In-Target Proton−Boron Nuclear Fusion Using a PW-Class Laser

Daniele Margarone*, Julien Bonvalet, Lorenzo Giuffrida, Alessio Morace, Vasiliki Kantarelou, Marco Tosca, Didier Raffestin, Philippe Nicolai, Antonino Picciotto, Yuki Abe, Yasunobu Arikawa, Shinsuke Fujioka, Yuji Fukuda, Yasuhiro Kuramitsu, Hideaki Habara, Dimitri Batani

*Corresponding author for this work

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Nuclear reactions between protons and boron-11 nuclei (p−B fusion) that were used to yield energetic α-particles were initiated in a plasma that was generated by the interaction between a PW-class laser operating at relativistic intensities (~3 × 1019 W/cm2) and a 0.2-mm thick boron nitride (BN) target. A high p−B fusion reaction rate and hence, a large α-particle flux was generated and measured, thanks to a proton stream accelerated at the target’s front surface. This was the first proof of principle experiment to demonstrate the efficient generation of α-particles (~1010/sr) through p−B fusion reactions using a PW-class laser in the “in-target” geometry.
Original languageEnglish
Article numbere1444
Number of pages7
JournalApplied Sciences
Issue number3
Early online date28 Jan 2022
Publication statusEarly online date - 28 Jan 2022


  • proton–boron fusion
  • laser–plasma acceleration
  • α-particle beam


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