PBFA-II Insulator Stack Design from an Engineering Viewpoint

摘要

The mechanical design criteria and design solution for the 3.7 meter diameter PBFA-II vacuum insulator stack are complete. The most fundamental decision was to design a modular insulator stack interchangeable at both the module level and at the module component level. Furthermore, module physical symmetry was designed into the stack so that adjacent modules can be oriented anode-to-cathode or anode-to-anode without any module disassembly. This feature provides an easy way to reconfigure the accelerator for different voltages at the insulator stack. Dynamic response and structural stability for both static and shock loadings were identified as problem areas which required design solutions. The physical size and quality requirements of the insulator stack components were balanced against available vendor fabrication and production rate capabilities and against available Sandia assembly resources to decide the strategy to use for manufacture. (ERA citation 10:035774)