Tiaoqin Yu

Applying virtual prototyping to the innovative design of low energy accelerators

Based on the accelerator theory and virtual prototyping technique, an accelerator virtual prototyping system (AVPS) is formulated, implemented for the innovative design of low energy accelerators. The framework of AVPS takes into account the needs of manufacture, assembly/disassembly, operation, and maintenance in a virtual environment during the design phase. In order to guarantee the reliability of AVPS, Augmented Reality (AR) technique is used to integrate the virtual environment and experimental subsystem. Common Object Request Broker Architecture (CORBA) middleware for distributed, object-oriented applications is used to develop and implement the framework. The main components of AVPS include AR subsystem, distributed computing environment and data warehouse.

A framework design for a cyclotron virtual control platform based on object-oriented methodology

This paper introduces a new software solution for cyclotron control system design and validation that named Cyclotron Virtual Control Platform (CVCP) and gives implementations in framework design. This software platform has abilities to simulate the processes and conditions in normal cyclotrons such as start up and shut down, routine operations, beam current regulation with combination of built-in component models and sequential control logic. A Human Machine Interface (HMI) with Supervisory Control and Data Acquisition (SCADA) functions and 3D interaction features provides a good operation channel. And an intelligent fault diagnosis module that can both generate errors and give solutions will be integrated into the platform in further plans. We use Object-Oriented technology to build this complex system and represent it in Unified Modeling Language (UML). It is easy to extend the functions in this open system. The platform is applied to Cyclotron Virtual Prototyping technology.

A Novel Design of Insulated Core Transformer High Voltage Power Supply

Insulated core transformer (ICT) high voltage power supply is an ideal model for industrial radiation accelerator at energy below 1MeV. Compared to the traditional scheme, a novel ICT high voltage power supply was put forward. Conventional silicon steel sheets were replaced with manganese zinc ferrites, raising working frequency from 50Hz to thousand hertz. Magnetic structure was changed from three-phase structure to four-phase structure. Accordingly, excitation voltage was changed from three-phase sinusoidal wave to square wave. Polyimide was chosen as insulation material instead of teflon or mica. A prototype of 400kV/50mA was designed, simulated and verified with the aid of finite element analysis software. To optimize the voltage distribution, corresponding flux compensation methods were raised to solve the problem of flux leakages.

Modeling and beam dynamic visualization in cyclotron virtual prototyping

Cyclotron virtual prototype improves design quality, reduces the number of costly physical cyclotron prototypes and the time of product development, and delivers innovative new designs faster. This paper describes the overall lifecycle models of cyclotron via CAD system, which can be used in cyclotron virtual design, virtual assemble, virtual manufacture and other relevant domains. The 3-dimension models with physical information help designers in the research of cyclotron construct, and empower designers with the flexibility of parametric or alternative design. This paper introduces applications in virtual assembly and automated modeling and describes particle moving animation and beam dynamic analysis result visualization expression in cyclotron virtual prototyping.

Some R&D for the update project of Beijing Tandem Laboratory

A update project of the Beijing Tandem Laboratory was proposed in 1999. The main part of this project is the construction of a 100 MeV high intensity H/sup c/yclotron. Some R&D for such a cyclotron have been ongoing for two years, e.g. the axial injection line which is able to inject a 5.2 mA DC beam to the central region of the machine recently. In this paper, the progress of R&D for the ISOLs target-source system will also be reported.