Preliminary results of microbeam at Tohoku University

S. Matsuyama, K. Ishii, H. Yamazaki, R. Sakamoto, M. Fujisawa, Ts Amartaivan, Y. Ohishi, M. Rodriguez, A. Suzuki, T. Kamiya, M. Oikawa, K. Arakawa, N. Matsumoto

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)


A microbeam system is under construction in the Dynamitron laboratory at Tohoku University for the purpose of applying X-rays produced by a microproton beam as monochromatic X-ray point source to biological and materials research etc. The system consists of a dedicated beam line with a doublet quadrupole and a slit-system of microslits, divergence-defining slits and baffle slits connected to the 4.5 MV Dynamitron accelerator's energy analyzing system, which was a newly installed second analyzing magnet. The demagnification factors are 8.0 and 27.5 for horizontal and vertical planes, respectively. Performance of the microbeam system was tested by beam scanning across the surface of a copper mesh sample (1000 lines/inch) and measuring the X-ray spectrum. A beam spot size of 2×2 μm2, which is larger than the design goal, is currently obtained. We are now adjusting the whole system to achieve a beam spot size of 1×1 μm2.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Publication statusPublished - 2003 Sept
Event8th International Conference on Nuclear Microprobe Technology - Takasaki, Japan
Duration: 2002 Sept 82002 Sept 13


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