| Abstract: |
A procedure for transferring electron beam welding parameters between different machines using the Enhanced Modified Faraday Cup (EMFC) electron beam diagnostic tool is described. Unlike existing qualitative methods based on the transfer of machine settings, this procedure utilizes quantitative measurements of specific beam properties, which determine the size and shape of the beams power density distribution for different welding machines and different welding parameters [1-6]. Operationally, the EMFC system collects the beam through a series of radial slits as the beam is circled over multiple slits in the disk for focused or defocused beam conditions. Once the radial slit data are collected, computer tomography algorithms are used to reconstruct the power density distribution of the beam. Based on this reconstruction the important beam parameters, including measures of the peak power density and the beam distribution, are determined. This presentation will review the EMFC technique, highlighting applications in weld development, weld transfer between facilities, and quality control in production.
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