%info@http:://golem.fjfi.cvut.cz/wiki/root/GW4reports


\def\TRAICInstructions{
\begin{figure}[ht]
  \centering
\includegraphics[width=\linewidth]{ExperimentalScheme/drawing.pdf}
	\caption{Experimental set-up: schematic of the GOLEM tokamak with its various sub-systems.}
	\label{fig:expsetup}
\end{figure}
The experiment is composed of the following fundamental sub-systems (see Fig. \ref{fig:expsetup}):
\begin{itemize}
\item Circuit for the generation of the toroidal magnetic field $B_t$ consisting of
  a capacitor bank ($C_B = 81$ mF) charged up to $U_{B}=1300$ V (recommended value in the $<800,1000>$ V range). The capacitor bank is
  discharged by a computer-controlled thyristor into a set of 28 magnetic field coils
  which generate a toroidal magnetic field up to $B_t\approx 0.8$ T in the
  vacuum vessel.
\item  Circuit for the generation of the toroidal electric field $E_t$  ($C_{CD}
  = 11.3$ mF , $U_{CD} \le 700$ V, recommended value:$<400,600>$ V ).  The capacitor bank is discharged by a
  computer-controlled thyristors into the primary winding of the transformer. The time
  delay with respect to the magnetic field $T_{CD}$) can be selected  independently. 
\item Triggering system, allowing to set-up the time delay between the triggers of the toroidal magnetic and electric fields ($T_{CD}$), range: $0-20000 \;\rm \mu s$ (recommended value in the $<0,10000>\mu s$  range). .
\item Pre-ionization of the working gas is performed by an electron gun (heated tungsten filament).
\item Vacuum system, which allows reaching the background pressure in the vacuum
  vessel $\approx 0.2$ mPa. 
\item Gas handling system (again computer controlled) to control the pressure of the working gas (hydrogen) in the vessel in the range of $p_{H_2}$   $\approx$  0 - 50 mPa, with recommended value in the $<15,40>$ mPa range). .
\end{itemize}
}