Abstract
This paper presents the data acquisition system for GEM-detector (Sauli in Nucl Instrum Methods Phys Res Sect A Accel Spectrom Detect Assoc Equip 386(2–3): 531–534, 1997. https://doi.org/10.1016/S0168-9002(96)01172-2) based cameras and spectrometers (Chernyshova et al. in Fusion Eng Des, 2017. https://doi.org/10.1016/j.fusengdes.2017.03.107). The system is modular (Czarski et al. in Rev Sci Instrum 87(11): 11E336, 2016. https://doi.org/10.1063/1.4961559) and supports 1D and 2D GEM arrays with software-defined readout modes. Channel count can vary from 8 up to hundreds. The readout electronics consists of two units—radiation tolerant Analog Front End and rack-mount data processing unit. Data processing is split into two parts—real-time hardware, based on FPGA and software, based on embedded multicore CPUs and hardware accelerators. The FPGA subsystem together with PCIe interface and multi-core Xeon processors forms low latency, high-performance processing chain suitable for applications requiring feedback. The detectors in tokamaks operate in the high magnetic field, so the system was equipped with multipoint magnetic field measurement synchronized with detector readout. The system also includes custom HV supply, developed for triple GEM detectors operating in the high-rate mode. Dedicated protection and diagnostic subsystems were developed as well to ensure safe and reliable operation of the detector in harsh conditions. To support the operation of the detector in the high-temperature surrounding, the liquid cooling subsystem was developed (Wojenski et al. in J Instrum 11(11): C11035, 2016).
Highlights
Precise estimation of soft X-ray distribution of plasma in future research tokamak reactors will be a key factor in plasma parameter optimization
The generation system based on MTCA [1] platform is presented
16 channel ADC boards they convert the voltage to the digital value and transfer the result using differential high-speed LVDS lanes to the FPGA
Summary
Precise estimation of soft X-ray distribution of plasma in future research tokamak reactors will be a key factor in plasma parameter optimization. To support the operation of the detector in the high-temperature surrounding, the liquid cooling subsystem was developed (Wojenski et al in J Instrum 11(11): C11035, 2016). (AFE) channels, ADC modules, FPGA backplane, Data Concentrator Board and computer subsystem. 16 channel AFE boards they convert the charge into the voltage that is transferred using a symmetrical cable do the ADC modules.
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