@inproceedings{8d0f119565444e848588428f0b428f1d,
title = "TFTR 1mm Density Interferometer",
abstract = "A primary control diagnostic instrument on the Princeton Tokamak Fusion Test Reactor (TFTR) will be a 1mm double-pass interferometer. The interferometer will provide: (a) line average electron density measurements for densities up to 2 × 1014 cm-3, (b) a permissive signal for control of neutral beam firing, and (c) an input signal for the gas feedback controlling system that regulates the electron density level. A 1mm wavelength was selected because of the following considerations: 1. A reliable 1 watt carcinotron source is available. 2. The cut-off density for the probing frequency, 1015 cm-3, is a factor of 3 above the highest average density to be measured. 3. At 1mm wavelength refraction problems are not severe along the available horizontal mid-plane transmission path (i.e., along the density gradient). 4. Low-loss in over-sized waveguide allows the interferometer to be located remotely from the tokamak and thus minimize environmental problems. 5. The interferometer is relatively insensitive to vibration.",
author = "W. Ernst and M. Goldman and F. Senk and H. Anderson and M. McCarthy and V. Arunasalam and P. Efthimion",
note = "Publisher Copyright: {\textcopyright} 1981 IEEE.; 6th International Conference on Infrared and Millimeter Waves, IRMMW 1981 ; Conference date: 07-12-1981 Through 12-12-1981",
year = "1981",
month = dec,
doi = "10.1109/ICSWA.1981.9335097",
language = "English (US)",
series = "6th International Conference on Infrared and Millimeter Waves",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
editor = "Button, \{Kenneth J.\}",
booktitle = "6th International Conference on Infrared and Millimeter Waves",
address = "United States",
}