PXIe-based multi-channel data acquisition system of soft X-ray camera

Abstract

Soft X-ray cameras will be widely used in the ITER (International Thermonuclear Experimental Reactor) diagnostic system. To acquire their output data to display the signal changes on a computer, a PXIe (PCI Express eXtensions for Instrumentation)-based multi-channel data acquisition system for a soft X-ray camera has been designed and is presented in this paper. The Xilinx FPGA (Field-Programmable Gate Array) chip Kintex7-325T-900-2 is adopted as a controller in this system. The hardware's composition and the PXIe bus transmission of this system are presented and discussed. The acquisition and transmission of the soft X-ray camera's multi-channel data has been accomplished with subsequent processing. Currently, this system can collect signals within 1 MHz, and the system's signal resolution has achieved 0.122 mV.