TJ-II:Heavy Ion Beam Probe
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File:HIBP.png
HIBP probe, photo and schematic
The advanced Heavy Ion Beam Probe can simulataneously measure the plasma electric potential φ, the electron density ne, the electron temperature Te, and a poloidal magnetic field component Bp at a point inside the plasma. [1] [2] This point can be scanned through the plasma cross-section by varying the deflection potentials.