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James Kneller

Associate Professor

Biography

James (Jim) Kneller received his PhD from The Ohio State University (OSU) in 2001 on the subject of Light Element Nucleosynthesis under the supervision of Gary Steigman. After remaining at OSU for a year, he came to NC State in 2002 as a postdoc working with Gail McLaughlin leaving in 2005 to take up another postdoc position at the University of Minnesota. In 2008 he later became a 'chercheur' at the French Institut de Physique Nucleaire (IPN), a division of the Centre National de la Recherche Scientifique (CNRS), and then returned to NC State in 2010 as an assistant professor.

Jim's research in theoretical astrophysics has wandered over his early career from Big Bang Nucleosynthesis, the Cosmic Microwave Background and dark energy through to Galactic Chemical Evolution and Cosmic Ray Spallation. But as a postdoc at NC State he began to explore the flavor oscillation of supernova neutrinos and this subject has remained a source of interest for him ever since. One highlight is the paper he coauthored with Gail McLaughlin and Justin Brockman on the dynamical MSW effect in supernova which remains the most comprehensive exploration of this phenomenon in the literature. His other work onneutrinos has focused upon either the theoretical underpinnings of the subject leading to his generalization of the diabaticity functions to arbitrary numbers of neutrino flavors and arbitrary interaction Hamiltonians, or upon large computational projects - particularly on turbulence - in an effort to generate realistic Galactic supernova neutrino burst signals. The results from these calculations were used to asses the sensitivity of the various Large Baseline Neutrino Experiment designs to supernova neutrinos. In 2011 Jim was awarded a Department of Energy's Early Career Research Program award for five years.

Select Publications | Complete List Of Publications

The Sensitivity of neutrinos to the supernova turbulence power spectrum: Point source statistics
Kneller, J. P., Kabadi, N. V. Phys. Rev. D, 92, 013009 (2015)

Stimulated neutrino transformation through turbulence on a changing density profile and application to supernovae
Patton, K. M., Kneller, J. P., McLaughlin, G. Phys. Rev. D, 91, 025001 (2014)

Does The Finite Size of the Proto-Neutron Star Preclude Supernova Neutrino Flavor Scintillation Due to Turbulence?
Kneller, J.P. & Mauney, A.W. Phys. Rev. D, 88, 045020 (2013)

Consequences of large theta13 for the turbulence signatures in supernova neutrinos
Kneller, J.P. & Mauney, A.W. Phys. Rev. D, 88, 025004 (2013)

Combining collective, MSW, and turbulence effects in supernova neutrino flavor evolution
Lund, T. & Kneller, J.P. Phys. Rev. D, 88, 023008 (2013)

Stimulated neutrino transformation in supernovae
J.P. Kneller, G.C. McLaughlin and K. Patton Journal of Physics G Nuclear Physics, 40, 055002 (2013)

Neutrino oscillations above black hole accretion disks: disks with electron-flavor emission
A.C. Malkus, J.P. Kneller, G.C. McLaughlin, R. Surman Phys. Rev. D, 86, 085015 (2012)

Shockwaves in Supernovae: New Implications on the Diffuse Supernova Neutrino Background
S. Galais, J.P. Kneller, C. Volpe, J. Gava Phys. Rev. D, 81, 053002 (2010)

Three Flavor Neutrino Oscillations in Matter: Flavor Diagonal Potentials, the Adiabatic Basis and the CP phase
J.P. Kneller & G.C. McLaughlin Phys. Rev. D, 80, 053002 (2009)

TOPICAL REVIEW: Neutrino flavour transformation in supernovae
H. Duan & J.P. Kneller J. Phys. G: Nucl. Part. Phys., 36, 113201 (2009)

A Dynamical collective calculation of supernova neutrino signals
J. Gava, J.P. Kneller, C. Volpe & G.C. McLaughlin Phys. Rev. Let., 103, 071101 (2009)

Oscillation Effects and Time Variation of the Supernova Neutrino Signal
J.P. Kneller, G.C. McLaughlin & J. Brockman Phys. Rev. D, 77, 045023 (2008)

Honors & Awards

  • Department of Energy Career Award