Presentation Title

Milliqan Project: Lighting Physics Beyond the Standard Model

Faculty Mentor

David Stuart

Start Date

18-11-2017 9:59 AM

End Date

18-11-2017 11:00 AM

Location

BSC-Ursa Minor 143

Session

Poster 1

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

The Milliqan project proposes to construct a detector that would search for postulated milli-charged particles, which could elucidate the physics beyond the Standard Model, that is implied by the existence of dark matter. A prototype detector has been built and will commence recording data at CERN this fall. The detector is composed of assemblies of scintillator and photomultiplier tubes that were characterized for light tightness and their photon yields measured for cosmic ray muons. Three highly reflective materials were used to wrap the scintillator bar in order to test which material would yield the optimal photon yield. We measured the following photon yields for scintillator bars wrapped in teflon, tyvek, and aluminum: 4838 ± 821, 9033 ± 1917, 2000 ± 200 photons/muon. Furthermore, an important background arises from internal radioactivity of the scintillator. This radioactivity was measured using a gamma ray spectrometer, and we observed an activity of 300 ± 45 Hz consisting of 70 ± 15 keV X-rays. Understanding this background will form a baseline for further background investigations to be carried out at CERN this fall.

Summary of research results to be presented

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We assembled 16 Milliqan bars and measured their performance. The photon yields for bars wrapped in teflon, tyvek, and aluminum are 4838 ± 821, 9033 ± 1917, 2000 ± 200 photons/muon. Although tyvek was found to be more reflective, teflon remains the best option due a combination of moderate reflectiveness, photon yield consistency, and resistance to being susceptible to photon leaks compared to its competitor tyvek. In addition, we measured the the radioactivity observed within the bar using a gamma ray spectrometer. We observed an activity of 300 ± 45 Hz consisting of 70 ± 15 keV X-rays.

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Nov 18th, 9:59 AM Nov 18th, 11:00 AM

Milliqan Project: Lighting Physics Beyond the Standard Model

BSC-Ursa Minor 143

The Milliqan project proposes to construct a detector that would search for postulated milli-charged particles, which could elucidate the physics beyond the Standard Model, that is implied by the existence of dark matter. A prototype detector has been built and will commence recording data at CERN this fall. The detector is composed of assemblies of scintillator and photomultiplier tubes that were characterized for light tightness and their photon yields measured for cosmic ray muons. Three highly reflective materials were used to wrap the scintillator bar in order to test which material would yield the optimal photon yield. We measured the following photon yields for scintillator bars wrapped in teflon, tyvek, and aluminum: 4838 ± 821, 9033 ± 1917, 2000 ± 200 photons/muon. Furthermore, an important background arises from internal radioactivity of the scintillator. This radioactivity was measured using a gamma ray spectrometer, and we observed an activity of 300 ± 45 Hz consisting of 70 ± 15 keV X-rays. Understanding this background will form a baseline for further background investigations to be carried out at CERN this fall.