Plasma current Rogowski coil

The most direct measurement of total toroidal plasma current, the plasma current Rogowski coil wraps around the poloidal cross-section, in-vessel but behind the shells, in an insulated re-entrant tube. Since the Rogowski is relatively insensitive to currents not passing through the closed loop, and the isolated shells cannot carry a net toroidal current, the Rogowski signal is relatively pristine, although there can be significant pickup at the leads.

The

Fig. 2: Plasma current Rogowski connector in section H

. plasma current Rogowski presently installed is a Rocoil model ???. Specified gain ??????.

Acquisition

The plasma current Rogowski connects to integrator 1, channel 28, and is digitized on Neos input 92. Feedthrough is at the lower GF 6".

History

Prior

Fig. 2: Pre-upgrade plasma current Rogowski coil leads.

to the LTX-β magnetics, the plasma current rogowski ex-vessel wiring is in serious need of trimming and simplification. There is a significant excess length of the ex-vessel leads bundled and looped close to the feedthrough. Historically, the IP Rogowski was digitized on Neos input 90.

Related Pages

Diagnostics

Magnetics (Local): Reentrant array | Toroidal array | Saddle coils | Shell eddy sensors
Magnetics (Areal): Poloidal flux loops | Loop voltage | Diamagnetic loop | IP Rogowski
Spectroscopy: Thomson scattering | ChERS | X-ray spectroscopy | Spectrometry | Vacuum UV spectroscopy
Microwaves: Reflectometry | Interferometry
Physical Probes: HFS edge probes | LFS SOL probes | RFEA
Operational Diagnostics: Ion gauges | Coil current monitors | Thermocouples | RTDs