@misc{oai:repo.qst.go.jp:00082996, author = {Pirozhkov, Alexander and Sagisaka, Akito and Ogura, Koichi and Timur, Esirkepov and Gonzalez izquierdo, Bruno and N. Shatokhin, A. and A. Vishnyakov, E. and Armstrong, C. and A. Pikuz, T. and A. Alkhimova, M. and A. Pikuz, S. and Yan, W. and M. Jeong, T. and Singh, S. and Hadjisolomou, P. and Finke, O. and Grittani, G. and Nevrkla, M. and Lazzarini, C. and Velyhan, A. and Hayakawa, Takehito and Fukuda, Yuuji and Kevin Koga, James and Ishino, Masahiko and Kondo, Kotaro and Miyasaka, Yasuhiro and Kon, Akira and Nishikino, Masaharu and O. Kolesnikov, A. and N. Ragozin, E. and Khikhlukha, D. and P. Tsygvintsev, I. and A. Gasilov, V. and Kumar, D. and Nejdl, J. and Margarone, D. and Sasorov, P. and Weber, S. and Kando, Masaki and Kiriyama, Hiromitsu and Korn, G. and Neely, D. and Kondo, Kiminori and Bulanov, Sergey and Kawachi, Tetsuya and Pirozhkov, Alexander and Akito, Sagisaka and Koichi, Ogura and Timur, Esirkepov and Gonzalez izquierdo, Bruno and Takehito, Hayakawa and Yuji, Fukuda and Kevin Koga, James and Masahiko, Ishino and Kotaro, Kondo and Yasuhiro, Miyasaka and Akira, Kon and Masaharu, Nishikino and Masaki, Kando and Hiromitsu, Kiriyama and Kiminori, Kondo and Bulanov, Sergey and Tetsuya, Kawachi}, month = {Jun}, note = {We describe our experiment performed with the J-KAREN-P laser at the intensity approaching 10^22 W/cm^2. In particular, we present the results obtained with hard x-ray (0.1-3 MeV) spectrographs comprising 10 scintillators and a method to reconstruct the x-ray spectra., 3rd International Conference on Nuclear Photonics (NP2020)}, title = {Generation of hard x-rays at intensities approaching 10^22 W/cm^2}, year = {2021} }