Apparatus for Friction Studies at High Vacuum
作者:
Virgil R. Johnson,
George W. Vaughn,
Melvin T. Lavik,
期刊:
Review of Scientific Instruments
(AIP Available online 1956)
卷期:
Volume 27,
issue 8
页码: 611-613
ISSN:0034-6748
年代: 1956
DOI:10.1063/1.1715648
出版商: AIP
数据来源: AIP
摘要:
A friction test apparatus has been developed which permits accurate measurements under high vacuum. Sliding motion inside the vacuum chamber is accomplished by magnetic coupling through the chamber wall. The lag angle between the magnets, observed by means of stroboscopic illumination, measures the friction. Calibration of the magnetic coupling is obtained from the period of oscillation of the driven magnet with respect to the driving magnet.
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