Readout electronics of a heavy-ion beam telescope for HIAF

Abstract The beam telescope, consisting of multiple detection planes for beam tracking and calibrating position detectors, has performed excellently in various international physics experiments and equipment. This article proposes a readout electronics to fulfill the needs of a heavy-ion beam telescope at the High-Intensity Heavy-ion Accelerator Facility (HIAF). The readout electronics comprises six Common Pixel Readout Electronics (CPRs) and a Common Data Aquation Unit Version-4 (CDAU-v4). The CPR acquires the pixel detector's data, supplies the necessary bias voltages and control signals for the pixel detector, and transmits the data to the CDAU-v4 via the optical link at the speed of 10Gbps. The CDAU receives the data from the six CPRs and then transmits the data offline through the PCIe 3.0x8 interface. Lab test shows the CPR has a readout noise of 0.35 mV and a maximum Integral Non-Linearity (INL) of 0.128%. The bit error rate (BER) of the data transmission between the CPR and the CDAU-v4 is low as 1.67 × 10 -15 . This readout electronics has been characterized with six Topmetal-M pixel sensors to evaluate the system-level performance. The noise of all the six pixel sesors is between 78.2 e - to 185.2 e -. This paper will discuss the design and performance of the readout electronics.