Computational modeling of proton acceleration with multi-picosecond and high energy, kilojoule, lasers
- Univ. of California, San Diego, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Here, we use computational modeling to investigate proton beam generation from kilojoule, multi-picosecond laser pulses pertinent to several recently commissioned, large-scale laser facilities. The dependencies of proton acceleration on electron source parameters including pulse duration, temperature, and flux are independently and systematically evaluated. Proton acceleration is found to depend not only on the source size and peak temperature of the injected electrons but also on the rate of increase for a more physical time-varying temperature. Simulations of a 10 ps, sub-relativistic intensity (8 × 1017 W/cm2) at 1 μm wavelength laser pulse show that energetic electrons generated within the expanding under-dense laser-produced plasma sustain the proton acceleration for ~20 ps. This results in 15 MeV energy gain of the protons, well above what would be predicted based on conventional intensity scalings or what has been observed with shorter pulses. Using this prolonged acceleration, a scheme consisting of a 1 ps and 10 ps double pulse is shown to further boost proton maximum energy.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1718995
- Alternate ID(s):
- OSTI ID: 1463935
- Report Number(s):
- LLNL-JRNL--750501; 935732
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 25; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
First demonstration of ARC-accelerated proton beams at the National Ignition Facility
|
journal | April 2019 |
Plasma expansion accompanying superthermal electrons in over-picosecond relativistic laser-foil interactions
|
journal | October 2019 |
Proton beam emittance growth in multipicosecond laser-solid interactions
|
journal | October 2019 |
High-angle deflection of the energetic electrons by a voluminous magnetic structure in near-normal intense laser-plasma interactions
|
journal | November 2018 |
| High-angle Deflection of the Energetic Electrons by a Voluminous Magnetic Structure in Near-normal Intense Laser-plasma Interactions | text | January 2018 |
Similar Records
Scaling of laser-driven electron and proton acceleration as a function of laser pulse duration, energy, and intensity in the multi-picosecond regime
Scaling of laser-driven electron and proton acceleration as a function of laser pulse duration, energy, and intensity in the multi-picosecond regime
Dataset
·
Thu Mar 03 23:00:00 EST 2022
·
OSTI ID:1887790
Scaling of laser-driven electron and proton acceleration as a function of laser pulse duration, energy, and intensity in the multi-picosecond regime
Journal Article
·
Wed Jan 13 19:00:00 EST 2021
· Physics of Plasmas
·
OSTI ID:1811744