Bulletin of the American Physical Society
2016 Fall Meeting of the APS Division of Nuclear Physics
Volume 61, Number 13
Thursday–Sunday, October 13–16, 2016; Vancouver, BC, Canada
Session HH: Mini-symposium on Instrumentation for Physics Beyond the Standard Model IAMini-Symposium
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Chair: Tim Classen, Lawrence Livermore National Laboratory Room: Pavilion Ballroom C |
Saturday, October 15, 2016 8:30AM - 9:06AM |
HH.00001: Radiofrequency instruments to search for new particles and measure neutrino mass Invited Speaker: Gray Rybka The smallness of the neutrino mass scale and renewed interest in sub-eV particles to explain dark matter and dark energy suggest that physics beyond the standard model may be found by looking at energies much lower than those traditionally associated with nuclear physics. Fortuitously, recent advances in microwave and radiofrequency electronics from fields such as radio astronomy and quantum computing offer the ability to access these energy scales with unprecedented sensitivity. I will discuss the application of these advances to nuclear physics, highlighting experiments using microwave technology to probe the neutrino mass scale and experiments using of quantum radiofrequency electronics to search for sub-eV particles such as axions. [Preview Abstract] |
Saturday, October 15, 2016 9:06AM - 9:18AM |
HH.00002: Overview of the Project 8 Experiment Brent VanDevender We present an overview of the Project 8 experiment, a concept for the next-generation direct neutrino mass measurement after KATRIN, with a sensitivity goal to cover the range of neutrino masses allowed by the inverted mass hierarchy. Project 8 is a tritium endpoint experiment based on Cyclotron Radiation Emission Spectroscopy (CRES) of beta decay electrons from an {\em atomic} tritium source. We demonstrate how this combination can offer advantages in both statistical and systematic uncertainties compared to existing technologies. We then present our staged approach to develop the technology for the final experiment, including a discussion of the demanding specifications for an atomic tritium source. [Preview Abstract] |
Saturday, October 15, 2016 9:18AM - 9:30AM |
HH.00003: Status of the KATRIN neutrino mass experiment Eric Martin The upcoming Karlsruhe Tritium Neutrino (KATRIN) experiment aims to explore neutrino mass down to 0.2 eV/c$^{\mathrm{2}}$ (90{\%} CL) by measuring the shape of the tritium beta decay spectrum. Using magnetic adiabatic collimation with an electrostatic filter (MAC-E filter) KATRIN will measure the electron kinetic energy spectrum with a resolution better than one part in 10$^{\mathrm{4}}$. All major components are on site and commissioning is underway, with first tritium data currently scheduled for 2017. The measurement technique will be explained along with an update on commissioning progress. [Preview Abstract] |
Saturday, October 15, 2016 9:30AM - 9:42AM |
HH.00004: CUPID: CUORE Upgrade with Particle IDentification Raul Hennings-Yeomans, Yury Kolomensky CUPID is a proposed future tonne-scale bolometric neutrinoless double beta decay experiment to probe the Majorana nature of neutrinos and discover Lepton Number Violation in the so-called inverted hierarchy region of the neutrino mass. CUPID builds on experience, expertise and lessons learned in CUORE (Cryogenic Underground Observatory for Rare Events), which is about to start operations at Gran Sasso National Laboratories (LNGS) in Italy. CUPID will exploit the current CUORE infrastructure as much as possible. In order to achieve its ambitious science goals, CUPID aims to increase the source mass and dramatically reduce the backgrounds in the region of interest. This requires isotopic enrichment, upgraded purification and crystallization procedures, new detector technologies, a stricter material selection, and possibly new shielding concepts with respect to the state of the art deployed in CUORE. We will discuss the science goals of CUPID and will focus on the near-term R\&D goals, aiming to demonstrate its ultimate sensitivity. [Preview Abstract] |
Saturday, October 15, 2016 9:42AM - 9:54AM |
HH.00005: Design of a Novel Electromagnet for an Experimental Search for CP Violation in ortho-Positronium Decays Gulden Othman, Reyco Henning, Chelsea Bartram, Jake Murphy Observation of CP-violation in the lepton sector can help explain the matter-antimatter asymmetry in our universe. CALIOPE, or CP Aberrant Leptons in ortho-Positronium Experiment, is a proposed experiment which aims to measure CP violating angular correlations in the gamma-rays emitted in the decay of ortho-Positronium. This experiment will use an existing barrel array of NaI detectors located at the Triangle Universities Nuclear Laboratory (TUNL). It will improve over previous searches by increasing angular coverage and systematics. In this talk we will focus the design of the novel electromagnet that will be used in this experiment. This electromagnet design is one of several proposed improvements to decrease the systematics effects of earlier experiments. [Preview Abstract] |
Saturday, October 15, 2016 9:54AM - 10:06AM |
HH.00006: Transport of polarized 3He for the nEDM experiment at the SNS Thomas Rao, Douglas Beck, Jaakko Koivuniemi, Ike Silvera, Steven Williamson, Weijun Yao The neutron electric dipole moment (nEDM) experiment at the ORNL SNS aims to determine the neutron's electric dipole moment to an accuracy of 5.4 x 10\textasciicircum -28 e cm by measuring the Lamor precession of neutrons using the spin dependent reaction n$+$3He $=$\textgreater p$+$3H$+$764KeV. In the experiment polarized 3He is injected into a free surface of 4He, and then brought to the measurement cell and removed once it depolarizes. The proposed transport method for the 3He, the heat flush mechanism, must be tested. In the heat flush mechanism a thermal gradient along a long pipe, generates phonons whose collisions with 3He, drives 3He transport to the cold end of the pipe. Tests of the heat flush mechanism by measuring the change in 3He concentration at the cold end of a long pipe, using a capacitive pressure sensor, are underway at Harvard University. [Preview Abstract] |
Saturday, October 15, 2016 10:06AM - 10:18AM |
HH.00007: Spin Exchange Optical Pumping of $^{\mathrm{129}}$Xe for the Neutron Electron Dipole Moment Experiment at TRIUMF Eric Miller, Tomohiro Hayamizu, Joshua Wienands, Emily Altiere, David Jones, Kirk Madison, Takamasa Momose, Michael Lang, Chris Bidinosti, Jeffery Martin Spin polarized noble gases have been a field of study for several decades and are of particular interest with respect to magnetic sensing. Using the Spin Exchange Optical Pumping technique, one can use the angular momentum of circularly polarized NIR photons to spin polarize Rb atoms, which then collide with Xe to polarize the ground state Zeeman sublevels of Xe many orders of magnitude above typical thermal Boltzmann distributions. The resulting polarized gas, with its magnetic dipole moment, is a useful probe of magnetic fields. We plan to use two spin polarized species, $^{\mathrm{129}}$Xe and $^{\mathrm{199}}$Hg, as dual co-magnetometers for the neutron EDM experiment at TRIUMF. They will be used to correct the neutron precession frequency for drifts due to magnetic field instability and geometric phase effects. For $^{\mathrm{129}}$Xe, we aim to probe the populations of the ground state Zeeman sublevels using UV two-photon transitions. The respective populations depend on how much polarization we can produce using the SEOP technique. We will present technical details of our apparatus including results from a parameter space search, investigating how mode of preparation (batch or continuous flow), temperature, flow rate, and laser power affect $^{\mathrm{129}}$Xe polarization as measured by low field NMR. [Preview Abstract] |
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