Behind the build: crafting the innovation of RFX-mod2
The RFX-mod2 machine is formed by an ultra high vacuum support structure
(VTSS) which also includes the copper shell inside which the anisotropic graphite tiles are housed. These tiles form the first wall, the structure closest to the plasma, designed to support the high-power loads related to the interaction with the plasma.
The VTSS provides mechanical support to the external coils and is equipped with 150 ports to allow access to the vacuum pump, gas supply and diagnostics system.
The vacuum chamber is housed in a support structure inside RFX experimental room
The parameters
| Maximum plasma current | 2 MA |
| Maximum plasma temperature | 20 M °C |
| Impulse duration | 0.5 s |
| Particles/m3 | ~ 5*1019 |
The magnetic confinement coils
The magnetic confinement of fusion plasma is based on the fact that ions and electrons, charged particles, are forced to follow the magnetic field lines.
Several types of magnets are used to bring the RFX-mod2 experiment into an RFP configuration:
MAGNETIZING WINDINGS, which induce the poloidal field and plasma current
FIELD SHAPING (FS) WINDINGS, also called primary windings, which are meant to control the plasma equilibrium
TOROIDAL WINDINGS supply the toroidal component to the magnetic field
ACTIVE COIL SYSTEM, formed by 192 saddle coils positioned in 48 toroidal positions with 4 coils assigned to each position. This system provides a radial magnetic field.