The Software Platform of LabVIEW-FPGA-Based Real-Time Processing System in Keda Torus eXperiment

The Keda Torus eXperiment (KTX) is a reversed field pinch (RFP) magnetic confinement device located in China. Due to the nonideal conductivity of the copper shell and the presence of a toroidal gap, KTX is susceptible to magnetohydrodynamic (MHD) instabilities and error fields, which can significantly degrade plasma discharge quality. To actively control these MHD instabilities, we developed a real-time feedback control system based on LabVIEW-FPGA. This system is integrated into the active control feedback electronic system (ACFES). It combines hardware for data acquisition (DAQ), processing, and aggregation with a corresponding software platform to analyze real-time MHD instability modes in KTX. The system subsequently transmits active control feedback signals to the KTX digital power supply array, generating a compensating magnetic field to mitigate MHD instability. Experimental results demonstrate that our system effectively extends the discharge duration of KTX.