Particle acceleration in magnetised shocks produced by laser and pulsed power facilities
Lead Research Organisation:
University of Oxford
Department Name: Oxford Physics
Abstract
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Publications
Kuramitsu Y
(2016)
Spherical shock in the presence of an external magnetic field
in Journal of Physics: Conference Series
Kozlowski PM
(2016)
Theory of Thomson scattering in inhomogeneous media.
in Scientific reports
Kasim MF
(2019)
Retrieving fields from proton radiography without source profiles.
in Physical review. E
Kasim M
(2019)
Inverse problem instabilities in large-scale modeling of matter in extreme conditions
in Physics of Plasmas
Ishikawa T
(2016)
Thomson scattering measurement of a collimated plasma jet generated by a high-power laser system
in Journal of Physics: Conference Series
Gregori G
(2019)
Modified Friedmann Equations via Conformal Bohm-de Broglie Gravity
in The Astrophysical Journal
Fiuza F
(2020)
Electron acceleration in laboratory-produced turbulent collisionless shocks
in Nature Physics
Cross JE
(2016)
Theory of density fluctuations in strongly radiative plasmas.
in Physical review. E
Cross JE
(2016)
Laboratory analogue of a supersonic accretion column in a binary star system.
in Nature communications
Collins GW
(2020)
Role of collisionality and radiative cooling in supersonic plasma jet collisions of different materials.
in Physical review. E
Chen L
(2020)
Transport of High-energy Charged Particles through Spatially Intermittent Turbulent Magnetic Fields
in The Astrophysical Journal
Casner A
(2018)
Turbulent hydrodynamics experiments in high energy density plasmas: scientific case and preliminary results of the TurboHEDP project
in High Power Laser Science and Engineering
Bott AFA
(2021)
Inefficient Magnetic-Field Amplification in Supersonic Laser-Plasma Turbulence.
in Physical review letters
Bott AFA
(2019)
Thomson scattering cross section in a magnetized, high-density plasma.
in Physical review. E
Bott A
(2022)
Insensitivity of a turbulent laser-plasma dynamo to initial conditions
in Matter and Radiation at Extremes
Bott A
(2021)
Time-resolved turbulent dynamo in a laser plasma
in Proceedings of the National Academy of Sciences
Bott A
(2017)
Proton imaging of stochastic magnetic fields
in Journal of Plasma Physics
Beyer K
(2018)
Analytical estimates of proton acceleration in laser-produced turbulent plasmas
in Journal of Plasma Physics
Bailly-Grandvaux M
(2018)
Guiding of relativistic electron beams in dense matter by laser-driven magnetostatic fields.
in Nature communications
Arrowsmith C
(2021)
Generating ultradense pair beams using 400 GeV / c protons
in Physical Review Research
Albertazzi B
(2022)
Triggering star formation: Experimental compression of a foam ball induced by Taylor-Sedov blast waves
in Matter and Radiation at Extremes
Albertazzi B
(2018)
Experimental platform for the investigation of magnetized-reverse-shock dynamics in the context of POLAR
in High Power Laser Science and Engineering
| 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 raise. We have also presented the work on proton diffusion at several international meetings and conferences in plasma astrophysics. We have recently performed an experiment at the GSI accelerator facility. The results from this experiment are extremely encouraging and we expect this will also generate 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 |