TABLE OF CONTENTS
Personnel
viii
Publications and Reports
xvi
xxii
Introduction
GENERAL PHYSICS
I.
Molecular Beams
1
Low-Temperature Helium Beam Experiment
3
Some Aspects of the Theory and Measurement of Frequency
Fluctuations in Frequency Standards
4
II.
Microwave Spectroscopy
5
III.
Radio Astronomy
7
IV.
Optical and Infrared Spectroscopy
Lattice Vibrational Properties of Hexagonal CdSe
V.
Ultrasonic Properties of Solids
Ultrasonic Attenuation in Ammonium Chloride
VI.
VII.
VIII.
Geophysical Research
13
13
17
High Magnetic Fields
17
Upper Atmospheric Physics
17
Electromagnetic Back-Scattering from Spheres
17
Search for Comet Ikeya-Seki (1965f) at 8 Gc/sec and 15 Gc/sec
18
Gravitation Research
21
Long-Term Frequency Stabilization of a Laser Employing a
Molecular or Atomic Beam as Primary Frequency Reference
22
Collision Quenching of Metastable Krypton by Xenon
24
Noise in Electron Devices
Photoelectron Statistics Produced by a Laser Operating below
the Threshold of Oscillation
QPR No. 80
9
11
27
27
CONTENTS
IX.
Magnetic Resonance
33
X.
X-ray Diffraction Studies
35
XI.
Soft X-ray Spectroscopy
37
XII.
Physical Electronics and Surface Physics
39
Surface Physics
39
Valence-Level Shift of an Alkali Atom as a Result of Interacting with a Metal Surface
39
Induced and Spontaneous Transition in Gas-Surface Interactions
43
Effect of Thermal and Ultraviolet Radiation on Thermionic
Emission from Tungsten
46
Surface Properties of Thermionic Electrodes
51
Free-Molecule Flow Fields
52
Angular Distribution of Orifices and Tubes at High Knudsen
Numbers
Neutralization of Space Charge in Thermionic Diodes
Cesium Molecular-Ion Formation by Collision of Two Excited
Atoms II
XIII.
Physical Acoustics
60
60
75
Dispersion Relation for Surface Waves on a Compressible Fluid
XIV.
52
Electrodynamics of Moving Media
Higher Order Trapped Light-Beam Solutions
75
79
79
PLASMA DYNAMICS
XV.
XVI.
Plasma Physics
83
Far Infrared Plasma Diagnostics with a Michelson Interferometer
85
Ideal Optical Discriminator
89
Gaseous Electronics
Microwave Measurements of a Time-Dependent Electron Velocity
Distribution Function
Radiofrequency Dipole Resonance Probe
QPR No. 80
83
Computer Programmed "Basic Data of Plasma Physics"
99
99
103
CONTENTS
XVII.
Plasmas and Controlled Nuclear Fusion
109
Active Plasma Systems
Beam-Plasma Discharge: Excitation of Ions at the Ion
Cyclotron Frequency (Theory)
Beam-Plasma Discharge: Excitation of Ions at the Ion
Cyclotron Frequency (Experiment)
XVIII.
XX.
115
Beam-Plasma Discharge:
System D
117
Energy Gain by Mirror Collisions in the Presence of a
Longitudinal Traveling Wave
Discrete Particle Models of the Beam-Plasma Discharge
120
Dynamics of the Plasma Boundary
128
Hot-Electron Plasma Decay in a Magnetic-Mirror Machine
128
First-Order Correction to the First Adiabatic Invariant
132
Instabilities in an Electron Beam with Transverse Energy
135
Applied Plasma Physics Related to Controlled Nuclear Fusion
137
125
Engineering Problems of Controlled Fusion
139
Turbulent Plasma Arc Experiment
145
Plasma and Magnetohydrodynamic Flows, Waves and Instabilities
151
Magnetohydrodynamic Flows and Shock Waves
152
153
Energy Conversion Research
154
Spontaneous Radiofrequency Emission from Hot Electron Plasmas
159
Electrostatic Plasma Instabilities at Cyclotron Harmonics
159
Interaction of Laser Radiation with Plasmas and Nonadiabatic
Motion of Particles in Magnetic Fields
163
SCIENCES AND ENGINEERING
Statistical Communication Theory
Work Completed
A Subjective Study of Optimum Quantization
Nonlinear Filtering of Convolved Signals
XXII.
113
System C
COMMUNICATION
XXI.
111
Beam-Plasma Discharge:
Status of Research
XIX.
109
Processing and Transmission of Information
QPR No. 80
165
167
167
168
177
Truncating a Convolutional Code
180
Simulation of Sequential Decoding for a Telemetry Channel
183
CONTENTS
XXIII.
Artificial Intelligence
195
XXIV.
Speech Communication
197
Real-Time Spectral Input System for Computer Analysis of
Speech
XXV.
XXVI.
205
Description of Tongue Shape and Position during Vowel
Articulation
208
Linguistics
Cognitive Information Processing
222
Pattern Recognition
Automatic Recognition of Sheet Music
Communications Biophysics
225
225
227
239
Statistical Mechanics and Field Theory
243
Neurophysiology
Computer Research
Network Synthesis
Computation Research
QPR No. 80
225
Statistical Analysis of Electrophysiological Data from Auditory
Nerve Fibers in Cat
Nonreciprocity Figure of Merit for Passive Resistive Devices
XXXI.
222
232
Status of Research
XXX.
222
A Method for Studying Response and Inhibition Areas of Some
Single Units in the Auditory System
Number of Modes of Oscillation of a Net of N Neurons
XXIX.
213
214
Phonological Code-Switching Time in Bilingualism
Grapheme -to-Phoneme Translation of English
XXVIII.
198
On the Stoic Theory of Tenses
Cognitive Processes
XXVII.
197
SPASS - An Improved Terminal Analog Speech Synthesizer
Children's Learning and Recall of Grammatical and Nongrammatical Nonsense Syllables
249
253
255
255
259
259
263
Newton's Method for Finding Complex Roots of a Transcendental Equation
263
Numerical Example to Illustrate Kizner's Method for Solving
Nonlinear Equations
266
CONTENTS
XXXII.
Advanced Computation Systems
269
XXXIII.
Stroboscopic Light Research
271
Author Index
QPR No. 80
273