Speaker
Description
SPARC [1] is a high-field (12T), superconducting, D-T tokamak under development by Commonwealth Fusion Systems. SPARC aims to demonstrate a fusion gain (Q) > 1, with projections to reach Q ~ 11 in high-performance plasmas [1]. An electron cyclotron emission (ECE) radiometer will provide kinetic profile measurements important for thermal stored energy measurements and verifying fusion gain as well as for plasma control, including the detection of ELMs and disruption pre-cursors [2,3]. The multi-channel heterodyne radiometer will perform core-to-edge measurements within the frequency range 245-345 GHz for 12T plasma operation using 1st harmonic, O-mode emission. Calibration of the diagnostic will ensure accurate measurements of the plasma profiles up to electron temperatures on the order of 25 keV [4]. This contributed presentation will provide an overview of preliminary calibration plans in development for the successful operation of this diagnostic.
*This work is funded by Commonwealth Fusion Systems under Performance and Transport RPP020 and Early Campaign Diagnostics RPP031.
[1] A. J. Creely et al, J. Plasma Phys. (2020), vol. 86, 865860502
[2] M. L. Reinke et al, Rev. Sci. Instrum. 95, 103518 (2024)
[3] R. A. Tinguely et al, contributed talk, APS DPP 2023
[4] P. Rodriguez-Fernandez et al, J. Plasma Phys. (2020), vol. 86, 865860503
