| 2 |
|
\label{sec:Grounding} |
| 3 |
|
The grounding scheme followed during the TIB integration is scketched in Fig. \ref{fig:grounding}, |
| 4 |
|
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 |
|
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, |
| 13 |
|
at the filtering capacitor level, and |
| 14 |
|
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 |
|
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 |
|
|
| 21 |
|
%\begin{figure} |
