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Title: Varying stopping and self-focusing of intense proton beams as they heat solid density matter

Abstract

Transport of intense proton beams in solid-density matter is numerically investigated using an implicit hybrid particle-in-cell code. Both collective effects and stopping for individual beam particles are included through the electromagnetic fields solver and stopping power calculations utilizing the varying local target conditions, allowing self-consistent transport studies. Two target heating mechanisms, the beam energy deposition and Ohmic heating driven by the return current, are compared. The dependences of proton beam transport in solid targets on the beam parameters are systematically analyzed, i.e., simulations with various beam intensities, pulse durations, kinetic energies, and energy distributions are compared. The proton beam deposition profile and ultimate target temperature show strong dependence on intensity and pulse duration. A strong magnetic field is generated from a proton beam with high density and tight beam radius, resulting in focusing of the beam and localized heating of the target up to hundreds of eV.

Authors:
; ;  [1];  [2];  [3]
  1. Center for Energy Research, University of California-San Diego, La Jolla, California 92093 (United States)
  2. General Atomics, San Diego, California 92186 (United States)
  3. Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
Publication Date:
OSTI Identifier:
22599147
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM TRANSPORT; COMPARATIVE EVALUATIONS; DENSITY; ELECTROMAGNETIC FIELDS; ENERGY ABSORPTION; ENERGY SPECTRA; FOCUSING; HEAT; HEATING; KINETIC ENERGY; MAGNETIC FIELDS; MATTER; PARTICLES; PROTON BEAMS; PROTONS; PULSES; SIMULATION; STOPPING POWER; TRANSPORT THEORY

Citation Formats

Kim, J., McGuffey, C., E-mail: cmcguffey@ucsd.edu, Qiao, B., Beg, F. N., Wei, M. S., and Grabowski, P. E. Varying stopping and self-focusing of intense proton beams as they heat solid density matter. United States: N. p., 2016. Web. doi:10.1063/1.4945617.
Kim, J., McGuffey, C., E-mail: cmcguffey@ucsd.edu, Qiao, B., Beg, F. N., Wei, M. S., & Grabowski, P. E. Varying stopping and self-focusing of intense proton beams as they heat solid density matter. United States. https://doi.org/10.1063/1.4945617
Kim, J., McGuffey, C., E-mail: cmcguffey@ucsd.edu, Qiao, B., Beg, F. N., Wei, M. S., and Grabowski, P. E. 2016. "Varying stopping and self-focusing of intense proton beams as they heat solid density matter". United States. https://doi.org/10.1063/1.4945617.
@article{osti_22599147,
title = {Varying stopping and self-focusing of intense proton beams as they heat solid density matter},
author = {Kim, J. and McGuffey, C., E-mail: cmcguffey@ucsd.edu and Qiao, B. and Beg, F. N. and Wei, M. S. and Grabowski, P. E.},
abstractNote = {Transport of intense proton beams in solid-density matter is numerically investigated using an implicit hybrid particle-in-cell code. Both collective effects and stopping for individual beam particles are included through the electromagnetic fields solver and stopping power calculations utilizing the varying local target conditions, allowing self-consistent transport studies. Two target heating mechanisms, the beam energy deposition and Ohmic heating driven by the return current, are compared. The dependences of proton beam transport in solid targets on the beam parameters are systematically analyzed, i.e., simulations with various beam intensities, pulse durations, kinetic energies, and energy distributions are compared. The proton beam deposition profile and ultimate target temperature show strong dependence on intensity and pulse duration. A strong magnetic field is generated from a proton beam with high density and tight beam radius, resulting in focusing of the beam and localized heating of the target up to hundreds of eV.},
doi = {10.1063/1.4945617},
url = {https://www.osti.gov/biblio/22599147}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 23,
place = {United States},
year = {Fri Apr 15 00:00:00 EDT 2016},
month = {Fri Apr 15 00:00:00 EDT 2016}
}

Works referencing / citing this record:

Anomalous material-dependent transport of focused, laser-driven proton beams
journal, December 2018


Anomalous material-dependent transport of focused, laser-driven proton beams
journal, December 2018