Cosmic Rays

Ty FredriksSCIPP QuarkNet Summer Institute

Experiment Design

Set up CRMD to run overnight

Gather data Analyze data using

flux and performance studies

Present data to esteemed colleagues

Performance Analysis

Observations: Each detector had

relatively the same number of counts

Histogram shows graphs slightly offset

Interpretation: Last year’s plateau

still working but needs to be fine-tuned

Flux Analysis

What is flux? Units: events/m2/60

sec Or how much, how

fast over how far Observed rates

±8,500 hits per m2 per 60 seconds

140 hits per second =140 hz

Channel 0 only (detector A)

Uncertainty

The amount of relative assurance that our measurements are statistically significant

Uncertainty = 1/root(n) 1/root(8,500)=1/92.2 = .011 1.1% uncertainty Why a low uncertainty?

Large number of samples

Final Observations of SCIPP

Most useful outcome of week:

Having an easily-accessible method of detector usage.

Great looking instrument for high student interest.

Final Observations of SCIPP

Great opportunity for teacher collaboration

Final Observations of SCIPP

High interest, collegiate level lectures on cutting-edge science topics.

Final Thanks

Steve Kliewer For all the effort at putting together a

quality educational opportunity, as well as his woodworking craftsmanship.

Vicki and Hartmut For all their efforts at organizing this

workshop Chris Whelan and QuarkNet

For allowing us (and our students) to play with such interesting equipment.