An analog integrator for thousand second long pulses in Tore Supra

In the year 2000, a new version of the analog integrator used in Tore Supra for magnetic measurements has been designed. Although based on the same principles, this new integrator was improved in order to satisfy the new long duration of pulses, up to 1000 s, expected in near future on Tore Supra. After recalling the basic principles of the analog integrators and recent improvements, this article explains the main characteristics of the new integrators, tests and obtained results. The conclusion underlines the most important results and, in particular, the capability of the new integrator to answer to the International thermonuclear experimental reactor (ITER) requirements.