Particle acceleration in magnetised shocks produced by laser and pulsed power facilities
Lead Research Organisation:
University of Oxford
Department Name: Oxford Physics
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Publications
Mabey P
(2017)
A strong diffusive ion mode in dense ionized matter predicted by Langevin dynamics.
in Nature communications
Beyer K
(2018)
Analytical estimates of proton acceleration in laser-produced turbulent plasmas
in Journal of Plasma Physics
Michel T
(2018)
Analytical modelling of the expansion of a solid obstacle interacting with a radiative shock
in High Power Laser Science and Engineering
Miniati F
(2018)
Axion-Driven Cosmic Magnetogenesis during the QCD Crossover.
in Physical review letters
Kasim M
(2021)
Building high accuracy emulators for scientific simulations with deep neural architecture search
in Machine Learning: Science and Technology
Denoeud A
(2016)
Dynamic X-ray diffraction observation of shocked solid iron up to 170 GPa.
in Proceedings of the National Academy of Sciences of the United States of America
Rigby A
(2018)
Electron acceleration by wave turbulence in a magnetized plasma
in Nature Physics
Fiuza F
(2020)
Electron acceleration in laboratory-produced turbulent collisionless shocks
in Nature Physics
Muller S
(2017)
Evolution of the Design and Fabrication of Astrophysics Targets for Turbulent Dynamo (TDYNO) Experiments on OMEGA
in Fusion Science and Technology
Albertazzi B
(2020)
Experimental characterization of the interaction zone between counter-propagating Taylor Sedov blast waves
in Physics of Plasmas
Description | We have performed initial experiments aimed at measuring the acceleration of electrons and protons in a turbulent plasma. These experiments have been performed at the LULI and OMEGA laser facilities. At LULI, we have found evidence of electron acceleration by lower-hybrid waves. This result indicates that wave-plasma turbulence can be important in the pre-acceleration mechanism and the result obtained here can be used to explain excess x-ray emission seen, for example, around comets entering the solar system. This work has been published in Nature Physics. On the OMEGA laser, instead, we have looked at the effect of turbulence in the propagation of charged particles (protons). The results of the experiment clearly show that as the magnetized turbulence is increased, there is marked enhancement of the proton diffusion. These results are also important for the understanding of the propagation of cosmic rays throughout the interstellar and intergalactic medium. Our work has been accepted in the Astrophysical Journal. In the last part of the project, we have also started to look at the energy change of these protons, a process known as Fermi acceleration. While we have used a simplified model of the turbulence, our calculations indicate that the energy gain is large enough to possibly become measurable on facilities like NIF and LMJ. This work could lie the basis for a future experimental proposal to those lasers. |
Exploitation Route | The data provided by these experiments provides important benchmarks for the understanding of processes related to cosmic ray physics. This has impact in astronomy and astrophysics as well as plasma science. |
Sectors | Education Energy |
Description | The results of our work have appeared in Nature Physics. We have done a press release and expect interest in the scientific community and the general public to rise. We have also presented the work on proton diffusion at several international meetings and conferences in plasma astrophysics. Following the results of this research, we have performed experiments at both the GSI accelerator facility and at CERN. The results from this experiment are extremely encouraging and we expect this will also generate a significant impact in the scientific community. |
Sector | Education,Other |
Impact Types | Cultural |
Description | Don Lamb |
Organisation | University of Chicago |
Department | Department of Astronomy and Astrophysics |
Country | United States |
Sector | Academic/University |
PI Contribution | We provide the team in Chicago our expertise in the experimental diagnostics. |
Collaborator Contribution | Don Lamb and his team provides us access to the FLASH code. Also, because of this collaboration, we can submit applications for laser time on the Omega laser facility |
Impact | Astronomy, Plasma Physics, Lasers |
Start Year | 2010 |
Title | Software for "Building high accuracy emulators for scientific simulations with deep neural architecture search" |
Description | This is the code and datasets for "Building high accuracy emulators for scientific simulations with deep neural architecture search". |
Type Of Technology | Software |
Year Produced | 2020 |
Open Source License? | Yes |
URL | https://zenodo.org/record/3782843 |
Title | Software for "Building high accuracy emulators for scientific simulations with deep neural architecture search" |
Description | This is the code and datasets for "Building high accuracy emulators for scientific simulations with deep neural architecture search". |
Type Of Technology | Software |
Year Produced | 2020 |
Open Source License? | Yes |
URL | https://zenodo.org/record/3782842 |