Single-shot laser-driven neutron resonance spectroscopy for temperature profiling

Zechen Lan, Yasunobu Arikawa, Seyed Reza Mirfayzi, Alessio Morace, Takehito Hayakawa, Hirotaka Sato, Takashi Kamiyama, Tianyun Wei, Yuta Tatsumi, Mitsuo Koizumi, Yuki Abe, Shinsuke Fujioka, Kunioki Mima, Ryosuke Kodama and Akifumi Yogo ()
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Zechen Lan: Osaka University
Yasunobu Arikawa: Osaka University
Seyed Reza Mirfayzi: Tokamak Energy Ltd
Alessio Morace: Osaka University
Takehito Hayakawa: National Institutes for Quantum Science and Technology
Hirotaka Sato: Hokkaido University
Takashi Kamiyama: Hokkaido University
Tianyun Wei: Osaka University
Yuta Tatsumi: Osaka University
Mitsuo Koizumi: Japan Atomic Energy Agency
Yuki Abe: Osaka University
Shinsuke Fujioka: Osaka University
Kunioki Mima: Osaka University
Ryosuke Kodama: Osaka University
Akifumi Yogo: Osaka University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract The temperature measurement of material inside of an object is one of the key technologies for control of dynamical processes. For this purpose, various techniques such as laser-based thermography and phase-contrast imaging thermography have been studied. However, it is, in principle, impossible to measure the temperature of an element inside of an object using these techniques. One of the possible solutions is measurements of Doppler brooding effect in neutron resonance absorption (NRA). Here we present a method to measure the temperature of an element or an isotope inside of an object using NRA with a single neutron pulse of approximately 100 ns width provided from a high-power laser. We demonstrate temperature measurements of a tantalum (Ta) metallic foil heated from the room temperature up to 617 K. Although the neutron energy resolution is fluctuated from shot to shot, we obtain the temperature dependence of resonance Doppler broadening using a reference of a silver (Ag) foil kept to the room temperature. A free gas model well reproduces the results. This method enables element(isotope)-sensitive thermometry to detect the instantaneous temperature rise in dynamical processes.

Date: 2024
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DOI: 10.1038/s41467-024-49142-y

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