PROBE MEASUREMENTS OF THE DISCHARGE IN AN OPERATING ELECTRON BOMBARDMENT ENGINE
Properties of the plasma inside an operating kaufman-type electron bombardment engine, with langmuir probes
LANGMUIR PROBE↗
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A mercury electron-bombardment ion thrustor suitable for spacecraft station keeping and altitude control
Mercury electron bombardment ion thrustor with radial flow propellant distributor for spacecraft attitude control
MERCURY /METAL/↗
Component testing of a 30-centimeter diameter electron bombardment thruster
Critical components effect on small Hg electron bombardment thrustor derformance, considering glass coated accelerator grids, hollow cathodes and plasma bridge neutralizers
Bechtel, R. T.↗
Electron bombardment ion engine Patent
Electric rocket engine with electron bombardment ionization chamber
Masek, T. D.↗
Operation of an electron-bombardment ion source using various gases
An electron-bombardment ion thruster of the SERT 2 type was operated with xenon, krypton, argon, neon, nitrogen, helium, and carbon dioxide. The discharge performance with xenon, krypton, and argon was similar to that obtained previously with mercury. Mass spectrometer data indicated that the xenon contained no significant multiple ionization. Restriction of the beam area, with an associated decrease in discharge potential, was necessary to reduce multiple ionization with argon to a negligible level. This modification also resulted in more stable operation of the thruster. Performance with the remaining gases was poor because the basic thruster designed was optimized for operation with mercury.
Byers, D. C.↗
Electron-bombarded CCD detectors for ultraviolet atmospheric remote sensing
Electronic image sensors based on charge coupled devices operated in electron-bombarded mode, yielding real-time, remote-readout, photon-limited UV imaging capability are being developed. The sensors also incorporate fast-focal-ratio Schmidt optics and opaque photocathodes, giving nearly the ultimate possible diffuse-source sensitivity. They can be used for direct imagery of atmospheric emission phenomena, and for imaging spectrography with moderate spatial and spectral resolution. The current state of instrument development, laboratory results, planned future developments and proposed applications of the sensors in space flight instrumentation is described.
Carruthers, G. R.↗
Excitation of n equal 2 states in helium by electron bombardment.
Measurement of total cross section for excitation of metastable atoms of helium by electron bombardment
METASTABLE ATOM↗
Preliminary tests of insulated accelerator grid for electron-bombardment thrustor
Performance tests of single ceramic protected metallic accelerator grid for direct current electron bombardment thrustor
GRID↗
ELECTRON BOMBARDMENT INDUCED CONDUCTIVITY INCLUDING ITS APPLICATION TO ULTRAVIOLET IMAGING IN THE SCHUMAN REGION
Electron bombardment induced conductivity - ultraviolet imaging in the schuman region
INTELLECT↗
AN ELECTRON-BOMBARDMENT ION ROCKET WITH A PERMANENT MAGNET
Utilization of a permanent magnet circuit in an electron-bombardment ion rocket
IONIC PROPULSION↗
BEAM NEUTRALIZATION TESTS OF A FLIGHT MODEL ELECTRON BOMBARDMENT ENGINE
Beam neutralization tests of a flight model electron bombardment engine
FLIGHT TEST↗
Electron bombardment ion source for low energy beams.
High current electron bombardment ion source for production of low energy ion beams without metastable contamination
Dworetsky, S.↗
A sub-millipound mercury electron-bombardment thruster
Component tests of 5-cm diameter mercury electron- bombardment ion thrusters
Banks, B. A.↗
Component testing of a 30-centimeter diameter electron bombardment thruster
Performance tests of critical components on mercury electron bombardment thruster
Bechtel, R. T.↗
Low-frequency plasma noise from the electron- bombardment ion thruster
Low frequency plasma noise from mercury electron bombardment ion thrustor studied for several magnetic field configurations
Cohen, A. J.↗
PROBE MEASUREMENTS OF THE DISCHARGE IN AN OPERATING ELECTRON BOMBARDMENT ENGINE
Experimental investigation of the properties of the plasma inside an operating kaufman-type electron bombardment engine, with langmuir probes
LANGMUIR PROBE↗
Electron-bombardment ion source operation using various gases
Performance tests of electron bombardment ion thrustor, using xenon, krypton argon, neon, nitrogen, helium and carbon dioxide
Byers, D. C.↗
Ion time-of-flight determinations of doubly to singly ionized mercury ion ratios from a mercury electron bombardment discharge
Doubly to singly charged mercury ion ratios in electron bombardment ion thruster exhaust beams have been determined as functions of bombardment discharge potential, thrust beam current, thrust beam radial position, acceleration-deceleration voltage ratio, and propellant utilization fraction. A mathematical model for two-step ionization processes has been derived, and calculated ion ratios are compared to observed ratios. Production of Hg(++) appears to result primarily from sequential ionization of Hg(+) in the discharge. Experimental and analytical results are presented, and design, construction, and operation features of an electrostatic deflection ion time-of-flight analyzer for the determination of the above-mentioned ratios are reviewed.
Sellen, J. M., Jr.↗