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Figure 3.2: TSDC cell.
3.3 Main Chamber
The main chamber is the main structure of the system. It plays the roles of supporting
TSDC cell, providing enclosed environment for experiment, and connecting to other component
of system. The main chamber is made by 304 stainless steel, which makes the main chamber
have uniform geometry shape under extreme low and high temperature environment [19]. 3D
model of chamber designed by Pro/Engineering software and real chamber view are shown in
figure 3.3. Figure 3.4 shows the dimension of the chamber. There are totally seven ports on the
chamber. Table 3.1 shows the function for each port. All the ports of main chamber are designed
to standard 2-3/4"UHV flange. By using standard flange adapter from Lesker Company: 23/4"UHV FLANGE TO QF25, every function units can be easily connected to main chamber.
What is more, to make sure main chamber has a perfect sealing performance, each
connection between accessories parts and main chamber was sealed by an O-ring. To make the
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