NSRRC Activity Report 2023

100 NSRRC ACTIVITY REPORT 2023 Fig. 3 : The frame of the automation control system. [Reproduced from Ref. 1] Fig. 4 : The control frame of the gas replacement system. [Reproduced from Ref. 1] The control system of the TLS 07A1 adopts the EPICS server system as an intermediary. Considering that the existing experimental software used is SPEC, which can communicate with the process variables (PVs) of the EPICS server and that the Australian Synchrotron encapsulates the driver interface of Galil motor controllers into modules within EPICS, installing the Galil motor controller module and related accessories allows the configuration of EPICS parameters based on the chosen motors and screws. This setup provides process variables to users. Ultimately, communication with the industrial computer is achieved through Ethernet interfaces to complete motor control. In electrical control hardware, a multi-axis motion controller can output pulse signals to stepper motor drivers to control motor motion. The TLS 07A1 utilizes a multi-axis motion controller card (Galil DMC-4080), which can simultaneously control eight motor drivers and relative encoders. This approach is particularly convenient for scenarios requiring the control of multiple-axis motors. Additionally, the controller provides sixteen digital output and input channels, as well as eight 12-bit analogy input channels, facilitating the use of digital output/input signals by electromechanical control personnel for controlling solenoid valves or reading the signals of limit switches. When conducting experiments using XAS or XRD, the gas proportions inside the Io, Ir, or It chambers need to be adjusted according to the different types of samples. When there is a need to readjust the gas inside the chambers due to a sample change, the automated ventilation system of the TLS 07A1 uses electromagnetic valve switches before pumping to remove the original gas from the chambers. After achieving the desired vacuum state inside the chambers (as confirmed by the pressure gauge), the system uses a flow meter to reintroduce the required gas proportions. The control system of the gas replacement