Ual-based Simulation Environment for Spallation Neutron Source Ring

The Unified Accelerator Libraries[1] are designed as a customizable and extendible environment for developing diverse accelerator applications. Its main architectural principle is a separation of physical entities and mathematical abstractions from algorithms. The accelerator algorithms are implemented as classes that share data via Common Accelerator Objects (Element, Bunch, Twiss, etc.). This highly flexible structure has facilitated selecting and implementing more appropriate software design patterns and accelerator approaches, supporting project-specific requirements, and connecting the UAL applications with heterogeneous data sources. At this time, the UAL joins several object-oriented accelerator programs: PAC (Platform for Accelerator Codes), TEAPOT (Thin Element Program for Optics and Tracking), ZLIB (a numerical library for differential algebra), and ALE (Accelerator Libraries’ Extensions). The Application Programming Interface (API), written in Perl, provides a universal homogeneous shell for integrating and managing all these components and project extensions. The UAL environment has been successfully applied to several accelerator projects: LHC, RHIC, and CESR. This paper outlines the major activities and applications for the new project, Spallation Neutron Source (SNS) Ring.