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<p>Laser-driven neutron sources (LDNSs) offer unique advantages for fundamental physics and applications: ultrashort pulses providing superior energy resolution, high instantaneous flux, and a reduced footprint. While single-event neutron spectroscopy has been demonstrated with epithermal neutrons, its application for fast neutrons is more challenging and remains unproven. This demands stable multi-shot operation and detectors resilient to this particularly extreme environment. Here, a proof-of-concept experiment at the DRACO PW laser is presented. This setup stably produced &#xa0;~&#xa0;10<sup>8</sup> fast neutrons per shot sustained over more than 200 shots at a shot-per-minute rate. Neutron time-of-flight measurements with a diamond detector at only 150 cm from the source resolved individual neutron-induced reactions at a rate consistent with simulations informed by real-time diagnostics of accompanying gammas, ions, and electrons. Combined with the recent advances in the field, this work establishes LDNSs as a promising, scalable platform for future fast neutron-induced reaction studies, particularly those involving short-lived isotopes.</p>

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Single-event fast neutron time-of-flight spectrometry with a petawatt-laser-driven neutron source

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月1日

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  • M. A. Millán-Callado,
  • S. Scheuren,
  • A. Alejo,
  • J. Benlliure,
  • R. Beyer,
  • T. E. Cowan,
  • B. Fernández,
  • E. Griesmayer,
  • A. R. Junghans,
  • J. Kohl,
  • F. Kroll,
  • J. Metzkes-Ng,
  • I. Prencipe,
  • J. M. Quesada,
  • M. Rehwald,
  • C. Rödel,
  • T. Rodríguez-González,
  • U. Schramm,
  • M. Roth,
  • R. Štefaníková,
  • S. Urlass,
  • C. Weiss,
  • K. Zeil,
  • T. Ziegler,
  • C. Guerrero

摘要

Laser-driven neutron sources (LDNSs) offer unique advantages for fundamental physics and applications: ultrashort pulses providing superior energy resolution, high instantaneous flux, and a reduced footprint. While single-event neutron spectroscopy has been demonstrated with epithermal neutrons, its application for fast neutrons is more challenging and remains unproven. This demands stable multi-shot operation and detectors resilient to this particularly extreme environment. Here, a proof-of-concept experiment at the DRACO PW laser is presented. This setup stably produced  ~ 108 fast neutrons per shot sustained over more than 200 shots at a shot-per-minute rate. Neutron time-of-flight measurements with a diamond detector at only 150 cm from the source resolved individual neutron-induced reactions at a rate consistent with simulations informed by real-time diagnostics of accompanying gammas, ions, and electrons. Combined with the recent advances in the field, this work establishes LDNSs as a promising, scalable platform for future fast neutron-induced reaction studies, particularly those involving short-lived isotopes.