@article{oai:repo.qst.go.jp:00048663,
 author = {ピロジコフ, アレキサンダー and エシロケポフ, ティムル and A. Pikuz, T. and Ya. Faenov, A. and 匂坂, 明人 and 小倉, 浩一 and 林, 由紀雄 and 小瀧, 秀行 and N. Ragozin, E. and Neely, D. and コーガ, ジェームズ and 福田, 祐仁 and 錦野, 将元 and 今園, 孝志 and 長谷川, 登 and 河内, 哲哉 and 大道, 博行 and 加藤, 義章 and ブラノフ, セルゲイ and 近藤, 公伯 and 桐山, 博光 and 神門, 正城 and Pirozhkov, Alexander and Timur, Esirkepov and Sagisaka, Akito and Ogura, Koichi and Hayashi, Yukio and Kotaki, Hideyuki and Kevin Koga, James and Fukuda, Yuuji and Nishikino, Masaharu and Imazono, Takashi and Hasegawa, Noboru and Kawachi, Tetsuya and Daido, Hiroyuki and Kato, Yoshiaki and Bulanov, Sergey and Kondo, Kiminori and Kiriyama, Hiromitsu and Kando, Masaki},
 issue = {1},
 journal = {Quantum Beam Science},
 month = {Mar},
 note = {We discuss requirements on relativistic-irradiance (I0 > 10^18 W/cm^2) high-power (multi-terawatt) ultrashort (femtosecond) lasers for efficient generation of high-order harmonics in gas jet targets in a new regime discovered recently (Pirozhkov et al., 2012). Here, we present the results of several experimental campaigns performed with different irradiances, analyse the obtained results and derive the required laser parameters. In particular, we found that the root mean square (RMS) wavefront error should be smaller than ~100 nm (~λ/8). Further, the angular dispersion should be kept considerably smaller than the diffraction divergence, i.e., μrad level for 100–300-mm beam diameters. The corresponding angular chirp should not exceed 10^−2 μrad/nm for a 40-nm bandwidth. We show the status of the J-KAREN-P laser (Kiriyama et al., 2015; Pirozhkov et al., 2017) and report on the progress towards satisfying these requirements.},
 title = {Laser Requirements for High-Order Harmonic Generation by Relativistic Plasma Singularities},
 volume = {2},
 year = {2018}
}