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Online Muon Capture and Decay Experiment: Physics Outreach with Cosmic Muons

Experience a real physics experiment with cosmic muons through this project, making science accessible to all. Explore experimental details and take a website tour. Learn about time dilation and special relativity in this classic experiment, popular in advanced physics labs. The setup includes the Xilinx Cypress EZ-USB BlackBox and Apache XML/SWF Charts. Understand muon signals from passing and stopping muons, view waveforms, and energy spectra online. Download data for analysis in Excel or MATLAB. This project enables physics outreach through hardware, software, and web tools, attracting a wide audience.

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Online Muon Capture and Decay Experiment: Physics Outreach with Cosmic Muons

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  1. Online Muon Capture and Decay Experiment Megan Alexander, Daniel Miner, Wojtek Skulski, Frank Wolfs University of Rochester Work funded by a grant from the APS WYP 2005 and a grant from the NSF.

  2. Overview • Purpose: • To capture and share data from cosmic muons, making a “real” physics experiment accessible to the public. • In this talk: • Experimental details • Website tour APS Meeting March 2006 M.Alexander

  3. Motivation • Time dilation (special relativity) • Classic experiment, popular in advanced physics labs • Outreach Mount Washington, NH APS Meeting March 2006 M.Alexander

  4. Xilinx Cypress EZ-USB BlackBox Apache XML/SWF Charts AWStats Experiment Setup Internet Cosmic Muons DDC-8 Circuit Board (DSP) Tools Detector (Scintillator + PMT) APS Meeting March 2006 M.Alexander

  5. JTAG connector RAM 500 kB Analog signal IN 8 channels (only 1 used) with digital offset and gain control micro processor RS-232 USB FPGA Logic connectors NIM 16 lines IN, 8 lines OUT 16 bidirectional TTL lines + 1 in (pool of extra logic I/O) DDC-8 • Developed by Wojtek Skulski. ADC 40 MHz * 10 bits (8 channels) ECL clock IN (optional) Diagnostic OUT 40 MHz * 10 bits APS Meeting March 2006 M.Alexander

  6. μ+ μ+ μ+ μ+ e+ ve vμ Typical Muon Signals Passing Muons: • Stopping Muons: APS Meeting March 2006 M.Alexander

  7. Web View: Waveforms Time constant: 2.1 μs http://wolfspc.pas.rochester.edu/muon/daq.html APS Meeting March 2006 M.Alexander

  8. Web View:Energy Spectra • Conventional muon lifetime experiments do not exploit DSP for particle ID: this one does! http://wolfspc.pas.rochester.edu/muon/EnergySpectra.html APS Meeting March 2006 M.Alexander

  9. Downloadable Data http://wolfspc.pas.rochester.edu/muon/DLData.html APS Meeting March 2006 M.Alexander

  10. Downloadable Data • View from Excel, MATLAB APS Meeting March 2006 M.Alexander

  11. Summary and Conclusion • Physics outreach enabled by hardware, software, web tools. • Total unique visitors: APS Meeting March 2006 M.Alexander

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