Speaker
Description
High Energy Photon Source (HEPS) is currently under construction. Prior to the installation of all equipment, tasks such as beam tuning can only be carried out based on the experience of the beamline staff and some mathematical estimations, in an imaginary space. While effective, this approach is not convenient. Here, taking the Low-dimension Structure Probe beamline of HEPS as a prototype, we have combined 3D modeling technology and optical ray tracing calculations, based on Unity engine and EPICS, to construct a three-dimensional virtual beamline. The virtual beamline allows users to have a more intuitive perception of the experimental equipment in conditions closer to real scenarios.
The virtual beamline model is linked to optical element modules in the optical x-ray tracing library. The movable parameters of the optical elements are mapped to EPICS process variables (PVs). By changing the values of the PVs, the state of the optical elements can be modified, thereby utilizing the x-ray tracing library to simulate the beam.. Other experimental equipment, such as a 6-circle diffractometer, the motor displacements can also be mapped to PVs. By changing the values of the PVs, the movement of the equipments can be observed. In conjunction with Unity3D collision detection functionality, this can be used to anticipate the feasibility of experimental plans.
The virtual beamline provides users, beamline scientists, and beamline engineers with a testing environment where experiments can be conducted freely without concerns about damaging instruments or wasting beam time. In the future, more simulation functions for experimental methods can be added to the virtual beamline, enabling simulation and rehearsal of the experimental process. As an effective tool, the communication efficiency between beamline staff and users, as well as the efficiency of experiments, can be greatly improved. If the mapping between the virtual beamline and the real beamline state can be achieved, a digital twin of the synchrotron radiation beamline will also be constructed.
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