| 2 |
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\label{sec:Grounding} |
| 3 |
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The grounding scheme followed during the TIB integration is scketched in Fig. \ref{fig:grounding}, |
| 4 |
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for an more complete description see~\cite{ref:grounding}. |
| 5 |
< |
The high and low voltage return lines are joined together at the mother cable head, then this |
| 6 |
< |
point, for all the strings in the shell, is connect to a gold plated copper sheet fixed to the |
| 5 |
> |
The high and low voltage return lines of each string |
| 6 |
> |
are joined together at the mother cable head, then this |
| 7 |
> |
point is connect to a gold plated copper sheet (called {\it corona}) fixed to the |
| 8 |
|
shell front flange. This sheet has been introduced to have a better quality soldering connections |
| 9 |
< |
with respect to the cooling manifolds but it is equipotential to them. \\ |
| 9 |
> |
with respect to the aluminum cooling manifolds but it is equipotential to them. \\ |
| 10 |
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Other important ground connections are at the single module level. On the front-end hybrids |
| 11 |
|
of all the single sided modules and on the R-Phi double sided ones, a small |
| 12 |
< |
gold plated copper pin (called "cometa") is soldered on the low voltage common return, |
| 12 |
> |
gold plated copper pin (called {\it cometa}) is soldered on the low voltage common return, |
| 13 |
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at the filtering capacitor level, and |
| 14 |
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it is forced in contact with the module carbon fiber frame. In such a way the module frame is |
| 15 |
< |
properly grounded resulting in a flat, expecially for the first and last strip of |
| 15 |
< |
each APV25, strip noise profile. |
| 15 |
> |
properly grounded resulting in a flat strip noise profile. |
| 16 |
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Furthermore a connection has been done between the front-end hybrid return of end-flange side |
| 17 |
|
module and the cooling pipe close to it.\\ |
| 18 |
< |
The DOHM return and its shielding have been also connected to the cooling manifolds. The DOHM |
| 18 |
> |
The DOHM return and its shielding have been also connected to the {\it corona}. The DOHM |
| 19 |
|
return is also in contact with the mother cable return via the control cable ground lines. |
| 20 |
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|
| 21 |
< |
\begin{figure} |
| 22 |
< |
\begin{center} |
| 23 |
< |
\includegraphics[width=0.85\textwidth]{Figs/grounding.pdf} |
| 24 |
< |
\end{center} |
| 25 |
< |
\caption{Scheme of the TIB shell grounding.} |
| 26 |
< |
\label{fig:grounding} |
| 27 |
< |
\end{figure} |
| 21 |
> |
%\begin{figure} |
| 22 |
> |
%\begin{center} |
| 23 |
> |
% \includegraphics[width=0.85\textwidth]{Figs/grounding.pdf} |
| 24 |
> |
%\end{center} |
| 25 |
> |
%\caption{Scheme of the TIB shell grounding.} |
| 26 |
> |
%\label{fig:grounding} |
| 27 |
> |
%\end{figure} |
| 28 |
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|
| 29 |
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|
| 30 |
|
\begin{figure} |
