A centrifuge rotor constructed of steel and Duralumin ST‐14 weighing 4.93 kilograms and having a radius of 65 mm to the center of the standard centrifuge cell, which contains the material to be centrifuged, is suspended magnetically in a high vacuum (pressure less than 10−5 mm Hg). The rotor is driven to running speed by an air turbine below the vacuum chamber. The turbine is connected to the rotor by a small steel shaft along the axis of rotation and passing through vacuum‐tight oil glands into the vacuum chamber. When the rotor reaches operating speed, the shaft is disconnected and the rotor is allowed to coast freely during the sedimentation experiment. This is possible because of the very small deceleration of the rotor (less than a 0.1 revolution per sec per hour). As a result the temperature and rotor speed not only can be measured accurately, but can be maintained very nearly constant. The ultracentrifuge has been used both for rates of sedimentation measurements and for sedimentation equilibrium measurements, but is especially suited for the latter.
Skip Nav Destination
,
,
Article navigation
February 1951
Research Article|
February 01 1951
Magnetically Suspended Vacuum‐Type Ultracentrifuge
J. W. Beams;
J. W. Beams
University of Virginia, Charlottesville, Virginia
Search for other works by this author on:
J. D. Ross;
J. D. Ross
University of Virginia, Charlottesville, Virginia
Search for other works by this author on:
J. F. Dillon
J. F. Dillon
University of Virginia, Charlottesville, Virginia
Search for other works by this author on:
J. W. Beams
J. D. Ross
J. F. Dillon
University of Virginia, Charlottesville, Virginia
Rev. Sci. Instrum. 22, 77–80 (1951)
Article history
Received:
September 20 1950
Citation
J. W. Beams, J. D. Ross, J. F. Dillon; Magnetically Suspended Vacuum‐Type Ultracentrifuge. Rev. Sci. Instrum. 1 February 1951; 22 (2): 77–80. https://doi.org/10.1063/1.1745858
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Overview of the early campaign diagnostics for the SPARC tokamak (invited)
M. L. Reinke, I. Abramovic, et al.
Automated polarization rotation for multi-axis rotational-anisotropy second harmonic generation experiments
Karna A. Morey, Bryan T. Fichera, et al.
Measurement setup for the characterization of integrated semiconductor circuits at cryogenic temperatures
P. J. Ritter, M.-A. Tucholke, et al.