Abstract
Turbulent temperature fluctuations are measured on the ASDEX Upgrade tokamak using pairs of closely spaced, narrow-band heterodyne radiometer channels and a standard correlation technique. The pre-detection spacing and bandwidth of the radiometer channel pairs is chosen such that they are physically separated less than a turbulent correlation length, but do not overlap. The radiometer has 4 fixed filter frequency channels and two tunable filter channels for added flexibility in the measurement position. Relative temperature fluctuation amplitudes are observed in a helium plasma to be δT/T = (0.76 ± 0.02)%, (0.67 ± 0.02)%, and (0.59 ± 0.03)% at normalised toroidal flux radius of ρtor = 0.82, 0.75, and 0.68, respectively.
Original language | English |
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Article number | 11E102 |
Pages (from-to) | 1-3 |
Journal | Review of Scientific Instruments |
Volume | 87 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2016 |
Event | 43rd European Physical Society Conference on Plasma Physics (EPS 2016) - Leuven, Belgium Duration: 4 Jul 2016 → 8 Jul 2016 Conference number: 43 https://kuleuvencongres.be/eps2016 |