TABLE OF CONTENTS
vi
Personnel
x
Publications and Reports
xiii
Introduction
I.
1
Physical Electronics
Electron Emission Problems
Magnetic Velocity Analyzer Investigation
of Thermionic Emission from Tungsten
1
Photoelectric Study of Surface States on Insulators
1
3
Studies with Gas Discharge
Measurements in a Low Pressure Mercury Arc
3
3
Experimental Techniques
II.
1
Ionization Gauge Studies
3
Design and Construction of Circuits
for Bayard-Alpert Gauges
5
7
Microwave Gaseous Discharges
Positive Ion Analysis
7
The Steady State Discharge in Hydrogen
7
Oscillations in D-C Discharges
10
Breakdown in Hydrogen at 100 Mc/sec
11
III.
Solid State Physics
13
IV.
Low Temperature Physics
14
V.
Magnetic Dipole Interactions in Crystals
14
Resistance Minimum Measurements
14
Automatic Control of Liquid Helium Bath Temperature
15
Temperature and Pressure Dependence of the Viscosity
of Liquid Helium
15
Measurement of Second Sound Pulse Heights in Liquid
Helium II
16
The Specific Heat of Magnesium
16
Measurement of Thermal Conductivity of Magnesium at
Liquid Helium Temperatures
17
Thermoelectric Forces
17
Study of Thermal Properties of Solids by a Pulse Technique
17
Magnetic Determination of the Thermodynamic Temperature
Scale
18
Pressure Dependence of Second Sound Velocity in the
Adiabatic Demagnetization Region
18
Microwave Spectroscopy
20
Zeeman Effect
20
Paramagnetic Resonance Experiments
20
-iii-
VI.
VII.
Molecular Beam Research
25
Chlorine Experiment
25
Surface Ionization of Halogens
25
Magnet Laboratory Research
27
Nuclear Magnetic Resonances
Field Homogeneity of the Barrel-Type Electromagnet
Double Resonance Experiments
Nuclear Orientation in Mercury Vapor
The
Pl Level of Hg
201
27
27
28
Magnetic Properties of Solids
28
The Rare Earths
28
Diamagnetism of Metals in Weak Fields
28
Zeeman Effect in Atomic Hydrogen
29
Tube Research and Development
30
Magnetron Development
30
Testing and Design of High Power 10. 7-Cm Magnetrons
Microwave Tubes
30
31
Noise and Space Charge Waves
IX.
27
27
Effects in Sodium
VIII.
27
31
Multivelocity electron flow in a temperature-limited
diode at high frequencies
31
Experimental study of noise on electron beams
33
Traveling wave tube design
33
1-Mev Pulsed Electron Source
33
Spiral Beam Oscillator
34
Oscillator Magnet Gaussmeter
34
36
Communication Research
36
Multipath Transmission
Speech and Music.
Transatlantic Tests
36
Television
36
Simplified FM Receiver
37
Statistical Theory of Communication
38
Multichannel Analog Electronic Correlator
38
Analog Electronic Correlator for Second-Order
Correlation
38
Cathode Ray Tube Display of Correlator Output
39
Crosscorrelation Functions Relating to Amplitude
Clippers
42
Synthesis of Speech from Short Time Autocorrelation
Function
43
Information Theory
46
Energy limitations in information theory
-iv-
46
Transmission of information through channels
in cascade
Human Communication Systems
48
Parallel Chain Amplifier
49
Experimental Approximation and Network Alignment
New Methods of Network Synthesis
53
Transient Problems
55
Basic Existence Problems
Network Synthesis for Prescribed Transient Behavior
X.
47
Analog Computer Research
The Operation of Present Computers
The Macnee Differential Analyzer
The Scott Impedance Function Analyzer
The Design of New Computing Elements
54
55
55
56
56
56
56
56
Integral Equation Computer
56
Function Generator
57
Analog Digital Conversion Device
57
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