Abstract
The straight vacuum chambers (S-chamber) of the SRRC 1.3 GeV electron storage ring are designed, fabricated and tested. Vacuum pipes, bellows, flanges, pumping ports and most of the other components are made of aluminum. The S-chambers are designed to have the function of reducing radio-frequency ( rf) impedance and removing the heat created by synchrotron radiation. A stringent tungsten-inert gas (TIG) welding process is performed to minimize the deformations in both longitudinal and transverse directions. In order to achieve uhv, in situ bakeout by tape heaters is adopted. The testing results showed that the designs for removing the baking-related problems work well.
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