Upgrade of the Magnetic Fault Detection System of RFX-mod2

This article describes the present upgrade of the RGM system, the magnetic fault detection system designed for RFX (named RGM, from the Italian acronym rilevamento guasti sistemi magnetici), to be fully compliant with the new device RFX-mod2, considering both machine and operational modifications. RGM was originally designed for RFX, and it was based on the symmetries of: 1) the magnetic structures of RFX windings and 2) the topology of the electrical circuits. Then, in the early 2000s, a refurbishment of RGM took place in view of the machine upgrade to RFX-mod. Nowadays, the present upgrade to RFX-mod2 requires further modifications to the RGM system, making it compatible with new machine and operational specifications. RGM will be equipped with several additional magnetic sensors to overcome some constraints due to its original working principle and refurbished with redesigned electronic boards based on state-of-the-art technologies and components. The new system is designed to be fully compatible with the existing hardware, in order to keep advantage of the strengths of the original system.

[1]  G. Marchiori,et al.  Model based computation of electromagnetic forces in magnetic confinement toroidal devices by using magnetic measurements , 2021 .

[2]  G. Marchiori,et al.  Modelling of RFX-mod2 tokamak equilibria with DEMO-like shape conditions and negative triangularity , 2020, Plasma Physics and Controlled Fusion.

[3]  G. Manduchi,et al.  Upgrades of the RFX-mod reversed field pinch and expected scenario improvements , 2019, Nuclear Fusion.

[4]  Piergiorgio Sonato,et al.  Detailed design of the RFX-mod2 machine load assembly , 2018, Fusion Engineering and Design.

[5]  L. Marrelli,et al.  Design constraints on new vacuum components of RFX-mod2 upgrade using electrical modeling of reversed field pinch plasma , 2018, Fusion Engineering and Design.

[6]  G. Marchiori,et al.  Design and operation of the RFX-mod plasma shape control system , 2016 .

[7]  Sergio Ortolani,et al.  Machine modification for active MHD control in RFX , 2003 .

[8]  V. Toigo,et al.  Upgrade of the RFX fast protection system in view of the new operating scenarios and machine modifications , 2003 .

[9]  V. Toigo,et al.  A new power supply scheme for the toroidal circuit of RFX , 2001 .

[10]  V. Toigo,et al.  Thyristor making switch system for plasma startup control in RFX , 1999, 18th IEEE/NPSS Symposium on Fusion Engineering. Symposium Proceedings (Cat. No.99CH37050).

[11]  F. Bellina,et al.  The RFX magnet system , 1995 .

[12]  P. Sonato,et al.  The Plasma System of RFX , 1995 .

[13]  Massimo Guarnieri,et al.  THE FAULT DETECTION SYSTEM OF THE WINDINGS OF RFX , 1993 .

[14]  Massimo Guarnieri,et al.  THE GLOBAL FAST PROTECTION SYSTEM OF RFX , 1993 .