Analogue feedback control system of RFX

P. Fiorentin, E. Gaio, G. Marchiori, V. Toigo

Research output: Contribution to journalArticle

11 Citations (Scopus)


The paper deals with the design and the experimental results of the first feedback control system of the main plasma quantities for a reversed field pinch (RFP) machine. It was designed for RFX (Reverse Field eXperiment), the largest presently operating RFP device. The peculiar aspects of RFP with respect to Tokamaks are highlighted by considering their influence on the specifications of the control system design and the choice of the controlled quantities. Three feedback loops were implemented: the control of the plasma current, the toroidal magnetic field at the wall and the poloidal magnetic field configuration. The main purpose of the last loop is to minimize the field errors at the poloidal cuts of the conducting shell which surrounds the RFX vacuum vessel. The evaluation of the transfer functions of the systems and the regulator design are presented together with the experimental results obtained till now. The validation of the models used for the regulator synthesis was also performed and its results are reported.
Original languageEnglish
Pages (from-to)221 - 238
Number of pages18
JournalFusion Engineering and Design
Issue number3
Publication statusPublished - 1 Aug 1996
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Fiorentin, P., Gaio, E., Marchiori, G., & Toigo, V. (1996). Analogue feedback control system of RFX. Fusion Engineering and Design, 31(3), 221 - 238.