Design and Stress Analysis of Extraterrestrial ... - The Black Vault

Each grid is a tungsten filament tightened to the frame 9 by means
of flutted adapter 10. The frames are braced to each other and to
the motor housing through insulating plates 11.
The working medium feed unit is designed on the principle of
working medium displacement by the pressure of inert gas. It
consists of tank 12 with neutral gas compressed to a high pressure,
transforming valve 13, working medium container 1A4, dosing devicc 15,
and evaporator 16.
The electric power supply system consists of current supply 17,
18, to provide the energy of the electrodes in the ion-optical jysnem
and motor heating.
After feeding vo)tage to the terminals of ;he Lon-optica! syst'V91
the motor is ready for operation. Then the transforming valve ±i
of the gas cylinder 12 with the controlling gas is open. To th.e
membrane of tank !4 liquid cesiumi is drawn throUgh the proportlor'.n_
valve int. evaporator 16 and chamber 1 of the motor ionizer by gas
pressure. The porous tungsten plate of the ionizer, heated to 1200"K
by radiation of the tungsten grid of heater 2, ionizes the ce.Uum'
vapor, positive particles of whiceh are extracted throlugh the pureZ
of the porous, tui.gsten into' tne ion-opt-ical system where they are:
accelerated up to the necessary velocity.
The team of po~it~ve particleI. ;. neu.ra.Lt.zed o,' el. c-,-, ns
emitted by the heaLed tungsten grid 8.
The advantage of this system is its simplicitLy. The dIsad vx:t:
of the motor iJ Srid erosion, as wc-I as the high.r nest 1 5ss" tlxo(,th
the porous tungsten plate.
Motor with a plate-type ion-optical system
and surface ionization of the working medium
'ih•* motor (Fig. .' 35) consl:-." of the ionizer unit, ti. .r;aoptical
•ystem, the f, td i d :ystem,
the eleotrical po ..-.. s;ystem.
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