A comprehensive database of TJ-II signals and diagnostics for statistically based models

Starting in 1997, the stellarator TJ-II has produced valuable scientific data crucial in the study of plasma physics and confinement. In this work, we present a stand-alone, comprehensive database that focuses on the statistical value of the TJ-II data. For this purpose, and comprising 4800 discharges, all the signals and parameters required to characterise the device before a discharge, and the diagnostics that better describe the produced plasma have been included in a database. All these different signals have been curated according to the needs of each signal and synchronised into a unified time frame of interest of 1 ms. Thus, this paper and the presented database fulfil two objectives: an introduction to several TJ-II key signals and diagnostics and a common framework for future works that rely on a strong, statistically tested database, such as the creation of models based on machine learning or data simulations. • We present a curated database for statistically based models for TJ-II. • The database includes all operational inputs and diagnostics for plasma study. • Signals from all instruments were synchronised to a common 1 ms time interval. • All the signals and parameters have been curated according to the responsible team. • Additional tools identify signal similarities across multiple discharges.