Response-time improved hydrothermal-method-grown ZnO scintillator for soft x-ray free-electron laser timing-observation

Shimizu, Toshihiko; Yamamoi, Kohei; Estacio, Elmer; Nakazato, Tomoharu; Sakai, Kouhei; Sarukura, Nobuhiko; Ehrentraut, Dirk; Fukuda, Tsuguo; Nagasono, Mitsuru; Togashi, Tadashi; Higashiya, Atsushi; Yabashi, Makina; Ishikawa, Tetsuya; Ohashi, Haruhiko; Kimura, Hiroaki
March 2010
Review of Scientific Instruments;Mar2010, Vol. 81 Issue 3, p033102
Academic Journal
For pump and probe experiments in x-ray free-electron laser (XFEL) facilities, accurate timing synchronization between short-wavelength femtosecond pulses from XFELs and short optical pulses from other light sources is required. For this purpose, the response time of a hydrothermal-method-grown ZnO is improved by over one order of magnitude via intentional iron ion doping. The fluorescence rise- and decay-time constants are measured to be less than 10 and 100 ps, respectively. Owing to its intense fluorescence even for single pulse XFEL excitation, the timing jitter of the soft x-ray pulse and timing electronics are evaluated to be less than 70 ps.


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