Varying stopping and self-focusing of intense proton beams as they heat solid density matter
Abstract
For this study, the 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:
-
- Univ. of California, San Diego, CA (United States). Center for Energy Research
- General Atomics, San Diego, CA (United States)
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1465197
- Alternate Identifier(s):
- OSTI ID: 1247017
- Grant/Contract Number:
- NA0002034; AC52-07NA27344; FA9550-14-1-0346
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 4; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; collisional energy loss; Maxwell equations; electrical resistivity; protons; current density; ion beams; collective effects; plasma ionization; focused ion beam technology; magnetic fields
Citation Formats
Kim, J., McGuffey, C., Qiao, B., Wei, M. S., Grabowski, P. E., and Beg, F. N. 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., Qiao, B., Wei, M. S., Grabowski, P. E., & Beg, F. N. 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., Qiao, B., Wei, M. S., Grabowski, P. E., and Beg, F. N. Tue .
"Varying stopping and self-focusing of intense proton beams as they heat solid density matter". United States. https://doi.org/10.1063/1.4945617. https://www.osti.gov/servlets/purl/1465197.
@article{osti_1465197,
title = {Varying stopping and self-focusing of intense proton beams as they heat solid density matter},
author = {Kim, J. and McGuffey, C. and Qiao, B. and Wei, M. S. and Grabowski, P. E. and Beg, F. N.},
abstractNote = {For this study, the 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},
journal = {Physics of Plasmas},
number = 4,
volume = 23,
place = {United States},
year = {Tue Apr 12 00:00:00 EDT 2016},
month = {Tue Apr 12 00:00:00 EDT 2016}
}
Web of Science
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