Speaker
Mr
Alex Tinguely
(MIT)
Description
Alcator C-Mod's high magnetic field allows runaway electron synchrotron emission to be observed in the visible wavelength range. Visible spectrometers were used to measure synchrotron spectra at three magnetic fields: 2.7, 5.4, and 7.8 T. Assuming fixed energy and pitch, the spectral shape is expected to shift toward shorter wavelengths with increasing magnetic field. However, the similarities among measured spectra indicate that runaway electron energies decrease with increased field and are thus limited by synchrotron radiation. Additionally, distortion-corrected visible camera images show the spatial distribution and evolution of runaways in C-Mod. Initial results show good agreement between experiment and the new synthetic diagnostic SOFT (Synchrotron-detecting Orbit-Following Toolkit) [1].
[1] M. Hoppe, et al. Synthetic synchrotron diagnostic for runaway electrons in tokamaks. In progress.
Primary author
Mr
Alex Tinguely
(MIT)
Co-authors
Mr
Mathias Hoppe
(Chalmers University of Technology)
Mr
Ola Embréus
(Chalmers University of Technology)
Dr
Robert Granetz
(MIT)
Prof.
Tünde Fülöp
(Chalmers University of Technology)
