Test Setup: ROC Chamber with TPC DAQ. Monitoring Of R/O Channel Noise and Studying the Influence of Harmonics from The CAEN LV Power System On R/O Channel Noise.

The MPD detector is one of two at NICA collider. The Time Projection Chamber (TPC) is the main tracking and particle identification detector of MPD experiment. FE electronics for ROC chamber r/o system based on SAMPA ASIC and FPGAs (for data collection and transmission to controller). Charge sensitive amplifier of SAMPA chip has bandwidth with max at 1 MHz and ADC clock - 10 MHz. Controller based on ARRIA-5 FPGA. Copper and optics links are used for data transmission at a speed of 2.5 Gbps and 40 Gbps. Clocks are 100 MHz and 320 MHz. The TPC LV and HV systems are based on CAEN system EASY3000 with power modules A3100B and OPC UA server protocol. So, some frequencies and harmonics appeared in the SAMPA output signal and worsen r/o channels parameter “noise”. The Master SCADA 4D was chosen for design TPC detector control system (TPC DCS). Electromagnetic environment around of the ROC chamber with running FEC cards and DAQ system was studied with help of vector analyzer, scope with FFT and TPC LV GUI. ROC chamber parameter (channels “noise”) is presented after additional power filtering.