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2017.06.01 学术报告 Development of low-cost fast-timing microchannel plate photodetector

时间:2017-05-11  来源:条纹相机中心文本大小:【 |  | 】  【打印

  报告题目: Development of low-cost fast-timing microchannel plate photodetector 

  报告地点:五号楼三楼大会议室  

  时间:61日早上11:00 

  报告人:Dr. Junqi Xie, High Energy Physics Division, Argonne National Laboratory, Chicago, USA 

    

  Abstract: The microchannel plate (MCP) photodetector is an evolution from the basic principles of a photomultiplier tube (PMT), by replacing the conventional discrete dynodes with functional MCPs. Planar microchannel plate-based photodetectors with a bialkali photocathode are able to achieve photon detection with picosecond timing resolution and millimeter position resolution. A 6×6 cm2 photodetector production facility was designed and built at Argonne National Laboratory for MCP-PMT development.This talk reports on the design, fabrication and characterization of prototype 6 cm × 6 cm microchannel plate photodetectors with precise fast-timing measurement capability. The whole assembly is made of low cost glass materials with a bialkali photocathode top window. All components are hermetically sealed in vacuum. The prototype photodetector exhibits time resolution of 65 ps and 16 ps at single-photoelectron and multi-photoelectron levels, respectively. The spatial resolution reaches 0.54 mm for multi-photoelectron measurement. Future applications of these MCP-PMTs for various experiments will also be presented and discussed. 

  Short Biography 

  Dr. Xie currently holds the position of Assistant Physicist in the Detector R&D group in the High Energy Physics Division at Argonne National Laboratory. He received his bachelor degree from Peking University and doctor degree from Arizona State University. He conducts cross disciplinary research in physics, chemistry and materials science. He has worked on semiconductor detectors at Arizona State University and MCP-based detectors at Argonne National Laboratory over several years. His current research interests include photocathode materials, various detector design, fabrication, characterization and their applications in high energy physics, nuclear physics and national security.  Dr. Xie has collaborated with groups at Fermi National Accelerator Laboratory, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory and Stony Brook University, authored and coauthored over 30 papers with his colleagues.