Search

Your search keyword '"Tokita S"' showing total 412 results
Start Over Author "Tokita S"
412 results on '"Tokita S"'

1. Compact highly efficient 2.1-W continuous-wave mid-IR Fe:ZnSe coherent source pumped by Er:ZBLAN fiber laser

Author

Pushkin, A. V., Migal, E. A., Uehara, H., Goya, K., Tokita, S., Frolov, M. P., Korostelin, Yu. V., Kozlovsky, V. I., Skasyrsky, Ya. K., and Potemkin, F. V.

Subjects
Physics - Optics
Abstract

We report the compact and robust coherent source operating in mid-IR based on Fe:ZnSe chalcogenide gain medium optically pumped by Er:ZBLAN fiber laser. The output power of 2.1 W with 59% slope efficiency with respect to absorbed pump power at liquid nitrogen cooling is achieved. We show that strong re-absorption at high pump power and iron ion doping concentrations leads to the continuous tuning of central wavelength from 4012 to 4198 nm. Robustness of high power Er:ZBLAN fiber laser combined with prominent spectroscopic properties of Fe:ZnSe media pave the way for the development of reliable tunable CW mid-IR sources for scientific and industrial purposes.

Published
2018
Full Text
View/download PDF

3. Laser-ion acceleration via anomalous electron heating

Author

Yogo, A., Mima, K., Iwata, N., Tosaki, S., Morace, A., Arikawa, Y., Fujioka, S., Nishimura, H., Sagisaka, A., Johzaki, T., 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., and Azechi, H.

Subjects
Physics - Plasma Physics
Abstract

Using a kilojoule class laser, we demonstrate for the first time that high-contrast picosecond pulses are advantageous for ion acceleration. We show that a laser pulse with optimum duration and a large focal spot accelerates electrons beyond the ponderomotive energy. This anomalous electron heating enables efficient ion acceleration reaching 52 MeV at an intensity of 1.2X10^19 Wcm^-2. The proton energy observed agrees quantitatively with a one-dimensional plasma expansion model newly developed by taking the anomalous heating effect into account. The heating process is confirmed by both measurements with an electron spectrometer and a one-dimensional particle-in-cell simulation. By extending the pulse duration to 6 ps, 5% energy conversion efficiency to protons (50 J out of 1 kJ laser energy) is achieved with an intensity of 10^18-Wcm^-2. The present results are quite encouraging for realizing ion-driven fast ignition and novel ion beamlines., Comment: This paper has been withdrawn by the author to revise the theoretical model on the ion acceleration

Published
2016

5. Hot electron and ion spectra on blow-off plasma free target in GXII-LFEX direct fast ignition experiment

Author

Ozaki, T., primary, Abe, Y., additional, Arikawa, Y., additional, Sentoku, Y., additional, Kawanaka, J., additional, Tokita, S., additional, Miyanaga, N., additional, Jitsuno, T., additional, Nakata, Y., additional, Tsubakimoto, K., additional, Sunahara, A., additional, Jhozaki, T., additional, Miura, E., additional, Komeda, O., additional, Iwamoto, A., additional, Sakagami, H., additional, Okihara, S., additional, Ishii, K., additional, Hanayama, R., additional, Mori, Y., additional, and Kitagawa, Y., additional

Published
2023
Full Text
View/download PDF

6. Enhancing laser beam performance by interfering intense laser beamlets

Author

Morace, A., Iwata, N., Sentoku, Y., Mima, K., Arikawa, Y., Yogo, A., Andreev, A., Tosaki, S., Vaisseau, X., Abe, Y., Kojima, S., Sakata, S., Hata, M., Lee, S., Matsuo, K., Kamitsukasa, N., Norimatsu, T., Kawanaka, J., Tokita, S., Miyanaga, N., Shiraga, H., Sakawa, Y., Nakai, M., Nishimura, H., Azechi, H., Fujioka, S., and Kodama, R.

Published
2019
Full Text
View/download PDF

25. Boosting laser-ion acceleration with multi-picosecond pulses

Author

Yogo, A., primary, Mima, K., additional, Iwata, N., additional, Tosaki, S., additional, Morace, A., additional, Arikawa, Y., additional, Fujioka, S., additional, Johzaki, T., additional, Sentoku, Y., additional, Nishimura, H., additional, Sagisaka, A., additional, Matsuo, K., additional, Kamitsukasa, N., additional, Kojima, S., additional, Nagatomo, H., additional, Nakai, M., additional, Shiraga, H., additional, Murakami, M., additional, Tokita, S., additional, Kawanaka, J., additional, Miyanaga, N., additional, Yamanoi, K., additional, Norimatsu, T., additional, Sakagami, H., additional, Bulanov, S. V., additional, Kondo, K., additional, and Azechi, H., additional

Published
2017
Full Text
View/download PDF

40. Pharmacological Characterization of TASP0412098, A Selective CRTH2 (Chemoattractant Receptor-Homologous Molecule Expressed on Th2 Cells) Antagonist

Author

Kawanishi, M., primary, Watanabe, K., additional, Asakura, Y., additional, Oka, A., additional, Naruse, T., additional, Nishikawa, R., additional, Takayama, T., additional, Koami, T., additional, Wakasugi, D., additional, Kawamura, M., additional, Takaoka, A., additional, and Tokita, S., additional

Published
2012
Full Text
View/download PDF

45. The effects of a novel histamine-3 receptor inverse agonist on essential tremor in comparison to stable levels of alcohol

Author

Zoethout, RWM, primary, Iannone, R, additional, Bloem, BR, additional, Palcza, J, additional, Murphy, G, additional, Chodakewitz, J, additional, Buntinx, A, additional, Gottesdiener, K, additional, Marsilio, S, additional, Rosen, L, additional, van Dyck, K, additional, Louis, ED, additional, Cohen, AF, additional, Schoemaker, RC, additional, Tokita, S, additional, Sato, N, additional, Koblan, KS, additional, Hargreaves, RH, additional, Renger, JJ, additional, and van Gerven, JMA, additional

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results