1. Single-shot laser-driven neutron resonance spectroscopy for temperature profiling.
- Author
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Lan, Zechen, Arikawa, Yasunobu, Mirfayzi, Seyed Reza, Morace, Alessio, Hayakawa, Takehito, Sato, Hirotaka, Kamiyama, Takashi, Wei, Tianyun, Tatsumi, Yuta, Koizumi, Mitsuo, Abe, Yuki, Fujioka, Shinsuke, Mima, Kunioki, Kodama, Ryosuke, and Yogo, Akifumi
- Subjects
NEUTRON resonance ,NEUTRON spectroscopy ,DOPPLER broadening ,NEUTRON capture ,DOPPLER effect ,LASER pulses ,SPECTRAL line broadening ,NEUTRON radiography - 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. Non-contact thermometry is one of the key technologies for modern science and industry. Here, authors demonstrated measurement of temperature of an element using neutron resonance spectroscopy with Doppler broadening with single intense short neutron pulse provided from high peak power. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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