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The reflectometry on Experimental Advanced Superconducting Tokamak (EAST) isundergoing an upgrade for more comprehensive measurement of plasma densityprofile and fluctuation. The Data Acquisition and Control System (DACS) hasbeen redeveloped to satisfy the requirements of the upgraded reflectometry. Theprofile reflectometry works in 30-110 GHz (X-mode) and 40-90GHz (O-mode), whenthe fluctuation reflectometry operates at 20 fixed frequency points in50-110GHz (X-mode) and 20-60GHz (O-mode). The PXIe-based DACS includes two8-channel 14-bit 250MSPS digitizers and ten 8-channel 12-bit 60MSPS digitizers.A self-developed 5-channel 250MSPS arbiter waveform generator (AWG) is used tocontrol voltage control oscillators for frequency sweeping. A trigger and clockmanger and a timing module receive the trigger and clock signal from centralcontroller and synchronize all the digitizers and the AWG. The total data ratefrom digitizers is 2515 MB/S. The Data from digitizers is streamed to a diskarray (RAID 0) with data throughput capacity of 3000 MB/S. Meanwhile, selecteddata is transported to a FPGA based real-time data processing module, whichutilize a pre-trained neural network to calculate the plasma density profile.Now the new reflectometry is being installed on EAST, and its performance willbe tested in experimental campaign after 2018.

Upgrade of the Data Acquisition and Control System of Microwave Reflectometry on the Experimental Advanced Superconducting Tokamak