STATUS OF CRYOGENIC SYSTEM FOR SPALLATION NEUTRON SOURCE'S SUPERCONDUCTING RADIOFREQUENCY TEST FACILITY AT OAK RIDGE NATIONAL LAB

摘要

The Spallation Neutron Source (SNS) at Oak Ridge National Lab (ORNL) is building an independent cryogenic system for its Superconducting Radiofrequency Test Facility (SRFTF). The system will provide refrigeration for the SNS cryomodule test and cavity test at both 2K (using vacuum pumped helium) and 4.5K for the maintenance purposes and the Power Upgrade Project of SNS. It will also provide the part of the cooling power needed to backup the existing CHL to keep the Linac at 4.5K during CHL future maintenance periods. The system will be constructed in multiple phases. The first phase is to construct an independent 4.5K helium refrigeration system with a helium Dewar and distribution box as the load interface. It is scheduled to be commissioned in 2013. Here we report on the design concept for the system and the status of the first phase of this project.