Efficient and Repetitive Neutron Generation by Double-Laser-Pulse Driven Photonuclear Reaction

Arikawa, Yasunobu; Kato, Yusuke; Abe, Yuki; Matsubara, Susumu; Kishimoto, H.; Nakajima, N.; Morace, A.; Yogo, Akifumi; Nishimura, Hiroaki; Nakai, M.; Fujioka, Shinsuke; Azechi, H.; Mima, K.; Inoue, Shunsuke; Nakamiya, Y.; Teramoto, Kensuke; Hashida, Masaki; Shimizu, Shuji

doi:10.1585/pfr.13.2404009

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…[1,2]. In addition, it allows the investigation of these particular plasmas as intense high energy X-ray [3], gamma [4] and neutron sources [5,6]. For a solid target experimental setup, this is due to the absorption of the photons from a high-power laser with the consequent ionization, heating, and plasma radiation emission.…”

Section: Introductionmentioning

confidence: 99%

Timepix3 detector and Geant4-based simulations for gamma energy detection in Laser Produced Plasmas

Claps¹,

Cordella²,

Murtas³

et al. 2019

J. Inst.

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The particular physics of Laser Produced Plasmas (LPP) needs some diagnostic requirements. Specifically, the X-ray monitoring of the plasma is known to be difficult since typically X-ray emissions are concentrated in bursts from a few tens of ps to few ns, based on the power and pulse time width of the laser. Therefore, the energy measurement of the radiation coming from a single experimental run is basically unfeasible using conventional techniques. Additional particles can be produced from LPP experiments, especially high energy gamma photons and electrons. As a case study in recent experiments, carried out on VEGA-2 laser facility (CLPU, Salamanca, Spain), the aim was to produce neutrons through photonuclear reactions on different types of solid targets. We have used the Timepix3 chip, in a "side-on" configuration, in order to produce a quick estimate of the gamma photons energy involved in the reactions. This detector, based on silicon, is realized with a single chip of 256 × 256 pixels bump-bonded with a 14 mm × 14 mm × 300 µm silicon layer. Interaction of gammas with the detector in this configuration produces some characteristic clusters of pixels and, for each cluster, a variety of physical and morphological parameters can be defined. Based on some of these parameters, we have characterized the detector response using some known laboratory gamma sources and the related Geant4 simulations. This allows quick energy discrimination for the gamma photons coming from different experimental runs. K: Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc); Nuclear instruments and methods for hot plasma diagnostics; Plasma diagnostics -interferometry, spectroscopy and imaging; Simulation methods and programs 1Corresponding author.

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Section: Introductionmentioning

confidence: 99%

Timepix3 detector and Geant4-based simulations for gamma energy detection in Laser Produced Plasmas

Claps¹,

Cordella²,

Murtas³

et al. 2019

J. Inst.

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A multichannel gated neutron detector with reduced afterpulse for low-yield neutron measurements in intense hard X-ray backgrounds

Abe

Nakajima

Sakaguchi

et al. 2018

Review of Scientific Instruments

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A design of multichannel gated photomultiplier tube (PMT) is presented for the 960-channel neutron time-of-flight detector at the Institute of Laser Engineering of Osaka University. This is important for the fusion science and the nuclear photonics where intense hard X-rays are generated from the interaction of ultra-short laser pulse of petawatt power density with matter. The hard X-rays often overload PMTs and cause signal-induced background noises called afterpulses, making the detection of subsequent neutrons impossible. For this reason, the PMTs are coupled with an electrical time-gating (ETG) system to avoid overloading. The ETG system disables the PMT by modulating the dynode potential during the primary X-ray flash. An after-pulsing suppression technique is demonstrated by applying a reverse bias voltage between the photocathode and the first dynode. The presented multichannel scheme provides a gate response time of 80 ns, a signal cutoff ratio of 2.5 × 102, and requires reasonably low power consumption.

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Fast neutron radiography by using laser accelerator

Arikawa

2023

atomos

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Efficient and Repetitive Neutron Generation by Double-Laser-Pulse Driven Photonuclear Reaction

Cited by 3 publications

References 17 publications

Timepix3 detector and Geant4-based simulations for gamma energy detection in Laser Produced Plasmas

Timepix3 detector and Geant4-based simulations for gamma energy detection in Laser Produced Plasmas

A multichannel gated neutron detector with reduced afterpulse for low-yield neutron measurements in intense hard X-ray backgrounds

Fast neutron radiography by using laser accelerator

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