2016 CAP Congress / Congrès de l'ACP 2016

Session

M3-5 Cosmic frontier: Dark matter I (PPD) / Frontière cosmique: matière sombre I (PPD)

M3-5

13 Jun 2016, 15:45

University of Ottawa

Conveners

M3-5 Cosmic frontier: Dark matter I (PPD) / Frontière cosmique: matière sombre I (PPD)

• Ian Lawson (SNOLAB)

1137. Recent Results and Future Plans for Dark Matter Searches with PICO

Tony Noble (Queen's University)

13/06/2016, 15:45

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier invité

The PICO experimental program at SNOLAB uses superheated bubble chambers to search for evidence of dark matter primarily through spin-dependent interactions on ¹⁹F in C₃F₈. Recoiling nuclei from WIMP-nucleon interactions in the active fluid deposit enough energy locally to initiate a phase transition in the fluid. The bubbles which form are observed with stereo...

1340. Study and Development of Pulse-shape Discrimination Firmware for Background Mitigation in the DEAP-3600 Experiment

Mr Simon Norman-Hobbs (TRIUMF)

13/06/2016, 16:15

Particle Physics / Physique des particules (PPD)

Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition)

DEAP-3600 is particle detector looking for weakly interacting massive particles (WIMPs) as a source of dark matter. Incident particles colliding with the 3600 kg argon target in DEAP will produce excited dimers which decay releasing scintillation light. The proportion of singlet and triplet excited states of the dimers produced depends on the interacting particle type, with the result that...

1207. **WITHDRAWN** Application of Wavelength Shifter to the Acrylic Vessel in the DEAP-3600 Dark Matter Search

Benjamin Broerman (Queen's University)

13/06/2016, 16:30

Particle Physics / Physique des particules (PPD)

Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition)

DEAP-3600 is a single phase liquid argon dark matter search experiment. The target consists of 3600 kg of liquid argon, contained in a spherical acrylic vessel and viewed by a surrounding array of photomultiplier tubes (PMTs). Particle interactions in liquid argon produce scintillation light in the vacuum ultraviolet (VUV) spectrum, which is efficiently absorbed by the surrounding acrylic. To...

1387. Improved dark matter search results from PICO-2L Run 2

Chanpreet Amole (Queen's University)

13/06/2016, 16:45

Particle Physics / Physique des particules (PPD)

Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition)

New data are reported from a second run of the 2-liter PICO-2L $C_3F_8$ bubble chamber with a total exposure of 129 kg-days at a thermodynamic threshold energy of 3.3 keV. These data show that the measure taken to control particulate contamination in the superheated fluid resulted in the absence of the anomalous background events observed in the first run of this bubble chamber. One single...

1278. **WITHDRAWN** Two-Hit and Two-Track Resolution of a Micromegas TPC with a Resistive Layer Including the Effects of Charge Induction

Roger Odell (Carleton University)

13/06/2016, 17:00

Particle Physics / Physique des particules (PPD)

Oral (Student, Not in Competition) / Orale (Étudiant(e), pas dans la compétition)

The Time Projection Chamber (TPC) for the International Linear Collider (ILC) will need to measure about 200 track points with a spatial single-hit resolution close to 100 microns. A Micro Pattern Gas Detector (MPGD) readout TPC with a resistive layer can achieve the desired resolution. A new readout technique using the principle of charge dispersion with a resistive layer on a Micromegas has...