Data Acquisition and  Control System

The RIXS endstation at Beamline TPS 41A employs a three-layer control architecture consisting of:

1. Direct hardware control of commercial motion and detector devices

2. Intermediate synchronization and group control software

3. User-level commands and graphical interface tools were developed in-house using Fortran and Python.

Communication across all layers is implemented using the EPICS framework, ensuring stable and coordinated operation of beamline optics, spectrometer components, and sample environments.

The user interface provides four main display panels:

• Real-time two-dimensional RIXS detector images

• Experimental parameters (incident energy, spectrometer energy, optical positions, scattering angles, photon flux, temperature)

• Command history and system logs

• Processed one-dimensional spectra and scan results

This structure enables real-time visualization, efficient scan control, and high-resolution spectroscopic data acquisition.

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