Thomson scattering diagnostic data acquisition systems for modern fusion systems

Uniquely designed complex data acquisition system for Thomson scattering diagnostic was developed. It allows recording short duration (3-5 ns) scattered pulses with 2GHz sampling rate and 10-bit total resolution. The system consists up to 48 photo detector modules with 0-200MHz bandwidth, 1-48 simultaneously sampling ADC modules and synchronization subsystem. The photo detector modules are based on avalanche photodiodes and ultra-low noise transimpedance amplifiers. ADC modules include fast analog to digital convertors and digital units based on the Field-Programmable Gate Array for data processing and storage. The synchronization subsystem is used to form triggering pulses and to organize the simultaneously mode of ADC modules operation.