The IceCube neutrino observatory is located in the deep glacial ice below the South Pole. IceCube
consists of over 5, 000 photomultiplier tubes regularly spaced throughout a cubic kilometre volume
of ice. The photomultiplier tubes are receptive to the light produced by high energy neutrino
interactions. As a means of evaluating our understanding of the physics of light propagation, a
comparison was made between the data taken from artificial light sources and Monte Carlo
simulations of these events. The evaluation was done by comparing the shape of the light
arrival-time distributions. The three icemodels compared were the Additionally Heterogeneous
Absorption (AHA), South Pole Ice - 1 (Spice) and South Pole Ice - Mie (Spice Mie). The artificial
light sources used are LEDs, known as flashers, located within each of the detector modules. The
data set used in this study was taken on string 63 with single- photoelectron settings (one LED).
Various orientations of the flashing LED and relative position of the light source in the detector,
were studied over 15 depths in instrumented ice. Through a χ2 comparison and distribution
characteristics it was found that for the majority of cases, simulations which used the
Spice Mie ice model matched the data best. There were, however, some isolated cases in which
simulations using the Spice 1 or AHA ice models matched the flasher data best.
| Identifer | oai:union.ndltd.org:canterbury.ac.nz/oai:ir.canterbury.ac.nz:10092/9659 |
| Date | January 2011 |
| Creators | Sarah, Bouckoms |
| Publisher | University of Canterbury. Physics and Astronomy |
| Source Sets | University of Canterbury |
| Language | English |
| Detected Language | English |
| Type | Electronic thesis or dissertation, Text |
| Rights | Copyright Bouckoms Sarah, http://library.canterbury.ac.nz/thesis/etheses_copyright.shtml |
| Relation | NZCU |
Page generated in 0.022 seconds