Author Info

David Guo, STARFollow


Glass can be very fragile, and many techniques have appeared to try to resolve this problem. One technique that has been developed to fortify glass is the depositing of metal atoms into the glass. The specific term for this technique is called “doping.” By combining different metals at different composition ratios, different levels of glass fortifications can be achieved. A pump-probe is applied to the glass which expands and contracts. By shooting electrons at the glass films, an electron diffraction pattern is achieved which contains data from the contraction and expansion of the glass film. This is where this poster comes into play, with the goal in mind of finding a way to properly analyze this data. The data collected from the diffraction pattern was first converted to an image file using a python code. Afterwards, the image is then used to find the center of the ring that comes from the diffraction pattern. That would then generate a graph that provides us a data point to determine if the glass film is contracting or expanding. Several different attempts have been made to interpret the data, but have not been able to successfully determine the center of the ring accurately. The problem comes from manually trying to locate the center of the ring by choosing points in the ring to produce an artificial circle. The artificial ring’s center is then used to represent or approximate the ring’s center. However, due to human limitations, the center of the ring is deemed to be different almost every time, hence there is too much inconsistency to the data. The next goal is to find an alternative way to determine the ring’s center.


Physical Sciences and Mathematics


Juhao Wu

Lab site

SLAC National Accelerator Laboratory (SLAC)

Funding Acknowledgement

This material is based upon work supported by the S.D. Bechtel Jr. Foundation and is made possible with contributions from the National Science Foundation under Grant No. 1340110, Howard Hughes Medical Institute, Chevron Corporation, National Marine Sanctuary Foundation, and from the host research center. Any opinions, findings, and conclusions or recommendations expressed in this material are solely those of the authors. The STAR Program is administered by the Cal Poly Center for Excellence in STEM Education on behalf of the California State University system.





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