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Microwave Process Control Through A Traveling Wave Tube Source

Published online by Cambridge University Press:  10 February 2011

G. J. Vogt ,
A. Regan ,
A. Rohlev  and
M. Curtin
G. J. Vogt
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico, 87545.
A. Regan
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico, 87545.
A. Rohlev
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico, 87545.
M. Curtin
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico, 87545.
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Abstract

A rapid feedback control system was designed to operate with a traveling wave tube amplifier for regulating the sintering temperature of tows and tubes in a single mode microwave cavity. The control system regulated the microwave frequency and power absorbed by the sample in order to maintain the sample temperature. Testing with NICALON tows and mullite tubes demonstrated that the control scheme worked well for stationary and slowly moving (<10mi/min) samples, but failed for fast moving samples. Difficulty with measuring sample temperatures was resolved by using a light sensor to measure the emitted light intensity and to gauge the relative degree of heating. This work was supported by the Department of Energy, Office of Industrial Technologies, Advanced Industrial Materials Program.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 513
Copyright
Copyright © Materials Research Society 1996

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References

1. Vogt, G.J., Regan, A.H., Rohlev, A.S., and Curtin, M.T. in Microwaves: Theory. and Application in Materials Processing III, edited by Clark, D.E., Folz, D.C., Oda, S.J., and Silberglitt, R. (Ceram. Trans. 59, Westerville, OH, 1995) pp. 125–132.Google Scholar
2. Vogt, G.J., Regan, A.H., Rohlev, A.S., and Curtin, M.T. in Conference Proceedings for Microwave and High Frequency Heating 1995 (Cambridge University, Cambridge, U.K., 1995) pp. F3.1–F3.4. Google Scholar