Cosmic Rays Ty Fredriks SCIPP 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/m 2 /60 sec Or how much, how fast over how far  Observed rates ±8,500 hits per m 2 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.