Instrumentation with Hall sensors for JET magnetic diagnostics. The results of the recent deuterium campaign at JET in 2009

Magnetic diagnostics is one of the main diagnostics in thermonuclear reactors, and thus enhancing the accuracy of the magnetic field measurement is a relevant task. The paper discusses the principles of construction for magnetic measuring instrumentation based upon the application of steady-state radiation-resistant semiconductor sensors, and the results of its implementation for magnetic field measurement in one of the largest operating reactors JET (Joint European Torus) during the recent deuterium campaign.