Sep 20 – 24, 2021
America/Vancouver timezone

Study of SPIDER Beam Current Through Visible Light Measured by Beam Imaging Diagnostic

Not scheduled
Poster Beam extraction, transport, and diagnostics Poster Session 1


Margherita Ugoletti (University of Padua)


The injection of high-energy neutral beam of H and D is one of the most important heating system for future fusion nuclear reactor. SPIDER, the full-size prototype of the ITER negative ion source, is equipped with 15 visible cameras composing the tomographic diagnostic, which exploits the visible light emitted by the beam particles after the interaction with the background gas to characterize the beam. This light is proportional to the beam density itself, since the background gas in which they propagate is homogeneous. The light measured by the visible cameras can be compared with the electrical measurements of the beam current, by taking into account the dependence of the signal on the energy of the beam particles. The amount of light produced both by D and H negative ions beam is studied for different energies and background pressures, proving the capability of this diagnostic to estimate the beam intensity, along the entire beam profile.

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Funding Information The work leading to this publication has been funded partially by Fusion for Energy. This publication reflects the views only of the author, and F4E cannot be held responsible for any use which may be made of the information contained therein. The views and opinions expressed herein do not necessarily reflect those of the ITER Organization.

Primary author

Margherita Ugoletti (University of Padua)


Dr Matteo Agostini (Consorzio RFX)

Presentation materials