Electron cyclotron emission spectra are routinely measured in the FTU tokamak by means of a fast scanning Fourier transform spectrometer. The key element of this instrument is a two-beam interferometer in which the path difference is varied linearly in time by rotation of a helicoidal reflector. The shortest scan time obtained for a path difference excursion of 4 cm was 1.2 ms. The spectrometer has been absolutely calibrated and the measured temperature profiles are in good agreement with those derived from other diagnostics. © 1995 American Institute of Physics.
All Science Journal Classification (ASJC) codes
Buratti, P., & Zerbini, M. (1995). A Fourier transform spectrometer with fast scanning capability for tokamak plasma diagnostic. Review of Scientific Instruments, 66(8), 4208 - 4217. https://doi.org/10.1063/1.1146438