ISAC‐II is an upgrade of the ISAC radioactive‐beam facility that includes the addition of a ∼ 40 MV heavy‐ion superconducting accelerator. This accelerator consists of five medium‐beta cryomodules. Each cryomodule is comprised of four superconducting quarter‐wave cavities and one superconducting solenoid magnet. The cryomodule has an inventory of 190 liters of liquid helium at 4.5 K that is constantly replenished from the refrigeration system during normal operating conditions. The first cryomodule has been assembled and fully characterized during the cold tests, including a cool down with ISAC‐II LINDE helium refrigerator in the final SC‐linac location. The beam injected from ISAC‐I was successfully accelerated with the cryomodule. This confirmed the validity of the overall design. Also, the second cryomodule was cooled down with cryogenic performance similar to the first cryomodule. The results of the cold tests are presented.

Topics
Superconductivity, Superfluids, Helium refrigerator, Electromagnetic coils, Particle accelerators, Particle beams, Educational assessment
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© 2006 American Institute of Physics.
2006
American Institute of Physics
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