By electrostatic methods, μ‐diam spheres of iron have been accelerated to hypervelocities. Techniques have been developed to give single impacts in vacuum of measured incident velocity, mass, and position.
R. H. Good, Jr., and E. W. Müller Handbuch der Physik (Springer‐Verlag, Berlin, Vienna, 1956), Vol. 21, p. 174.
C. D. Hendricks, Jr., “Macroscopic particle accelerators,” ERL‐LM‐154, Electronic Research Laboratory, The Ramo‐Wooldridge. Corporation, Los Angeles 45, California.
J. Appl. Phys.
J. Appl. Phys.
Carbonyl iron powder consists of pure iron spheres whose radii are the order of a few microns or less. This material is manufactured by General Aniline and Film Corporation, Dyestuff and Chemical Division, Linden, New Jersey.
It is to be noted that the behavior of any electrostatic lens is independent of the ratio of the particles. The initial focus of the accelerator was tested by substituting a hair pin filament for the point charging electrode, reversing the accelerating potentials, and observing the terminus of the electron beam on a phosphor screen mounted before the target.
Arrangements were made for the use of a Phillips EM‐100 electron microscope owned by the Harvey Machine Company, Inc., of Torrance, California. The members of the Artificial Meteor Project want to thank the technical staff of this company for their helpful cooperation; particularly Robert Simonson, engineer, for operating the microscope and also for many helpful discussions.
A simple multiple‐beam interferometer was constructed for measuring to within. 0.003 μ the thickness of the evaporated films on glass.
This content is only available via PDF.
© 1960 The American Institute of Physics.
The American Institute of Physics