R. P. MacDonald

GATM: A 3-D FE Fusion Magnet Model and Application to DIII-D and Next-Generation Devices

J.A. Leuer, David B. Weisberg, R. P. MacDonald, I. Favela et autres

The General Atomics Tokamak Model (GATM) is a recently developed finite element (FE) environment for assessing the performance of tokamak magnet-plasma systems. Its generic environment is designed to assess magnet performance parameters for existing tokamaks, such as Doublet-III-D (DIII-D) and next-generation tokamak. …

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Dark matter search with the PICASSO experiment

S. Archambault, R. P. MacDonald, Ed Behnke, J. P. D. Martin et autres

Search for two body muon decay signals

R. Bayes, J. F. Bueno, Yu. I. Davydov, Pierre Depommier et autres

Lepton family number violation is tested by searching for ${\ensuremath{\mu}}^{+}\ensuremath{\rightarrow}{e}^{+}{X}^{0}$ decays among the $5.8\ifmmode\times\else\texttimes\fi{}{10}^{8}$ positive muon decay events analyzed by the TWIST collaboration. Limits are set on the production of both massless and massive ${X}^{0}$ bosons. The large angular acceptance of this …

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Dressing Considerations to Promote Wound Healing

R. P. MacDonald

The information presented herein is provided for educational and informational purposes only and to promote the safe-and-effective use of the wound care products provided. It is for the attendees’ general knowledge and is not a substitute for legal or medical advice. Although …

The PICASSO Dark Matter Physics Program at SNOLAB

A. J. Noble, S. Archambault, Ed Behnke, Pijushpani Bhattacharjee et autres

Dark matter search with PICASSO

Viktor Zacek, S. Archambault, Ed Behnke, J. Behnke et autres

PICASSO at SNOLAB searches primarily for spin-dependent WIMP interactions on 19 F using the superheated droplet technique. This technique is based on the bubble chamber principle, where phase transitions in superheated liquid droplets can be triggered by WIMP induced nuclear recoils. The …

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Precision muon decay measurements and improved constraints on the weak interaction

A. Hillairet, R. Bayes, J. F. Bueno, Yu. I. Davydov et autres

The TWIST Collaboration has completed its measurement of the three muon decay parameters $\ensuremath{\rho}$, $\ensuremath{\delta}$, and ${P}_{\ensuremath{\mu}}\ensuremath{\xi}$. This paper describes our determination of $\ensuremath{\rho}$, which governs the shape of the overall momentum spectrum, and $\ensuremath{\delta}$, which controls the momentum dependence of the …

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Constraints on low-mass WIMP interactions on 19F from PICASSO

S. Archambault, Ed Behnke, Pijushpani Bhattacharjee, S. Bhattacharya et autres

Recent results from the PICASSO dark matter search experiment at SNOLAB are reported. These results were obtained using a subset of 10 detectors with a total target mass of 0.72 kg of 19F and an exposure of 114 kgd. The low backgrounds …

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Publisher’s Note: Precise measurement of parity violation in polarized muon decay [Phys. Rev. D84, 032005 (2011)]

J. F. Bueno, R. Bayes, Yu. I. Davydov, Pierre Depommier et autres

Received 21 February 2012DOI:https://doi.org/10.1103/PhysRevD.85.039908This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by American Physical Society

Precise measurement of parity violation in polarized muon decay

J. F. Bueno, R. Bayes, Yu. I. Davydov, Pierre Depommier et autres

We present a new high precision measurement of parity violation in the weak interaction, using polarized muon decay. The TWIST Collaboration has measured ${P}_{\ensuremath{\mu}}^{\ensuremath{\pi}}\ensuremath{\xi}$, where ${P}_{\ensuremath{\mu}}^{\ensuremath{\pi}}$ is the polarization of the muon in pion decay and $\ensuremath{\xi}$ describes the intrinsic asymmetry in …

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New insights into particle detection with superheated liquids

S. Archambault, F. Aubin, M. Auger, M Beleshi et autres

We report new results obtained from calibrations of superheated liquid droplet detectors used in dark matter searches with different radiation sources (n, α, γ). In particular, detectors were spiked with α-emitters located inside and outside the droplets. It is shown that the …

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Experimental Constraints on Left-Right Symmetric Models from Muon Decay

R. Bayes, J. F. Bueno, A. Hillairet, Yu. I. Davydov et autres

The TWIST Collaboration has completed a new measurement of the energy-angle spectrum of positrons from the decay of highly polarized muons. A simultaneous measurement of the muon decay parameters $\ensuremath{\rho}$, $\ensuremath{\delta}$, and ${\mathcal{P}}_{\ensuremath{\mu}}^{\ensuremath{\pi}}\ensuremath{\xi}$ tests the standard model in a purely leptonic process …

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