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Analysis of the second flight of the ANtarctic Impulsive Transient Antenna with a focus on filtering techniques

Dailey, Brian T
http://orcid.org/0000-0002-6954-7261
http://rave.ohiolink.edu/etdc/view?acc_num=osu1483657450682456

Abstract Details

2017, Doctor of Philosophy, Ohio State University, Physics.
The observed cutoff in the cosmic ray spectrum leads to a highly motivated expectation of an ultra-high energy (UHE) neutrino flux, coming from interactions between the cosmic rays and cosmic microwave background photons. Although no UHE neutrinos have yet been detected; better background separation and removal will help accelerate the search. Past flights of the ANtarctic Impulsive Transient Antenna (ANITA) experiment have set the strongest limits on the UHE neutrino flux above 10^{19} eV. Due to the advanced sensitivity of future flights to both signal and anthropogenic backgrounds, the techniques used in the past analyses may not be sufficient to remove backgrounds. Here, we discuss processes developed for this analysis. First, we discuss newly techniques to filter event waveforms in both the amplitude and phase spectra. These new techniques were applied to the ANITA-2 experiment data set. We discuss a new technique developed that uses equal area bins of ice on the Antarctic continent. Further, we define a set of analysis cuts, how the analysis cuts were optimized for maximum sensitivity for UHE neutrinos, how the number of background and neutrino events were estimated. For our search, we used the maximal Kotera et. al. 2010 flux model and optimized based on this model. After optimization, we found zero events from the 10% sample passing all cuts. These techniques will prove useful for future flights of ANITA as the sensitivity of the instrument increases. The optimization procedure can also provide a starting point for future analysis. The filtering technique shown here decreased mis-reconstruction in pointing of events. The HealPix method, while requiring further refinement, shows promise by retaining valuable areas of ice that may have been removed from previous analyses.
Amy Connolly (Advisor)
John Beacom (Committee Member)
Klaus Honscheid (Committee Member)
Andrew Heckler (Committee Member)
187 p.
Physics
ANITA; Ultra High Energy Neutrinos; HealPix; ANITA-2 analysis; amplitude filtering; phase filtering;

Recommended Citations

Citations

  • Dailey, B. T. (2017). Analysis of the second flight of the ANtarctic Impulsive Transient Antenna with a focus on filtering techniques [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483657450682456

    APA Style (7th edition)

  • Dailey, Brian. Analysis of the second flight of the ANtarctic Impulsive Transient Antenna with a focus on filtering techniques. 2017. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1483657450682456.

    MLA Style (8th edition)

  • Dailey, Brian. "Analysis of the second flight of the ANtarctic Impulsive Transient Antenna with a focus on filtering techniques." Doctoral dissertation, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483657450682456

    Chicago Manual of Style (17th edition)

osu1483657450682456
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© 2017, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.