2nd International Workshop on Gas Dynamic Trap based Fusion Neutron Source (GDT-FNS)

Diagnostic instrumentation for the next generation of GDT devices

18 Nov 2019, 15:25

20m

Conference Hall (Budker INP)

Contributed Oral GDT: resent results of studies in support of the ALIANCE project GDT: resent results of studies in support of the ALIANCE project

Speaker

Dr Andrej Lizunov (Budker Institute of nuclear physics)

Description

Devices of the GDT type belonging to the next generation are being proposed for a vast range of scientific and technological applications, including fusion neutron sources, hybrid fission-fusion power plants and others. The next step GDT-like system is deemed as a large-scale installation sustaining plasmas with a significant fusion power generation in a stationary or long-pulse regime. The paper describes several new diagnostics and physical data acquisition and processing systems developed in the Budker Institute for forthcoming fusion plasma experiments. The combined diagnostic based on the motional Stark effect and laser induced fluorescence (MSE-LIF) inherits advantages of the spectral and polarimetric MSE versions to measure the magnetic field value and direction. The presented project of the MSE-LIF diagnostic at GDT is close to the final assembling and commissioning. The recently upgraded diagnostic of laser Thomson scattering at GDT has six spatial points for measurements of the electron temperature and density. The scattered light is analyzed by filter spectrometers of the innovative design using time-stretch digitizers. The planned second phase of the diagnostic enhancement is installation of the multi-pulse Nd:YAG laser for a sub-millisecond time resolution in every plasma shot. The paper discusses the development of series of data acquisition and analysis electronic devices for physical experiments. The instruments range from the compact isolated ADC with the optical fiber data link to the complete data collection and processing system for the vertical neutron camera (VNC) for the ITER project and similar large-scale machines with high radiation conditions.