Electrostatic Propulsion

Ion and Plasma Propulsion Committee

Preface

A. Ion Generation

Introduction

Experimental Performance of Ion Rockets Employing Electron-Bombardment Ion Sources

The Duoplasmatron: Theoretical Studies and Experimental Observations

The Development of a Negative Ion Source

Liquid Metal Droplets for Heavy Particle Propulsion

The Oscillating-Electron Plasma Source

Theory of Ion Emission From Porous Media

Characteristics of Porous Surface Ionizers

The Effects of Surface Structure and Adsorption on the Ionization Efficiency of a Surface Ionization Source

B. Ion Acceleration and Impact Effects

Introduction

Multiple Beam Ion Motors

Space-Charge Theory for Ion Beams

Sputtering Due to High Velocity Ion Bombardment

Sputtering of Copper by Ion Bombardment in the Energy Range of 5-25 keV

C. Neutralization

Introduction

A Three Dimensional Calculation of the Effects of Insufficient Space Charge Neutralization on Ion Rockets

Numerical Techniques in the Calculation of Effects of Insufficient Space Charge Neutralization on Ion Rockets

Justification of the Use of the Collisionless Boltzmann Equation for Ion Beam Neutralization Studies

Circular Beam Neutralization

An Electrogasdynamic Approach to the Ion Jet Charge Neutralization Problem

Neutralization of Ion Beams for Propulsion by Electron Trap Formation

Transient and Steady State Behavior in Cesium Ion Beams

Neutralization of Ion Beams

On Ion Rocket Neutralization

Present Status of the Beam Neutralization Problem

D. Techniques and Testing

Introduction

Theory and Application of Hot-Wire Calorimeter for Measurement of Ion Beam Power

Beam Diagnostic Techniques

Diagnostics of the Space Charge Neutralization of Ion Beams by Electron Injection

Engineering Research in Electrostatic Propulsion Devices

Diffusion of Cesium and Ionization on Porous Tungsten

Trajectories and Thrust-Measurement Techniques for Space Testing of Ion Rocket Motors

Instrumentation Program for Ion Engine Testing

Concluding Remarks