Objectives
Measure magnetic field, magnetic flux, plasma current and halo current for the plasma control and MHD analyses.
Detectors
Eight types of detectors are installed inside the vacuum vessel.
All types of detectors are measured the change of magnetic field.
| Type | Number of detectors |
Measured parameters |
Purposes |
| TC probe | 19 | Tangential component of poloidal magnetic field (Bw) | Plasma control, Equibrium analysis |
| N probe | 19 | Normal component of poloidal magnetic field (Br) | |
| Rogowski Coil for plasma current | 4 | Plasma current | |
| Oneturn Loop | 16 | Toroidal onturn voltage, Vertical magnetic flux | Equilibrium analysis |
| Diamagnetic Loop | 4 sets | Diamagnetic flux | Poloidal beta, Stored energy |
| TM probe | 51 | Tangential component of poloidal magnetic field (Bw) | MHD Analysis |
| Saddle Coil | 8 | Radial component of poloidal magnetic flux (Fr) | |
| Rogowski coil for halo current | 18 | Current flowing to/from vacuum vessel from/to plasma | Halo current |
References
(1) Y. Neyatani, et al., " Developement of magnetic sensors in JT-60 upgrade ", 14th Symp. on Fusion Eng., Vol.2 1183 (1991)