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12 results on '"Morace, A."'

1. Predictive capability of material screening by fast neutron activation analysis using laser-driven neutron sources

Author

Abe, Y., primary, Nakao, A., additional, Arikawa, Y., additional, Morace, A., additional, Mori, T., additional, Lan, Z., additional, Wei, T., additional, Asano, S., additional, Minami, T., additional, Kuramitsu, Y., additional, Habara, H., additional, Shiraga, H., additional, Fujioka, S., additional, Nakai, M., additional, and Yogo, A., additional

Published
2022
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3. The conceptual design of 1-ps time resolution neutron detector for fusion reaction history measurement at OMEGA and the National Ignition Facility

Author

Arikawa, Yasunobu, primary, Ota, Masato, additional, Nakajima, Makoto, additional, Shimizu, Tomoki, additional, Segawa, Sadashi, additional, Khoa Phan, Thanh Nhat, additional, Sakawa, Youichi, additional, Abe, Yuki, additional, Morace, Alessio, additional, Mirfayzi, Seyed Reza, additional, Yogo, Akifumi, additional, Fujioka, Shinsuke, additional, Nakai, Mitsuo, additional, Shiraga, Hiroyuki, additional, Azechi, Hiroshi, additional, Kodama, Ryosuke, additional, Kan, Koichi, additional, Frenje, Johan, additional, Gatu Johnson, Maria, additional, Bose, Arijit, additional, Kabadi, Neel V., additional, Sutcliffe, Graeme D., additional, Adrian, Patrick, additional, Li, Chikang, additional, Séguin, Fredrick H., additional, and Petrasso, Richard, additional

Published
2020
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4. The conceptual design of 1-ps time resolution neutron detector for fusion reaction history measurement at OMEGA and the National Ignition Facility

Author

Mitsuo Nakai, Fredrick Seguin, Yuki Abe, Sadashi Segawa, Johan Frenje, Shinsuke Fujioka, S. R. Mirfayzi, Chikang Li, Patrick Adrian, Hiroshi Azechi, Hiroyuki Shiraga, Graeme Sutcliffe, Alessio Morace, Thanh Nhat Khoa Phan, Youichi Sakawa, Tomoki Shimizu, Neel Kabadi, Akifumi Yogo, Maria Gatu Johnson, R. D. Petrasso, Yasunobu Arikawa, M. Ota, Makoto Nakajima, Arijit Bose, Koichi Kan, and Ryosuke Kodama

Subjects
010302 applied physics, Physics, Thermonuclear fusion, business.industry, Implosion, 01 natural sciences, Pockels effect, 010305 fluids & plasmas, Optics, Orders of magnitude (time), 0103 physical sciences, Nuclear fusion, Neutron detection, National Ignition Facility, business, Instrumentation, Inertial confinement fusion
Abstract

The nuclear burn history provides critical information about the dynamics of the hot-spot formation and high-density fuel-shell assembly of an Inertial Confinement Fusion (ICF) implosion, as well as information on the impact of alpha heating, and a multitude of implosion failure mechanisms. Having this information is critical for assessing the energy-confinement time τE and performance of an implosion. As the confinement time of an ICF implosion is a few tens of picoseconds, less than 10-ps time resolution is required for an accurate measurement of the nuclear burn history. In this study, we propose a novel 1-ps time-resolution detection scheme based on the Pockels effect. In particular, a conceptual design for the experiment on the National Ignition Facility and OMEGA are elaborated upon herein. A small organic Pockels crystal "DAST" is designed to be positioned ∼5 mm from the ICF implosion, which is scanned by a chirped pulse generated by a femto-second laser transmitted through a polarization-maintained optical fiber. The originally linearly polarized laser is changed to an elliptically polarized laser by the Pockels crystal when exposed to neutrons, and the modulation of the polarization will be analyzed. Our study using 35-MeV electrons showed that the system impulse response is 0.6 ps. The response time is orders of magnitude shorter than current systems. Through measurements of the nuclear burn history with unprecedented time resolution, this system will help for a better understanding of the dynamics of the hot-spot formation, high-density fuel-shell assembly, and the physics of thermonuclear burn wave propagation.

Published
2020

5. A large-aperture high-sensitivity avalanche image intensifier panel

Author

Arikawa, Y., primary, Matsubara, S., additional, Kishimoto, H., additional, Abe, Y., additional, Sakata, S., additional, Morace, A., additional, Mizutani, R., additional, Nishibata, J., additional, Yogo, A., additional, Nakai, M., additional, Shiraga, H., additional, Nishimura, H., additional, Fujioka, S., additional, and Kodama, R., additional

Published
2018
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6. Publisher’s Note: “Monte-Carlo simulation of noise in hard X-ray Transmission Crystal Spectrometers: Identification of contributors to the background noise and shielding optimization” [Rev. Sci. Instrum. 85, 11D615 (2014)]

Author

Thfoin, I., primary, Reverdin, C., additional, Hulin, S., additional, Szabo, C. I., additional, Bastiani-Ceccotti, S., additional, Batani, D., additional, Brambrink, E., additional, Koenig, M., additional, Duval, A., additional, Leboeuf, X., additional, Lecherbourg, L., additional, Rossé, B., additional, Morace, A., additional, Santos, J. J., additional, Vaisseau, X., additional, Fourment, C., additional, Giuffrida, L., additional, and Nakatsutsumi, M., additional

Published
2015
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7. Accuracy evaluation of a Compton X-ray spectrometer with bremsstrahlung X-rays generated by a 6 MeV electron bunch

Author

Kojima, Sadaoki, primary, Arikawa, Yasunobu, additional, Nishimura, Yasuhiko, additional, Togawa, Hiromi, additional, Zhang, Zhe, additional, Ikenouchi, Takahito, additional, Ozaki, Tetsuo, additional, Morace, Alessio, additional, Nagai, Takahiro, additional, Abe, Yuki, additional, Sakata, Shouhei, additional, Inoue, Hiroaki, additional, Utsugi, Masaru, additional, Nakai, Mitsuo, additional, Nishimura, Hiroaki, additional, Shiraga, Hiroyuki, additional, Kato, Ryukou, additional, Fujioka, Shinsuke, additional, and Azechi, Hiroshi, additional

Published
2014
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8. Monte-Carlo simulation of noise in hard X-ray Transmission Crystal Spectrometers: Identification of contributors to the background noise and shielding optimization

Author

Thfoin, I., primary, Reverdin, C., additional, Hulin, S., additional, Szabo, C. I., additional, Bastiani-Ceccotti, S., additional, Batani, D., additional, Brambrink, E., additional, Koenig, M., additional, Duval, A., additional, Leboeuf, X., additional, Lecherbourg, L., additional, Rossé, B., additional, Morace, A., additional, Santos, J. J., additional, Vaisseau, X., additional, Fourment, C., additional, Giuffrida, L., additional, and Nakatsutsumi, M., additional

Published
2014
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9. Photonuclear reaction based high-energy x-ray spectrometer to cover from 2 MeV to 20 MeV

Author

Sakata, S., primary, Arikawa, Y., additional, Kojima, S., additional, Ikenouchi, T., additional, Nagai, T., additional, Abe, Y., additional, Inoue, H., additional, Morace, A., additional, Utsugi, M., additional, Kato, R., additional, Nishimura, H., additional, Nakai, M., additional, Shiraga, H., additional, Fujioka, S., additional, and Azechi, H., additional

Published
2014
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10. Publisher’s Note: 'Monte-Carlo simulation of noise in hard X-ray Transmission Crystal Spectrometers: Identification of contributors to the background noise and shielding optimization' [Rev. Sci. Instrum. 85, 11D615 (2014)]

Author

C. Fourment, I. Thfoin, L. Lecherbourg, J. J. Santos, X. Vaisseau, M. Koenig, Alessio Morace, S. Hulin, Motoaki Nakatsutsumi, Dimitri Batani, B. Rosse, Csilla I. Szabo, L. Giuffrida, S. Bastiani-Ceccotti, X. Leboeuf, Erik Brambrink, C. Reverdin, and A. Duval

Subjects
Crystal, Physics, Background noise, Nuclear magnetic resonance, Transmission (telecommunications), Spectrometer, Electromagnetic shielding, Monte Carlo method, X-ray, Instrumentation, Noise (radio), Computational physics
Published
2015

11. Accuracy evaluation of a Compton X-ray spectrometer with bremsstrahlung X-rays generated by a 6 MeV electron bunch

Author

T. Ikenouchi, Yasunobu Arikawa, Alessio Morace, Hiroaki Inoue, Sadaoki Kojima, Hiroyuki Shiraga, Mitsuo Nakai, Zhe Zhang, Shinsuke Fujioka, Yasuhiko Nishimura, Hiroaki Nishimura, Takahiro Nagai, Masaru Utsugi, Ryukou Kato, Tetsuo Ozaki, Yuki Abe, Hiromi Togawa, S. Sakata, and Hiroshi Azechi

Subjects
Physics, Range (particle radiation), Electron spectrometer, Spectrometer, Astrophysics::High Energy Astrophysical Phenomena, Electron energy loss spectroscopy, Compton scattering, Bremsstrahlung, Electron, Nuclear physics, Recoil, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, Instrumentation
Abstract

A Compton-scattering-based X-ray spectrometer is developed to obtain the energy distribution of fast electrons produced by intense laser and matter interactions. Bremsstrahlung X-rays generated by fast electrons in a material are used to measure fast electrons' energy distribution in matter. In the Compton X-ray spectrometer, X-rays are converted into recoil electrons by Compton scattering in a converter made from fused silica glass, and a magnet-based electron energy analyzer is used to measure the energy distribution of the electrons that recoil in the direction of the incident X-rays. The spectrum of the incident X-rays is reconstructed from the energy distribution of the recoil electrons. The accuracy of this spectrometer is evaluated using a quasi-monoenergetic 6 MeV electron bunch that emanates from a linear accelerator. An electron bunch is injected into a 1.5 mm thick tungsten plate to produce bremsstrahlung X-rays. The spectrum of these bremsstrahlung X-rays is obtained in the range from 1 to 9 MeV. The energy of the electrons in the bunch is estimated using a Monte Carlo simulation of particle-matter interactions. The result shows that the spectrometer's energy accuracy is ±0.5 MeV for 6.0 MeV electrons.

Published
2014

12. Accuracy evaluation of a Compton X-ray spectrometer with bremsstrahlung X-rays generated by a 6 MeV electron bunch.

Author

Sadaoki Kojima, Yasunobu Arikawa, Yasuhiko Nishimura, Hiromi Togawa, Zhe Zhang, Takahito Ikenouchi, Tetsuo Ozaki, Alessio Morace, Takahiro Nagai, Yuki Abe, Shouhei Sakata, Hiroaki Inoue, Masaru Utsugi, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Ryukou Kato, Shinsuke Fujioka, and Hiroshi Azechi

Subjects
X-ray spectrometers, COMPTON scattering, SPECTRAL energy distribution, BREMSSTRAHLUNG, FUSED silica, LINEAR accelerators, PARTICLE interactions, MONTE Carlo method
Abstract

A Compton-scattering-based X-ray spectrometer is developed to obtain the energy distribution of fast electrons produced by intense laser and matter interactions. Bremsstrahlung X-rays generated by fast electrons in a material are used to measure fast electrons' energy distribution in matter. In the Compton X-ray spectrometer, X-rays are converted into recoil electrons by Compton scattering in a converter made from fused silica glass, and a magnet-based electron energy analyzer is used to measure the energy distribution of the electrons that recoil in the direction of the incident X-rays. The spectrum of the incident X-rays is reconstructed from the energy distribution of the recoil electrons. The accuracy of this spectrometer is evaluated using a quasi-monoenergetic 6 MeV electron bunch that emanates from a linear accelerator. An electron bunch is injected into a 1.5 mm thick tungsten plate to produce bremsstrahlung X-rays. The spectrum of these bremsstrahlung X-rays is obtained in the range from 1 to 9MeV. The energy of the electrons in the bunch is estimated using a Monte Carlo simulation of particle-matter interactions. The result shows that the spectrometer's energy accuracy is ±0.5MeV for 6.0 MeV electrons. [ABSTRACT FROM AUTHOR]

Published
2014
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