Transmission of Elastic Waves through a Stratified Solid Medium

✍ Scribed by Thomson, William T.

• Book ID: 115475183
• Publisher: American Institute of Physics
• Year: 1950
• Tongue: English
• Weight: 493 KB
• Volume: 21
• Category: Article
• ISSN: 0021-8979
• DOI: 10.1063/1.1699629

✦ Synopsis

Although the correction method discussed here is for an electrostatic focusing and deflection system, it is possible to apply the principle of beam predistortion to magnetic focusing and deflection systems as well. In this connection, however, it should be pointed out that magnetic lenses, either spherical or cylindrical, are everywhere converging, i.e., there is no diverging region. If spot correction is attempted by the use of "twodimensional" magnetic lenses, two such lenses rotated 90° with respect to each other are required.

ACKNOWLEDGMENT

The authors wish to take this opportunity of acknowledging the valuable contributions made by L. H. McKee of these laboratories in carrying out most of the experimental part of the work described.