Lawrence Livermore National Laboratory

Joshua Magee

Postdoctoral Appointment
Nuclear and Chemical Sciences Division

 +1 925-423-1124

Ph.D. Physics
College of William and Mary
M.Sc. Physics
College of William and Mary
B.S. Mechanical Engineering with Acoustics Concentration
University of Hartford

Research Interests

I am a nuclear/hadronic physicist specializing in precision measurements of fundamental quantities. Currently, my research is with the fission TPC (Time Projection Chamber), part of the NIFFTE (Neutron Induced Fission Fragment Tracking Experiment) collaboration. This experiment aims to measure neutron induced fission cross sections of various actinides to sub-percent precision using a TPC. These measurements should provide significant improvement over past determinations, and are important for next generation energy applications and stockpile stewardship. Using a time projection chamber for such measurements may also provide valuable insight into the fission process itself, enabling a more complex and complete picture.

I am also a part of the Q-weak collaboration, which focuses on precision measurements of electroweak observables, namely the proton's weak charge. The proton's weak charge is analogous to the familiar electric charge, describing instead the strength of the proton's coupling to the neutral weak Z-boson. Such precision measurements deeply probe the Standard Model of Particle Physics, and are sensitive to certain classes of potential "new," as yet unseen, physical processes. My work concentrates on background processes, namely the removal of the large aluminum target window background, and sub-percent measurements of the electron beam polarization using a Moller polarimeter. Q-weak ran at another Department of Energy facility, Jefferson Lab, between 2010-2012, and final results should be published in 2016.

Honors and Awards

  • Rolf G. Winter Graduate Teaching Award 2009
  • Belle K. Ribicoff Prize, 2007

Selected (Recent) Publications

The Q-weak Experimental Apparatus
The Q-weak Collaboration, D. Androic, et al., Nuclear Instruments and Methods A, 781, 105-133 (2015)

First Determination of the Weak Charge of the Proton
The Q-weak Collaboration, D. Androic, et al. Physical Review Letters, 111, 141803 (2013).

The Q-weak Experiment: An Overview and Preliminary Analysis
Proceedings of Quark Confinement and the Hadron Spectrum XIV. Submitted for publication.

Sub-percent Møller Polarimetry in Jefferson Lab Hall C
December, 2013, Proceedings of Science (PSTP 2013) 039.

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