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The vacuum group of NSRRC developed a task-oriented chatbot application based on LINE message platform in 2018. LINE message is a cross-platform communication software that can be easily used on mobile phone, tablets, and PC. This interactive user interface can not only reply the real-time status of sub-systems when the user has a query but also proactively report alert. The TPS cryogenic system also introduces this application which like a virtual assistant to help cryogenic engineer management system more efficiency. In this paper we present the configuration and operation of this task-oriented chatbot application for cryogenic system.

A small RMS phase error and long-term stability of the gap-drive system are important criteria for realizing high performance undulators. The use of force compensating spring modules of self-contained type move toward the goals. Since magnetic forces from girders are vanished entirely at the spring module, so not only the small systematic phase error derived from deformation of the girders but also the small dynamic loadings on the mechanical frame and gap-drive system. Moreover, spring modules provide a supplemental mechanism to correct magnetic field errors at varied gaps. Such mechanism is particular benefit for the cryogenic permanent magnet undulators because the field errors of undulator shall correct in both cryogenic mode and room temperature mode.