MINOS and Me D Jason Koskinen Cal Det

MINOS and Me D. Jason Koskinen

Cal. Det ● Goal is to understand Detector Effects – ● Get calibration between Near and Far detector responses to same particle events A Cal. Det effect that has not been analyzed is the light output dependence of the scintillator as a function of temperature – Near/Far Detector have consistent temperature – Cal. Det runs in the PS at CERN which has fluctuation ~10 o. C D. Jason Koskinen

Temperature Calibration ● ● First runs at the Cal. Det used only a Radio. Shack probe Summer 2003 Thermocouple probes were added RS Probe Added temp probes D. Jason Koskinen

Necessity for Corrections ● ● There is a. 3%/ o. C change in light output from scintillator – Oscillation parameters are dependent on energy, so proper energy resolution for events is required – Cal. Det goal is to get calibration to 1% Take multiple runs w/ 1 Ge. V beam at Cal. Det while recording temperature with probes – With thermocouple temp Data get a handle on temperature corrections for previous data taken with only RS probe D. Jason Koskinen

Death Star creating consistent energy particle beams D. Jason Koskinen

1 Day D. Jason Koskinen

● ● Temperatures plotted over 1 day Probe 15 slope m=1. 4824 Probe 16 slope m=1. 5910 Ideally m=1 D. Jason Koskinen

Getting There. . . ● ● ● A repeated 1 Ge. V run was taken over 5 days Histograms of the 5 slopes (from each day) from 3 probes Probe 15 - 1. 5305 +/. 0879 Probe 16 - 1. 6248 +/-. 0675 Probe 17 1. 8179 +/-. 1262 D. Jason Koskinen

Future Work ● ● Electron neutrino analysis – 1 -2% of muon neutrinos will oscillate to electron neutrinos – Examine Ө 13 from electron neutrino events Difficulties – Non-pure beam of muon neutrinos – Low event rate – Code-monkey skills are currently low D. Jason Koskinen