TY - JOUR
T1 - Plasma polymers as targets for laser-driven proton-boron fusion
AU - Tosca, Marco
AU - Molloy, Daniel
AU - McNamee, Aaron
AU - Pleskunov, Pavel
AU - Protsak, Mariia
AU - Biliak, Kateryna
AU - Nikitin, Daniil
AU - Kousal, Jaroslav
AU - Krtouš, Zdeněk
AU - Hanyková, Lenka
AU - Hanuš, Jan
AU - Biederman, Hynek
AU - Foster, Temour
AU - Nersisyan, Gagik
AU - Martin, Philip
AU - Ho, Chloe
AU - Macková, Anna
AU - Mikšová, Romana
AU - Borghesi, Marco
AU - Kar, Satyabrata
AU - Istokskaia, Valeriia
AU - Levy, Yoann
AU - Picciotto, Antonino
AU - Giuffrida, Lorenzo
AU - Margarone, Daniele
AU - Choukourov, Andrei
N1 - Funding Information:
MT thanks the support of Charles University through the student GAUK: 110-10/252390 2023 and Marvel Fusion GmbH, KB and MP also acknowledge Charles University with the student grant SVV 260 579-2023. DM acknowledge the support of the HB11 Energy studentship (R8509CPP). DM thanks the STFC Scientific Computing Department’s SCARF cluster and the kelvin2 cluster at Northern Ireland High Performance Computing (NI-HPC) facility funded by EPSRC (EP/T022175) for providing computational resources. The FLASH hydrodynamic code used in this work was developed in part by the DOE NNSA- and DOE Office of Science supported Flash Center for Computational Science at the University of Chicago and the University of Rochester. This work used the open-source particle-in-cell code WarpX https://github.com/ECP-WarpX/WarpX , primarily funded by the US DOE Exascale Computing Project. Primary WarpX contributors are with LBNL, LLNL, CEA-LIDYL, SLAC, DESY, CERN, and Modern Electron. We acknowledge all WarpX contributors. Some parts of the Research (RBS, ERDA analyses) were realised at the CANAM (Center of Accelerators and Nuclear Analytical Methods LM 2011019) infrastructure and the work was supported by the MEYS under the project CANAM OP, CZ.02.1.01/0.0/0.0/16_013/0001812. We acknowledge the EUROfusion Consortium, which was funded by the European Union via the Euratom Research and Training Program (Grant agreement no. 101052200—EUROfusion).
Funding Information:
This research was funded by the project “Target Engineering for Proton-Boron Nuclear Fusion Studies” sponsored by the UK Royal Society. This work is partially supported by the project Advanced research using high intensity laser produced photons and particles (ADONIS) CZ.02.1.01/0.0/0.0/16_019/0000789 from European Regional Development Fund (ERDF). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 871161. YL acknowledges the support of The European Regional Development Fund and the state budget of the Czech Republic (project BIATRI: No. CZ.02.1.01/0.0/0.0/15_003/0000445).
Publisher Copyright:
Copyright © 2023 Tosca, Molloy, McNamee, Pleskunov, Protsak, Biliak, Nikitin, Kousal, Krtouš, Hanyková, Hanuš, Biederman, Foster, Nersisyan, Martin, Ho, Macková, Mikšová, Borghesi, Kar, Istokskaia, Levy, Picciotto, Giuffrida, Margarone and Choukourov.
PY - 2023/7/27
Y1 - 2023/7/27
N2 - Laser-driven proton-boron (pB) fusion has been gaining significant interest for energetic alpha particles production because of its neutron-less nature. This approach requires the use of B- and H-rich materials as targets, and common practice is the use of BN and conventional polymers. In this work, we chose plasma-assisted vapour phase deposition to prepare films of oligoethylenes (plasma polymers) on Boron Nitride BN substrates as an advanced alternative. The r.f. power delivered to the plasma was varied between 0 and 50 W to produce coatings with different crosslink density and hydrogen content, while maintaining the constant thickness of 1 μm. The chemical composition, including the hydrogen concentration, was investigated using XPS and RBS/ERDA, whereas the surface topography was analyzed using SEM and AFM. We triggered the pB nuclear fusion reaction focusing laser pulses from two different systems (i.e., the TARANIS multi-TW laser at the Queen’s University Belfast (United Kingdom) and the PERLA B 10-GW laser system at the HiLASE center in Prague (Czech Republic)) directly onto these targets. We achieved a yield up to 108 and 104 alpha particles/sr using the TARANIS and PERLA B lasers, respectively. Radiative-hydrodynamic and particle-in-cell PIC simulations were performed to understand the laser-target interaction and retrieve the energy spectra of the protons. The nuclear collisional algorithm implemented in the WarpX PIC code was used to identify the region where pB fusion occurs. Taken together, the results suggest a complex relationship between the hydrogen content, target morphology, and structure of the plasma polymer, which play a crucial role in laser absorption, target expansion, proton acceleration and ultimately nuclear fusion reactions in the plasma.
AB - Laser-driven proton-boron (pB) fusion has been gaining significant interest for energetic alpha particles production because of its neutron-less nature. This approach requires the use of B- and H-rich materials as targets, and common practice is the use of BN and conventional polymers. In this work, we chose plasma-assisted vapour phase deposition to prepare films of oligoethylenes (plasma polymers) on Boron Nitride BN substrates as an advanced alternative. The r.f. power delivered to the plasma was varied between 0 and 50 W to produce coatings with different crosslink density and hydrogen content, while maintaining the constant thickness of 1 μm. The chemical composition, including the hydrogen concentration, was investigated using XPS and RBS/ERDA, whereas the surface topography was analyzed using SEM and AFM. We triggered the pB nuclear fusion reaction focusing laser pulses from two different systems (i.e., the TARANIS multi-TW laser at the Queen’s University Belfast (United Kingdom) and the PERLA B 10-GW laser system at the HiLASE center in Prague (Czech Republic)) directly onto these targets. We achieved a yield up to 108 and 104 alpha particles/sr using the TARANIS and PERLA B lasers, respectively. Radiative-hydrodynamic and particle-in-cell PIC simulations were performed to understand the laser-target interaction and retrieve the energy spectra of the protons. The nuclear collisional algorithm implemented in the WarpX PIC code was used to identify the region where pB fusion occurs. Taken together, the results suggest a complex relationship between the hydrogen content, target morphology, and structure of the plasma polymer, which play a crucial role in laser absorption, target expansion, proton acceleration and ultimately nuclear fusion reactions in the plasma.
KW - boron nitride
KW - plasma polymer
KW - proton-boron fusion
KW - thin films
KW - ultra-high intense lasers
U2 - 10.3389/fphy.2023.1227140
DO - 10.3389/fphy.2023.1227140
M3 - Article
AN - SCOPUS:85167502858
VL - 11
JO - Frontiers in Physics
JF - Frontiers in Physics
M1 - 1227140
ER -