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Desai D, Greene G, Mahurin R, et al. Simulation of Charged Particle Trajectories in the Neutron Decay Correlation Experiment abBA. J Res Natl Inst Stand Technol. 2005;110(4):443-8doi: 10.6028/jres.110.068.
Desai, D., Greene, G., Mahurin, R., Bowman, D., & Calarco, J. (2005). Simulation of Charged Particle Trajectories in the Neutron Decay Correlation Experiment abBA. Journal of research of the National Institute of Standards and Technology, 110(4), 443-8. https://doi.org/10.6028/jres.110.068
Desai, Dharmin, et al. "Simulation of Charged Particle Trajectories in the Neutron Decay Correlation Experiment abBA." Journal of research of the National Institute of Standards and Technology vol. 110,4 (2005): 443-8. doi: https://doi.org/10.6028/jres.110.068
Desai D, Greene G, Mahurin R, Bowman D, Calarco J. Simulation of Charged Particle Trajectories in the Neutron Decay Correlation Experiment abBA. J Res Natl Inst Stand Technol. 2005 Aug 01;110(4):443-8. doi: 10.6028/jres.110.068. Print 2005. PMID: 27308165; PMCID: PMC4852824.
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J Res Natl Inst Stand Technol. 2005 Aug 01;110(4):443-8. doi: 10.6028/jres.110.068. Print 2005.

Simulation of Charged Particle Trajectories in the Neutron Decay Correlation Experiment abBA.

Journal of research of the National Institute of Standards and Technology

Dharmin Desai, Geoffrey Greene, Rob Mahurin, David Bowman, John Calarco

Affiliations

  1. University of Tennessee, Knoxville, TN 37996.
  2. Los Alamos National Laboratory, Los Alamos, NM 87545.
  3. University of New Hampshire, Durham, NH 03824.

PMID: 27308165 PMCID: PMC4852824 DOI: 10.6028/jres.110.068

Abstract

The proposed neutron decay correlation experiment, abBA, will directly detect the direction of emission of decay protons and electrons as well as providing spectroscopic information for both particles. In order to provide this information, the abBA experiment incorporates spatially varying electric and magnetic fields. We report on detailed simulations of the decay particle trajectories in order to assess the impact of various systematic effects on the experimental observables. These include among others; adiabaticity of particle orbits, tracking of orbits, reversal of low energy protons due to inhomogeneous electric field, and accuracy of proton time of flight measurements. Several simulation methods were used including commercial software (Simion), custom software, as well as analytical tools based on the use of adiabatic invariants. Our results indicate that the proposed field geometry of the abBA spectrometer will be substantially immune to most systematic effects and that transport calculations using adiabatic invariants agree well with solution of the full equations of motion.

Keywords: abBA experiment; abBA spectrometer; charged particle trajectory; coincidence experiment; computer simulation; guiding center approximation

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