PROGRESS OF CONSTRUCTION OF THE TPS VACUUM SYSTEM

The construction of a vacuum system for the 3-GeV Taiwan Photon Source (TPS) was begun in 2010. The critical components such as bellows and gate valves with rf-contact shielding, pulsed magnet-kicker ceramic chambers, BPM, crotch absorbers etc. have been manufactured and tested. Aluminium-alloy (Al) vacuum chambers for the arc-cells have been machined and are undergoing welding in house. Mass production of vacuum equipment including ion gauges, ion pumps, NEG pumps and gate valves, has been contracted, with partial delivery following the schedule of the cell assembly. Assembly of each cell that contains two short Al straight chambers and two Al bending chambers has begun, and assembly and welding of the pre-aligned girders in a clean room on site to form a one-piece vacuum vessel of length about 14 m followed by baking under ultra-high vacuum are under way. The progress of developing a prototype and the status of construction of the TPS vacuum system are described in this paper.