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Revision 1.3 by lino, Wed Jan 28 15:08:27 2009 UTC vs.
Revision 1.4 by sguazz, Mon Mar 9 15:41:05 2009 UTC

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1 + \section{TIB and TID layout}
2 +
3 + TIB and TID are very compact objects with high readout granularity;
4 + channel and module densities are three to four times larger than in
5 + the other SST subsystems as shown in Table~\ref{table:Density} where
6 + the main parameters of the SST subsystems are
7 + reported. The TIB and TID layout has been designed matching the
8 + following features: simple mechanical structure; easy routing of the
9 + large number of service connections (cooling, readout, controls); easy
10 + component mounting in the case of the TIB non-planar (cylindrical)
11 + geometry; optimization the theta (and phi?) for the TID.
12 +
13 + The TIB is structured in four concentric layers. Each layer is
14 + split along the vertical plane at $z=0$ into two almost identical half-layers. Each
15 + half-layer is further split along the horizontal at $y=0$ into two semi-cylindrical
16 + structures, also referred to as ``shells''. The shell structure is a
17 + semi-cylindrical carbon fiber assembly strenghten by two circular
18 + flanges at both ends. Modules and services are hold either on
19 + the external and the internal surfaces. The services are laid down on
20 + the surface and run parallel to the $z$ axis.
21 + % on the surface toward the end (i.e. in the
22 + %direction along which $|z|$ increases).
23 + The modules and the related
24 + services that sit on the same side of a shell at the same $\phi$
25 + coordinate constitute a \textit{string}.
26 +
27 + The TID is split into six disks (three per each side of
28 + TIB). The disk is made up by three sub-disks called "rings" since each
29 + ring holds modules at the same radius. The ring structure consists of
30 + a mechanical support made of an annular carbon fiber honeycomb,
31 + hosting modules and services on both sides to decrease the density
32 + and therefore providing a better accessibility during ring integration
33 + and  disk assembly.
34 +
35 + As a result of the above described structure the TIB/TID system is
36 + divided into two physically separated structures, one located in the
37 + $z > 0$ region and one located in the $z < 0$ region and known as
38 + TIB/TID+ and TIB/TID- respectively. Each TID+ and TID- is obtained by
39 + inserting, positioning and fixing each disk into a carbon fiber
40 + cylinder called {\it Service Cylinder}. Each Service Cylinder has
41 + several holes at the position of disk, in order to allow the
42 + connection of the power lines and to route out all the fibers of the
43 + disk. The Service Cylinder is also used to connect mechanically TIB+/-
44 + and TID+/-, and to route out the services of the TIB and of the TID.
45 +
46 + The cooling in the TIB/TID is distributed via aluminum pipe circuits  
47 + that  are bent into loops and soldered to inlet/outlet manifolds at
48 + the flange for the TIB, and at the ring outer edge for the TID.
49 + The thermal connection between pipes and sensor modules is made with Aluminum ledges which are
50 + precisely glued on the carbon fiber support structure and in good thermal contact with the pipes.
51 + On each ledge there are two threaded M1 holes onto which the modules are tightened.
52 + Precisely drilled slots, coaxial with the threaded holes, are the reference point where
53 + insets are stick in providing mechanical reference for modules. An example for a TIB module
54 + is shown in Fig.~\ref{fig:module_cooling}).
55 +
56 + The TIB and TID substructures, 16 shells and 18 rings, are relatively
57 + large-sized: shells hold 135 to 216 modules, rings hold 40 to 48 modules.
58 + Some other relevant specifications of the TIB and TID substructures are
59 + summarized in Table~\ref{table:layers}.
60 + A finished half of the TIB and a TID Disk are shown in
61 + Fig.~\ref{fig:tibtid}. The pictures allow the sub-structures to be
62 + recognized.
63 +
64 +
65 +
66 + \begin{figure}[!htb]
67 + \begin{center}
68 +  \includegraphics[width=0.45\textwidth]{Figs/shell.pdf}
69 + %  \includegraphics[height=0.5\textwidth]{Figs/TIB-assembled.pdf}
70 +  \hskip 1cm
71 +  \includegraphics[width=0.45\textwidth]{Figs/TIB_barrel.png}
72 + \end{center}
73 + \caption{A L3 TIB shell (left panel) and half of TIB assembled (right panel).}
74 + \label{fig:tib}       % Give a unique label
75 + \end{figure}
76 +
77 + \begin{figure}[!htb]
78 + \begin{center}
79 +  \includegraphics[height=0.35\textwidth]{Figs/ring.pdf}
80 + %  \includegraphics[height=0.5\textwidth]{Figs/TIB-assembled.pdf}
81 +  \hskip 3cm
82 +  \includegraphics[height=0.35\textwidth]{Figs/TID-disk.pdf}
83 + \end{center}
84 + \caption{A R1 TID ting assembled (left panel) and one TID disk (right panel).}
85 + \label{fig:tid}       % Give a unique label
86 + \end{figure}
87 +
88 +
89 + \begin{table}[!htb]
90 + \begin{center}
91 + %\begin{tabular}{|l||c|c|c|c|c|c|c|}
92 + \caption[smallcaption]{Total number of modules, strips (or electronic readout channels), detector volume and
93 + channel density for the different tracker subsystems. Service access area is also defined
94 + for barrel geometry detectors (TIB and TOB) as their flange area. The channel density in this
95 + area gives also an idea of the complexity of the detector integration.}
96 + \label{table:Density}
97 + \begin{tabular}{|l|ccccccc|}
98 + \hline
99 + &         &          &        & Module   & Channel                    & Service  & Service              \\
100 + & \# of   &\# of     & Volume & Density   & Density                    & Area & Density             \\
101 + & modules & channels & [m$^3$]& [$\times 10^3$  m$^{-3}$] & [$\times 10^6$ ch m$^{-3}$] & [m$^2$] &  [$\times 10^6$ ch m$^{-2}$]\\
102 + %\hline
103 + \hline
104 + TIB & 2724 & 1 787 904 & 0.82 & 3.2 &  2.2 & 1.6 & 1.11\\
105 + %\hline
106 + TID & 816 & 565 248 & 0.5 & 1.6  & 1.1  & & \\
107 + %\hline
108 + TOB & 5208 & 3 096 576 & 5.9 & 0.89  & 0.52 & 5.7 & 0.54\\
109 + %\hline
110 + TEC & 6400 & 3 866 624 & 11 & 0.58 & 0.35  & & \\
111 + \hline
112 + \end{tabular}
113 + \end{center}
114 + \end{table}
115 +
116 +
117 + \begin{table}[!htb]
118 + \begin{center}
119 + \caption[smallcaption]{Details on the different layers/rings of the TIB/TID. }
120 + \label{table:layers}
121 + %\begin{tabular}{|l||c|c|c|c|c|c|c|}
122 + \begin{tabular}{|l|ccccccc|}
123 + \hline
124 + Layer & \# mechanical & \# cooling  &  DS/SS & \# of modules  & \# of channels & \# Control & \# Mother  \\  
125 +       &   structures  &  circuits    &  layer &  total         & per module         &  Rings     &  Cables  \\
126 + \hline
127 + % \hline
128 + TIB L1  & 4 shells &    & DS & & & &  \\
129 + TIB L2  & 4 shells &    & DS & & & &  \\
130 + TIB L3  & 4 shells &    & SS & & & &  \\
131 + TIB L4  & 4 shells &    & SS & & & &  \\
132 + TID R1  & 6 rings  & 24 & DS & 288 & 768 & 12 & 48 \\
133 + TID R2  & 6 rings  & 24 & DS & 288 & 768 & 12 & 48 \\
134 + TID R3  & 6 rings  & 24 & SS & 240 & 512 & 12 & 48 \\
135 + \hline
136 + \end{tabular}
137 + \end{center}
138 + \end{table}
139 +
140 +
141 + %\subsection{Mechanical Structures}
142 +
143 + %A TIB shell is shown on Fig.~\ref{fig:tibshell}).
144 +
145 + %Each cooling loop hosts three modules placed in a straight row, which is called a
146 + %A string of modules is connected to the same CCU, thus forming a control branch.
147 +
148 + %\begin{figure}
149 + %\centering
150 + %\includegraphics[width=\textwidth]{   }
151 + %\caption{TIB shell: are visible the internal and external parts, the cooling pipes and the string}
152 + %\label{fig:tibshell}
153 + %\end{figure}
154 +
155 +
156 + %\begin{figure}
157 + %\centering
158 + %\includegraphics[width=\textwidth]{   }
159 + %\caption{TID ring }
160 + %\label{fig:tidring}
161 + %\end{figure}
162 +
163 +
164 +
165 + \begin{figure}
166 + \centering
167 + \includegraphics[width=0.6\textwidth]{Figs/module_cooling.pdf}
168 + \caption{Module Cooling.
169 + \textbf{Upper picture:} a whole cooling loop with six ledges to hold three modules and three
170 + smaller ledges to hold Analog Opto-Hybrids (two more cooling loops are partially visible).
171 + \textbf{Lower picture:} a detail of a cooling loop. The cooling fluid direction
172 + is evidenced with blue arrows, and the precision insets for module insertion are circled in
173 + red. A module mounted on the nearby position is also visible.}
174 + \label{fig:module_cooling}
175 + \end{figure}

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