Final Presentation

By: Melissa Sussmann and Brooke Cosko

The Experiment

A muon lifetime experiment uses three or four scintillators to create an enclosed volume

Lower energy muons are trapped and when they decay an electron leaves through one of the scintillators

Wires are not consistently colored

Poor soldering job

The Bases

Hamamatsu HC123-01

Multiplies voltage for PMT

Plateau Beta

Plateau Base Voltage Beta

0

0.5

1

1.5

2

2.5

0.75 0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2

Voltage (V)

Rat

e (H

z)

Singles Rate For Base Beta

0

100

200

300

400

500

600

700

800

900

0.75 0.8 0.85 0.9 0.95 1 1.05 1.1 1.15

Voltage (V)

Rat

e (H

z)

Singles Rate For Base Theta

0

100

200300

400

500

600700

800

900

0.75 0.8 0.85 0.9 0.95 1 1.05 1.1 1.15

Voltage (V)

Ra

te (

Hz)

Advice to Take Next Year

Use a vice, especially when testing high voltage on the bases.Set the potentiometer in the LBB to 13 volts.There should be counts of 1 muon per square centimeter per minute. This translates to 21 hertz from our large scintillators.Give the experiment 15 minutes to warm up before taking data.When taking data, take it all at once, without breaks in between, because your results may change from one time frame to the next.