Laserlab-Europe Talks: A multi-MeV Alpha Particle Source via Proton-Boron fusion driven by a 10-GW Tabletop Laser
- https://www.laserlab-europe.eu/events/laserlab-events/2023/laserlab-europe-talks-multi-mev-alpha-particle-source
- Laserlab-Europe Talks: A multi-MeV Alpha Particle Source via Proton-Boron fusion driven by a 10-GW Tabletop Laser
- 2023-06-21T16:00:00+02:00
- 2023-06-21T17:00:00+02:00
- What Laserlab-Event
- When Jun 21, 2023 from 04:00 PM to 05:00 PM (Europe/Berlin / UTC200)
- Where Zoom
- Add event to calendar iCal
A multi-MeV Alpha Particle Source via Proton-Boron fusion driven by a 10-GW Tabletop Laser
Speaker: Valeria Istokskaia (ELI Beamlines, Czech Republic)
Date: Wednesday, 21 June 2023, 4pm CEST
Nuclear fusion between protons and boron-11 nuclei has undergone a revival of interest thanks to the rapid progress in pulsed laser technology. Potential applications of such reaction range from controlled nuclear fusion to radiobiology and cancer therapy. A laser-driven fusion approach consists in the interaction of high-power, high-intensity pulses with H- and B-rich targets. We report on a pioneering experiment exploiting proton-boron fusion in CH/BN targets to obtain high-energy alpha particle beams (up to 5 MeV) using a compact approach and a tabletop laser system with a peak power of ~10 GW, which can operate at high-repetition rate (up to 1 kHz). The secondary resonance in the cross section of proton-boron fusion (~150 keV in the center-of-mass frame) is exploited for the first time using a laser-based approach. The generated alpha particles are characterized in terms of energy, flux, and angular distribution using solid-state nuclear-track detectors, demonstrating a flux of ~105 particles per second at 10 Hz, and ~106 per second at 1 kHz. Numerical hydrodynamic and particle-in-cell simulations support our experimental findings. Potential impact of our approach on future spread of ultra-compact, multi-MeV alpha particle sources driven by moderate intensity (1016-1017 W/cm2) laser pulses is anticipated.
Watch the recording on our YouTube channel >>