Search Results - "Johzaki, T"

Formation of high areal density core using an efficient and robust implosion method for fast ignition by Nagatomo, H., Johzaki, T., Takizawa, R., Fujioka, S.

“…Abstract A new fuel compression method for a fast ignition scheme is discussed. To form a high areal density fuel plasma for the ignition condition, homogenous…”
Get full text

Super-strong magnetic field-dominated ion beam dynamics in focusing plasma devices by Morace, A., Abe, Y., Honrubia, J. J., Iwata, N., Arikawa, Y., Nakata, Y., Johzaki, T., Yogo, A., Sentoku, Y., Mima, K., Ma, T., Mariscal, D., Sakagami, H., Norimatsu, T., Tsubakimoto, K., Kawanaka, J., Tokita, S., Miyanaga, N., Shiraga, H., Sakawa, Y., Nakai, M., Azechi, H., Fujioka, S., Kodama, R.

“…High energy density physics is the field of physics dedicated to the study of matter and plasmas in extreme conditions of temperature, densities and pressures…”
Get full text

Boosting laser-ion acceleration with multi-picosecond pulses by Yogo, A., Mima, K., Iwata, N., Tosaki, S., Morace, A., Arikawa, Y., Fujioka, S., Johzaki, T., Sentoku, Y., Nishimura, H., Sagisaka, A., Matsuo, K., Kamitsukasa, N., Kojima, S., Nagatomo, H., Nakai, M., Shiraga, H., Murakami, M., Tokita, S., Kawanaka, J., Miyanaga, N., Yamanoi, K., Norimatsu, T., Sakagami, H., Bulanov, S. V., Kondo, K., Azechi, H.

“…Using one of the world most powerful laser facility, we demonstrate for the first time that high-contrast multi-picosecond pulses are advantageous for proton…”
Get full text

Thermal Spray Using a High-Frequency Pulse Detonation Combustor Operated in the Liquid-Purge Mode by Endo, T., Obayashi, R., Tajiri, T., Kimura, K., Morohashi, Y., Johzaki, T., Matsuoka, K., Hanafusa, T., Mizunari, S.

“…Experiments on thermal spray by pulsed detonations at 150 Hz were conducted. Two types of pulse detonation combustors were used, one operated in the inert gas…”
Get full text

Monte Carlo particle collision model for qualitative analysis of neutron energy spectra from anisotropic inertial confinement fusion by Abe, Y., Johzaki, T., Sunahara, A., Arikawa, Y., Ozaki, T., Ishii, K., Hanayama, R., Okihara, S., Miura, E., Komeda, O., Sakata, S., Matsuo, K., Morita, H., Takizawa, R., Mizutani, R., Iwamoto, A., Sakagami, H., Sentoku, Y., Shiraga, H., Nakai, M., Fujioka, S., Mori, Y., Kitagawa, Y.

“…A Monte Carlo (MC) code simulating the kinetics of two-particle collisions has shown to have certain advantages in the spectral analysis of neutrons from…”
Get full text

Effects of hydrogen concentration in ablator material on stimulated Raman scattering, two-plasmon decay, and hot electrons for direct-drive inertial confinement fusion by Kawasaki, K., Cristoforetti, G., Idesaka, T., Hironaka, Y., Tanaka, D., Batani, D., Fujioka, S., Gizzi, L. A., Hata, M., Johzaki, T., Katagiri, K., Kodama, R., Matsuo, S., Nagatomo, H., Nicolai, Ph, Ozaki, N., Sentoku, Y., Takizawa, R., Yogo, A., Yamada, H., Shigemori, K.

“…Laser plasma instabilities, such as stimulated Raman scattering (SRS) and two-plasmon decay (TPD), are basic phenomena in intense laser science and…”
Get full text

Verification of fast heating of core plasmas produced by counter-illumination of implosion lasers by Miura, E., Mori, Y., Ishii, K., Sakata, S., Abe, Y., Arikawa, Y., Nakajima, N., Takizawa, R., Morita, H., Matsuo, K., Mirfayzi, S.R., Sunahara, A., Ozaki, T., Iwamoto, A., Komeda, O., Hanayama, R., Okihara, S., Sentoku, Y., Fujioka, S., Sakagami, H., Johzaki, T., Kitagawa, Y.

“…We conducted fast heating of a core plasma produced by counter-illumination of two beam bundles of implosion lasers for two incident directions of the heating…”
Get full text

Experimental evidence of impact ignition: 100-fold increase of neutron yield by impactor collision by Azechi, H, Sakaiya, T, Watari, T, Karasik, M, Saito, H, Ohtani, K, Takeda, K, Hosoda, H, Shiraga, H, Nakai, M, Shigemori, K, Fujioka, S, Murakami, M, Nagatomo, H, Johzaki, T, Gardner, J, Colombant, D G, Bates, J W, Velikovich, A L, Aglitskiy, Y, Weaver, J, Obenschain, S, Eliezer, S, Kodama, R, Norimatsu, T, Fujita, H, Mima, K, Kan, H

“…We performed integrated experiments on impact ignition, in which a portion of a deuterated polystyrene (CD) shell was accelerated to about 600 km/s and was…”
Get full text

Hot electron spectra in hole-cone shell targets and a new proposal of the target for fast ignition in laser fusion by Ozaki, T, Sunahara, A, Shiraga, H, Arikawa, Y, Fujioka, S, Sakagami, H, Zhang, Z, Nagatomo, H, Johzaki, T, Namimoto, T, Taga, M, Kojima, S, Abe, Y, Ishihara, K, Nagai, T, Sakata, S, Hattori, S, Sakawa, Y, Nishimura, H, Azechi, H

“…The traditional fast ignition scheme is that a compressed core created using an imploding laser is auxiliary heated and ignited by hot electrons (produced…”
Get full text

Fast electron beam guiding for effective core heating by Johzaki, T., Sunahara, A., Fujioka, S., Nagatomo, H., Sakagami, H., Mima, K.

“…In cone-guiding fast ignition, the guiding of fast electron beam with significantly large beam divergence is one of the most important issues for achieving…”
Get full text

Suppression effects of Weibel instability for fast electron divergence by Sakagami, H., Johzaki, T., Taguchi, T., Mima, K.

“…Quasi-static magnetic fields, which are induced by the Weibel instability and grow to more than hundred Megagauss, lead to large divergence angle of fast…”
Get full text

Effects of laser temporal profile on fast electron characteristics by Hata, M., Sakagami, H., Johzaki, T., Nagatomo, H.

“…2D PIC simulations for fast ignition with a planar target and an ultrahigh intensity laser have been performed to investigate effects of laser temporal profile…”
Get full text

Kinetic effects and nonlinear heating in intense x-ray-laser-produced carbon plasmas by Sentoku, Y, Paraschiv, I, Royle, R, Mancini, R C, Johzaki, T

“…The x-ray laser-matter interaction for a low-Z material, carbon, is studied with a particle-in-cell code that solves the photoionization and x-ray transport…”
Get full text

Present states and future prospect of fast ignition realization experiment (FIREX) with Gekko and LFEX Lasers at ILE by Koga, Mayuko, Arikawa, Y., Azechi, H., Fujimoto, Y., Fujioka, S., Habara, H., Hironaka, Y., Homma, H., Hosoda, H., Jitsuno, T., Johzaki, T., Kawanaka, J., Kodama, R., Mima, K., Miyanaga, N., Murakami, M., Nagatomo, H., Nakai, M., Nakata, Y., Nakamura, H., Nishimura, H., Norimatsu, T., Sakawa, Y., Sarukura, N., Shigemori, K., Shiraga, H., Shimizu, T., Takabe, H., Tanabe, M., Tanaka, K.A., Tanimoto, T., Tsubakimoto, T., Watari, T., Sunahara, A., Isobe, M., Iwamoto, A., Mito, T., Motojima, O., Ozaki, T., Sakagami, H., Taguchi, T., Nakao, Y., Cai, H., Key, M., Norreys, P., Pasley, J.

“…The fast ignition realization experiment (FIREX) project is progressing. The new short pulse laser system, LFEX laser, has been completely assembled and one of…”
Get full text

Optimum design of imploded core plasma for effective fast ignition at GXII by Nagatomo, H., Johzaki, T., Sunahara, A., Sakagami, H., Yanagawa, T., Mima, K.

“…In the implosion phase of the fast ignition scheme, most critical issues are breakup of the cone tip and the formation of high [rho]-R core plasma to improve…”
Get full text

X-ray line polarization spectroscopy to study hot electron transport in ultra-short laser produced plasma by Inubushi, Y., Nishimura, H., Ochiai, M., Fujioka, S., Johzaki, T., Mima, K., Kawamura, T., Nakazaki, S., Kai, T., Sakabe, S., Izawa, Y.

“…Observation is reported of the polarization of the helium-like Cl–He α line (1s 2 1S 0–1s2p 1P 1), at 2.79 keV emitted from a triple-layer target irradiated…”
Get full text

Integrated experiments of fast ignition targets by Gekko-XII and LFEX lasers by Shiraga, H., Fujioka, S., Nakai, M., Watari, T., Nakamura, H., Arikawa, Y., Hosoda, H., Nagai, T., Koga, M., Kikuchi, H., Ishii, Y., Sogo, T., Shigemori, K., Nishimura, H., Zhang, Z., Tanabe, M., Ohira, S., Fujii, Y., Namimoto, T., Sakawa, Y., Maegawa, O., Ozaki, T., Tanaka, K.A., Habara, H., Iwawaki, T., Shimada, K., Nagatomo, H., Johzaki, T., Sunahara, A., Murakami, M., Sakagami, H., Taguchi, T., Norimatsu, T., Homma, H., Fujimoto, Y., Iwamoto, A., Miyanaga, N., Kawanaka, J., Jitsuno, T., Nakata, Y., Tsubakimoto, K., Sueda, K., Morio, N., Matsuo, S., Kawasaki, T., Sawai, K., Tsuji, K., Murakami, H., Kanabe, T., Kondo, K., Kodama, R., Sarukura, N., Shimizu, T., Mima, K., Azechi, H.

“…Implosion and heating experiments at the Institute of Laser Engineering, Osaka University on Fast Ignition (FI) targets for the FIREX-1 project have been…”
Get full text

Quantitative measurement of hard X-ray spectra from laser-driven fast ignition plasma by Zhang, Z., Nishimura, H., Namimoto, T., Fujioka, S., Arikawa, Y., Nagatomo, H., Nakai, M., Ozaki, T., Koga, M., Johzaki, T., Sunahara, A., Chen, H., Park, J., Williams, G.J., Shiraga, H., Kojima, S., Nishikino, M., Kawachi, T., Hosoda, H., Okano, Y., Miyanaga, N., Kawanaka, J., Nakata, Y., Jitsuno, T., Azechi, H.

“…Absolute Kα line spectroscopy is proposed for studying laser–plasma interactions taking place in the Au cone-guided fast ignition targets. X-ray spectra…”
Get full text

Efficient multi-keV X-ray generation from high-contrast laser plasma interaction by Zhang, Z., Nishimura, H., Nishikino, M., Sunahara, A., Johzaki, T., Cai, H.B., Kawachi, T., Pirozhkov, A.S., Sagisaka, A., Orimo, S., Ogura, K., Yogo, A., Okano, Y., Ohshima, S., Fujioka, S., Kiriyama, H., Kondo, K., Shimomura, T., Kanazawa, S.

“…K alpha line emission from Mo was experimentally and theoretically studied using clean, ultrahigh-intensity femtosecond laser pulses. The absolute yields of K…”
Get full text

Implosion and heating experiments of fast ignition targets by Gekko-XII and LFEX lasers by Shiraga, H., Fujioka, S., Nakai, M., Watari, T., Nakamura, H., Arikawa, Y., Hosoda, H., Nagai, T., Koga, M., Kikuchi, H., Ishii, Y., Sogo, T., Shigemori, K., Nishimura, H., Zhang, Z., Tanabe, M., Ohira, S., Fujii, Y., Namimoto, T., Sakawa, Y., Maegawa, O., Ozaki, T., Tanaka, K.A., Habara, H., Iwawaki, T., Shimada, K., Key, M., Norreys, P., Pasley, J., Nagatomo, H., Johzaki, T., Sunahara, A., Murakami, M., Sakagami, H., Taguchi, T., Norimatsu, T., Homma, H., Fujimoto, Y., Iwamoto, A., Miyanaga, N., Kawanaka, J., Kanabe, T., Jitsuno, T., Nakata, Y., Tsubakimoto, K., Sueda, K., Kodama, R., Kondo, K., Morio, N., Matsuo, S., Kawasaki, T., Sawai, K., Tsuji, K., Murakami, H., Sarukura, N., Shimizu, T., Mima, K., Azechi, H.

“…The FIREX-1 project, the goal of which is to demonstrate fuel heating up to 5 keV by fast ignition scheme, has been carried out since 2003 including…”
Get full text