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Dive into the research topics where Jonathan Thron is active.

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Featured researches published by Jonathan Thron.


ieee nuclear science symposium | 2006

Development of a Liquid Scintillator Neutron Multiplicity Counter (LSMC)

Sy Stange; P. J. Karpius; Katherine C. Frame; William Clay; Timothy E. Elmont; Ernst-Ingo Esch; Norman A. Johansen; D.W. MacArthur; Edward A. McKigney; Morag Smith; Jonathan Thron; Richard B. Williams

A new neutron multiplicity counter is being developed that utilizes the fast response of liquid scintillator detectors. The ability to detect fast (vs. moderated) fission neutrons makes possible a coincidence gate on the order of tens of nanoseconds (vs. tens of microseconds). A neutron counter with such a narrow gate will be much less sensitive to accidental coincidences making it possible to measure items with a high single neutron background to greater accuracy in less time. This includes impure Pu items with high (alpha,n) rates as well as items of low mass HEU where a strong active interrogation source is needed. Liquid scintillator detectors also allow for energy discrimination between interrogation source neutrons and fission neutrons, allowing for even greater assay sensitivity. Designing and building a liquid scintillator multiplicity counter (LSMC) requires a symbiotic effort of simulation and experiment to optimize performance and mitigate hardware costs in the final product. We present preliminary Monte Carlo studies using the GEANT toolkit along with analysis of experimental data used to benchmark and tune the simulation.


Archive | 2012

LANL Efforts on Neutron Coincidence Modeling of INL Pulsed Neutron Data

Scott Stewart; Jonathan Thron; Martyn T. Swinhoe; William H. Geist; William S. Charlton

Overview of this presentation is: (1) pulsed histogram analysis, (2) creation of SPNS, (3) use of SPNS for modeling pulsed neutron data, (4) creation of MUDI, (5) calculated accidentals correction using GUAM + MUDI, (6) background subtraction analysis, and (7) current/figure work with MCNP.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2007

Development of a liquid scintillator neutron multiplicity counter (LSMC)

Katherine C. Frame; Willam Clay; Tim Elmont; Ernst I. Esch; P. J. Karpius; D.W. MacArthur; Edward A. McKigney; Peter A. Santi; Morag Smith; Jonathan Thron; Richard B. Williams


Archive | 2010

AVNG system objectives and concept

D.W. MacArthur; Jonathan Thron; Sergey Razinkov; Alexander Livke; Sergey Kondratov


Archive | 2010

AVNG system demonstration

Jonathan Thron; D.W. MacArthur; Sergey Kondratov; Alexander Livke; Sergey Razinkov


Archive | 2010

Random selection as a confidence building tool

D.W. MacArthur; Danielle K Hauck; Diana Langner; Jonathan Thron; Morag Smith; Richard B. Williams


Archive | 2011

Pulsed, Photonuclear-induced, Neutron Measurements of Nuclear Materials with Composite Shielding

James L. Jones; Kevin J. Haskell; Rich Waston; William H. Geist; Jonathan Thron; Corey R Freeman; Martyn T. Swinhoe; Seth M McConchie; Eric D Sword; Lee Montierth; John Zabriskie


Archive | 2012

Simultaneous Authentication and Certification of Arms-Control Measurement Systems

D.W. MacArthur; Danielle K Hauck; Jonathan Thron


Archive | 2012

Authenication and sensitive measurements

D.W. MacArthur; Jonathan Thron; Danielle K Hauck


Archive | 2010

Reference material manufacture and certification for the AVNG

Danielle K Hauck; Duncan W Mac Arthur; Jonathan Thron; Alexander Livke; Sergey Kondratov; Sergey Razinkov

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D.W. MacArthur

Los Alamos National Laboratory

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Danielle K Hauck

Los Alamos National Laboratory

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Morag Smith

Los Alamos National Laboratory

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Duncan W Mac Arthur

Los Alamos National Laboratory

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P. J. Karpius

Los Alamos National Laboratory

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Richard B. Williams

Los Alamos National Laboratory

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Peter A. Santi

Los Alamos National Laboratory

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Diana Langner

Los Alamos National Laboratory

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Edward A. McKigney

Los Alamos National Laboratory

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Katherine C. Frame

Los Alamos National Laboratory

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