Diagnostic Potentials of Diamagnetic Measurements with Two Loops in Tokamaks

Analysis of Electromagnetic Loads on the Vacuum Vessel during Thermal Quench in the TRT Tokamak

“…We note that the validity of estimate (12), which leads to Eqs. ( 13), (14), and (15), can be verified experimentally using the magnetic measurements [47].…”

“…The effect of the current on the wall forces was discussed in [25,45], and then in [31,32,46,47]. In [45], it was numerically shown for the first time that the poloidal currents induced during disruptions in the IGNITOR tokamak can have a considerable effect on both the total radial force and the normal force acting on the wall.…”

“…In the analytical model leading to Eq. ( 7), the induced current is given by the following equality [48] (see also (39) in [47]): (12) where is the total poloidal current in the coils creating the toroidal field at the axis , is the mean poloidal field at the plasma boundary, and and are the volumes of plasma and plasma-wall vacuum gap. The radial force associated with this current must be equal to [25] ( 13) where the upper index pt indicates the origin of this partial force: the interaction of the poloidal current with the toroidal field.…”

Diamagnetic diagnostics of rapid events in the T-15MD tokamak

“…For axially symmetric systems, theory confirms the reliability of these methods. It provides a set of mathematically precise (and easily treatable too) relations [30,31] that facilitate the analysis and the decisions on the optimal processing of data. Besides, it gives an extra link between the relevant quantities eliminating thereby one unknown.…”

“…This, formally, makes one 'additional' measurement redundant, which opens new possibilities of calibration and crosschecking. Here we apply both the analytical approach based on [30,31] and the DINA code [32][33][34] to evaluate the effect of the poloidal current induced in the vacuum vessel wall on the diamagnetic signals.…”