TEST RESULTS FOR A CESIUM ELECTRON BOMBARDMENT ION MOTOR
Cesium electron bombardment ion source for electrostatic propulsion
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Cesium electron bombardment ion source for electrostatic propulsion
Focusing and accelerating electrode materials for cesium contact ion engines, noting advantages of copper, beryllium and molybdenum
Cesium bombardment ion engine performance, giving starting circuit and automatic discharge power control system
Deflectable dual beam, linear strip cesium contact, ion thruster system design and performance testing
Cesium contact ion microthrustor experiment onboard ATS 4, measuring emission currents and spacecraft potentials
Cesium contact ion microthrustor experiment onboard ATS 4, measuring emission currents and spacecraft potentials
Electron-ion emitting characteristics of various electrode materials with cesiated surfaces for cesium contact ion thrustors
Cesium bombardment ion engine performance, giving starting circuit and automatic discharge power control system
Tests were conducted to determine the effects of electrostatic propulsion beam divergence effects on spacecraft surfaces. The subjects discussed are: (1) sensitive surfaces on the ATS 6 spacecraft, (2) the cesium ion source and testing facility, (3) cesium ion effects on thermophysical properties, and (4) simulated charge-exchange ion exposure. The compatibility of the ATS 6 ion engine experiment with the engineering subsystems and other experiments aboard the ATS 6 spacecraft was analyzed.
Interaction between low energy cesium ion beam and thermal cesium plasma
Investigation of cesium ion sputtering of monocrystalline copper using radioactive tracer technique
Charge exchange collisions for 1.5-25 kev He ion beam passed through Cs vapor target of various densities, noting cross sections and composition of products
Performance of porous tungsten cesium ion emitters compared for clean oxygenated and carburized surfaces
Kilovolt ion sputtering - electron beam focusing of cesium ion beam, radiation detection in copper atoms, ultrahigh vacuum system construction, and spectrometer pulse height
Cesium ions do not pass membrane of giant axon
Vacuum work function, cesiated electron emission S curves, cesium ion emission curves, critical temperature envelope, and desorption energies for thrustor electrode surfaces
A cesium filled diode--laser plasmadynamic converter was built to investigate the feasibility of converting laser energy to electrical energy at large power levels. Experiments were performed with a pulsed ruby laser to determine the quantity of electrons and cesium ions generated per pulse of laser beam and to determine the output voltage. A current density as high as 200 amp/sq cm from a spot of approximately 1 sq mm area and an open circuit voltage as high as 1.5 volts were recorded. A qualitative theory was developed to explain these results. In the operation of the device, the laser beam evaporates some of the cesium and ionizes the cesium gas. A dense cesium plasma is formed to absorb further the laser energy. Results suggest that the simultaneous absorption of two ruby laser photons by the cesium atoms plays an important role in the initial ionization of cesium. Inverse bremsstrahlung absorption appears to be the dominant mechanism in subsequent processes. Recombinations of electrons and cesium ions appear to compete favorably with the simultaneous absorption of two photons.
Comparison of electromagnet and permanent magnet versions of electron bombardment cesium ion engine