Varying stopping and self-focusing of intense proton beams as they heat solid density matter
- 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
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.
- Research Organization:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0002034; AC52-07NA27344; FA9550-14-1-0346
- OSTI ID:
- 1465197
- Alternate ID(s):
- OSTI ID: 1247017
- Journal Information:
- Physics of Plasmas, Vol. 23, Issue 4; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Particle-in-cell simulations of laser–plasma interactions at solid densities and relativistic intensities: the role of atomic processes
|
journal | January 2018 |
Anomalous material-dependent transport of focused, laser-driven proton beams
|
journal | December 2018 |
Particle-in-cell simulation of transport and energy deposition of intense proton beams in solid-state materials
|
journal | July 2019 |
Particle-in-cell simulations of laser–plasma interactions at solid densities and relativistic intensities: the role of atomic processes
|
text | January 2018 |
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