A Precision Measurement of the Positive Muon Lifetime
Using a Pulsed Muon Beam and the µLan Detector

R.M. Carey, P. Cushman, P.T. Debevec, W. Earle, F.E. Gray,
M. Hare, E. Hazen, D.W. Hertzog, I. Kronkvist, J.P. Miller,
O. Rind, B.L. Roberts, C.J.G. Onderwater, C.C. Polly, M. Sossong,
D.C. Urner, S. Williamson

Boston University
University of Illinois at Urbana-Champaign
University of Minnesota

8/12/99


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Table of Contents

A Precision Measurement of the Positive Muon Lifetime

Collaboration

Proposal Summary

Present knowledge of tm is 18 ppm

Classic Lifetime Techniques

Radioactive Mode

Generic Proposed Setup at PSI

Beam into Detector

PPT Slide

PPT Slide

PPT Slide

PPT Slide

Tests of muons into target

Detector and Clock

Pileup: When 2 particles are counted as 1

Segmentation

Tile Elements

dt resolution

Fdh Rejection

Pulse-height and timing data

Spin Precession Effects

Target Choice

Dephasing

Overall effect

Proof of factors

Gain (threshold) Stability

PPT Slide

Electronics & DAQ

DAQ continued

Beamtime and Run Plans 1

Beamtime and Run Plans 2

Beamtime and Run Plans 3

CONCLUSION

Author: David Hertzog

Email: hertzog@uiuc.edu