An open software framework for advancement of x-ray optics simulation and modeling

Abstract

Accurate physical-optics based simulation of emission, transport and use in experiments of fully-and partially-coherent X-ray radiation is essential for both designers and users of experiments at state-of-the-art light sources: low-emittance storage rings, energy-recovery linacs and free-electron lasers. To be useful for different applications, the simulations must include accurate physical models for the processes of emission, for the structures of X-ray optical elements, interaction of the radiation with samples, and propagation of scattered X-rays to a detector. Based on the "Synchrotron Radiation Workshop" (SRW) open source computer code, we are developing a simulation framework, including a graphical user interface, web interface for client-server simulations, data format for wave-optics based representation of partially-coherent X-ray radiation, and a dictionary for universal description of optical elements. Also, we are evaluating formats for sample and experimental data representation for different types of experiments and processing. The simulation framework will facilitate start-to-end simulations by different computer codes complementary to SRW, for example GENESIS and FAST codes for simulating self-amplified spontaneous emission, SHADOW and McXtrace geometrical ray-tracing codes, as well as codes for simulation of interaction of radiation with matter and data processing in experiments exploiting coherence of radiation. The development of the new framework is building on components developed for the Python-based RadTrack software, which is designed for loose coupling of multiple electron and radiation codes to enable sophisticated workflows. We are exploring opportunities for collaboration with teams pursuing similar developments at European Synchrotron Radiation Facility and the European XFEL.

Recent developments to the Radia magnetostatics code for improved performance and interface

“…Each code has a particular interface designed to meet the specific applications it addresses. Sirepo currently supports a variety of scientific codes and applications related to particle accelerator modeling such as: Synchrotron Radiation Workshop (SRW) [3,4], elegant [5], and Radia. The Radia Sirepo application allows users to create magnet designs, calculate fields and visualize the results of Radia calculations in a convenient web-based graphical interface.…”

Recent updates in the “Synchrotron Radiation Workshop” code, on-going developments, simulation activities, and plans for the future

“…It has been decided that GUI(s) will be part(s) of one or several "frameworks" [35][36][37] that are planned to include, besides SRW, other X-ray optical simulations codes, in particular the popular SHADOW 38 geometrical ray-tracing program, and "bridge" them by common definition of sources, optical elements, and formats for data exchange. Besides the "local" client-side GUIs, the "frameworks" are planned to support server-side processing with "light-weight" web-based interfaces.…”

“…The work in this direction is currently in progress in collaboration with different groups. [35][36][37] …”

WavePropaGator: interactive framework for X-ray free-electron laser optics design and simulations

“…In addition, we plan for the WPG to support full interoperation with a new framework, based on client-server architecture and using JavaScript and Python for a rich graphical user interface. This is currently under development in a project (Bruhwiler et al, 2014) sponsored by the US Department of Energy.…”