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Report No.
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Development of real-time position detection system for single-ion hit

Yokoyama, Akihito; Kada, Wataru*; Sato, Takahiro; Koka, Masashi; Yamamoto, Shunya; Kamiya, Tomihiro; Yokota, Wataru

A system is developed for the real-time position detection of single-ions which hits a target with spatial accuracy about 1 $$mu$$m. The system combines highly luminescent, sensitive, scintillators with a high sensitivity luminescence detection system. The real-time detection system contains a Al$$_{2}$$O$$_{3}$$:Eu scintillator, Eu implanting into $$alpha$$-Al$$_{2}$$O$$_{3}$$. A single-crystal scintillator has been selected since position resolution of emission for powdery scintillator is limited by a grain size, several micrometers for ZnS for example. When the material is irradiated with an electron or ion beam, the Eu is activated and strong luminescence occurs. The detection system includes an image intensifier tube and an electron multiplier CCD camera. The results show that our system can be sufficiently sensitive to detect the hit of a single-ion in real time through simple improvement in emission intensity of the scintillator.

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