Speaker
Description
ITN (ILC Technology Network) is an international framework for carrying out technology development for the ILC (International Linear Collider). The ITN framework was launched in FY2023 and will continue for five years.
One of the technology development items involves manufacturing, cooling, and RF testing of the cryomodule. A cryogenic system is being developed to supply helium for cooling the cavities, thermal shields, and other thermal anchors.
The existing helium liquefier (Linde LR280) will be used. However, a change in the applicable Japanese regulatory framework is required, from the General High Pressure Gas Safety Rules to the Refrigeration Safety Rules.
The 2 K refrigerator uses the supplied 4.5 K liquid helium to provide superfluid helium at 2 K. It will be directly connected to the cryomodule under test. KEK has experience operating 2 K refrigerators at STF and cERL, and the basic configuration of the new system is based on these existing systems.
The liquefier and 2 K refrigerator will be connected by approximately 100 m of vacuum-insulated transfer lines. The transfer lines have been prepared in 4-m sections and will be installed next year.
The preparation status of the other components will also be presented.
This work was supported by [MEXT Development of key element technologies to improve the performance of future accelerators Program], Japan Grant Number JPMXP1423812204.