Conveners
Data Acquisition and signal processing 1
- Hideya Nakanishi (National Institute for Fusion Science)
Tokamak scenarios are governed by actuator actions that can be either pre-programmed in feedforward or requested by feedback controllers based on actual plasma state. Actions requested by feedback controller have the advantage that they can react on unpredictable events that happen in the system. On the other hand, the reaction comes always with a delay. For that reason, it is required to...
After the 2020 campaign, EAST (Experimental Advanced Superconducting Tokamak) facility carried out maintenance. EAST data acquisition system（EAST DAQ）, which is responsible for the unified diagnostic data acquisition and long-term data storage, also has been upgraded. This article will present an overview of the upgrade data acquisition system. About 20 diagnostic systems and some other...
The driving, implosion and combustion processes of laser fusion take place in a very short time and a very small space scale, resulting in transient extremely high temperature and high density plasma environment. Plasma diagnosis is an important means to observe the physical phenomena in laser fusion process and obtain the parameters of extreme physical states. The object of laser inertial...
Software integration of multiple data acquisition and timing hardware devices in Instrumentation and Control and diagnostics applications for fusion environments is very challenging. This is especially relevant for ITER, where the instrumentation is mostly composed of COTS hardware. While the implementation should manage multiple hardware devices from different manufacturers providing...
In recent years, a new tomographic inversion method, based on the Maximum Likelihood (ML) approach, has been adapted to JET bolometry. In addition to its accuracy and reliability, the key advantage of this approach consists of its ability to provide reliable estimates of the uncertainties in the reconstructions. The original algorithm has been implemented and validated using the MATLAB...
The operation of fusion devices produces huge amounts of data with high dimensionality that allows developing sophisticated machine learning models to tackle specific problems. In such high-dimensional data space, the feature selection plays an important role to extract useful information.
A high number of features in the data requires dimensionality-reduction techniques before the...
Control, Data Acquisition and Communication (CODAC) real-time software are essential for fusion device operation, machine protection and for the optimization of plasma experiments. In 2019, following the WEST project (W -for tungsten- Environment Steady-state Tokamak) upgrade, a major migration of the inter-process message transport infrastructure has been initiated.
Originally, on Tore...
