Articolo in rivista, 2023, ENG, 10.1088/1748-0221/18/02/C02057

Feasibility study of an enhanced heterodyne dispersion interferometer

Fiorucci D.; Fassina A.; La Matina M.

ENEA, Frascati research center, Frascati RM, Italy; Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete SpA), Padova and CNR ISTP - Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; Department of Physics and Astronomy, Padova University, Padova, Italy.

Interferometry is the commonly exploited technique for electron density measurements in magnetically confined fusion plasma experiments. Reliable electron density measurements are fundamental both for machine protection and for plasma physics understanding. In the last years, attention was drawn on the dispersion interferometer concept, because of its robustness and simplicity. Nevertheless, the heterodyne version of this configuration, which has several advantages over the homodyne scheme, loses one of the main benefits of the dispersion interferometer technique, that is its inherent insensitivity to vibration errors. In this paper, two methods are proposed and theoretically investigated to reduce the vibration noise in the electron density measurements performed with heterodyne dispersion interferometers.

Journal of instrumentation 18 , pp. C02057-1–C02057-7

Keywords

Nuclear instruments and methods for hot plasma diagnostics, Plasma diagnostics - interferometry spectroscopy and imaging

CNR authors

Fassina Alessandro

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi