Abstract
HIRFL-CSR, a new accelerator project planned at the Heavy Ion Research Facility in Lanzhou (HIRFL), has been started in December 1999. The average static pressure for the ultra-high vacuum system of HIRFL-CSR will be 3×10 −9 Pa. To achieve this goal, much research and many experiments have been done. As a result, the first prototype of the vacuum system has been finished. The pressures near the pump and at the end of the chamber (about 4 m away from the pump) were 8×10 −10 and 2.6×10 −9 Pa, respectively. This paper describes the process of the design, manufacture and test on the prototype. It is focused on the chamber structure design, machining technology, calculation and testing for the main pumps, and design of the bake-out system. Future development of the vacuum system is also mentioned.
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