

Loeb H. W.^*, Popov G. A.^**, Obukhov V. A.^**, Feili D. ^***, Collingwood C. M.^****, Mogulkin A. I.^*****

Justus-Liebig-Universität,

*e-mail: H.W.Loeb@exp1.physik.uni-giessen.de
**e-mail: riame@sokol.ru
***e-mail: davar.feili@exp1.physik.uni-giessen.de
****e-mail: cheryl.collingwood@physik.uni-giessen.de
*****e-mail: riame@sokol.ru

Abstract

A large RF-ion thruster “RFIT-45”, having an ionizer diameter of 48.6 cm and consuming 35 kW of power, is described. It is scheduled to generate a thrust of 760 mN at a specific impulse of 7000 s and a lifetime of more than 50,000 hours. The beam current will be 7.0 A, the positive high voltage 4.5 kV. A 1 MWe nuclear power plant could supply up to 30 clustered thrusters. At lifetime penalty, a thrust-enhanced single engine may generate 1.08 N at nearly 50 kW of power. To keep the lifetime specification, an enlargement of the rf-thruster (65 cm ionizer diameter and 70 kW or 80 cm and 105 kW) may reduce the number of clustered engines, too. The RFIT-45 engine has been designed in accordance with smaller RIT-devices. A set of technical drawings is available. The scheduled performance data were derived from scaling laws of the RIT-family.

Keywords:

radio frequency ion thrusters; thruster design; scaling laws; high power; high specific impulse; lunar cargo ferry; Mars excursion ship; nuclear power plant

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