Speaker
Description
This paper presents a case study on the reinstallation of heavy weight cryomodule (HWR-B #11, HWR-A #9 & #13) for the SCL3 beamline maintenance. Our HWR-B combines a cryogenic module with a warm section assembled with a quadrupole magnet and a vacuum chamber, with a total weight exceeding 12.5 tons (HWR-A over 7.0 tons). After each annual beam commissioning, some low-efficiency modules were identified to require functional inspection and repair during maintenance for subsequent beam experiments.
In particular, the processes of disassembling a large HWR-B or HWR-A cryomodule from the beamline and moving it out of the underground accelerator tunnel needs very strict safety requirements and detailed planning and coordination among related systems and teams. To perform these tasks efficiently and safely, we prepared pre-designed tools and equipment, formed related work groups for collaboration. During the first stage of the maintenance procedure, the HWR-A/B cryomodules was safely removed from the SCL3 beamline using a specially designed moving wheel and then delivered to the contractor for overhaul. After the overhaul & test were completed, the HWR-B #11 cryomodule was returned to the SCL3 tunnel and reinstalled into its original position in the beamline using the dedicated moving wheels and hydraulics. With great effort and attention, This first in-house beamline maintenance experience provided valuable insight and expertise for the ongoing operation of an accelerator beamline.
| Paper status | Proceeding files received |
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