1. The MuLan Detector Calibration System Christopher J. Church James Madison University April 23, 2005

2. Overview: μLan Project Detector Calibration System Current Status Data Analysis Things to come

3. μLan Project: What is it? Collaborative effort to achieve a one part per million (PPM) measurement of the muon lifetime The Paul Scherrer Institut Villigen, Switzerland

4. The Experiment: Detectors Photomultipl ier Tubes Scintillation Material Light Guides e+e+e+e+

5. Detector Calibration System The detector calibration system allows simulations of muon decay to be run as well as individual detector testing

6. Using LED’s The LED Pulser Boards Fiber Optic Connection Assembly

7. LED Boards and Fibers Installed

8. LED System: Concept to Reality Driver Boxes Driver Boards ECL to TTL Boards Driver Boards

9. Installation of the System Summer 2004

10. Some Initial Data

14. Some Analysis to Come... Consistent output from each LED Any anomalous features in the data

15. Current Status The Calibration System was installed on the detector July 2004 The System is currently functioning on for 50% of the detectors in the ball

16. The Future… Currently plans are being developed to bring the remaining 50% of detector LEDs online during the summer of 2005

17. Acknowledgments Dr. Kevin Giovanetti, Eric Bartel, Matt Miller, and Rebekah Esmaili http://csm.jmu.edu/physics/giovanetti/GiovanettiResearchGroupWeb/summer2004/index.htm http://csm.jmu.edu/physics/giovanetti/GiovanettiResearchGroupWeb/summer2004/index.htm T.I. Banks et al. “MuLan Progress Report 2004” The μLan Collaboration: Boston U., U. of Illinois Urbana-Champaign, U. of Kentucky, U of CA, Berkeley http://ten.npl.uiuc.edu/exp/mulan/muLanMain.html National Science Foundation KAMLAND http://www.awa.tohoku.ac.jp/html/KamLAND/ PSI Experiment R99.07.01