@article{oai:repo.qst.go.jp:00044847,
 author = {Shirai, Toshiyuki and Ikegami, Masahiro and Fujimoto, Shinji and Tanabe, Mikio and Tongu, H and Noda, Akira and Noda, Kouji and Fujimoto, Tetsuya and Iwata, Souma and Shibuya, Shinji and Smirnov, Alexander and Meshkov, I and Fadil, Hicham and Grieser, Manfred and 白井 敏之 and 藤本 慎司 and 田辺 幹夫 and 野田 章 and 野田 耕司},
 issue = {20},
 journal = {Physical Review Letters},
 month = {May},
 note = {The ordering of protons has been observed at a new storage ring, S-LSR, at Kyoto University. Abrupt jumps in the momentum spread and the Schottky noise power were observed for protons for the first time at a particle number of about 2000, upon applying electron cooling with electron currents of 25, 50, and 100 mA. The transition temperature was 0.17 and 1 meV in the longitudinal and transverse directions, respectively. The transverse temperature of the proton beam was much below that of electrons at the transition, which played an essential role in the ordering of protons.},
 pages = {204801-1--204801-4},
 title = {One-Dimensional Beam Ordering of Protons in a Storage Ring},
 volume = {98},
 year = {2007}
}