TY - JOUR
T1 - Progress and application of the Tohoku microbeam system
AU - Matsuyama, S.
AU - Ishii, K.
AU - Yamazaki, H.
AU - Kikuchi, Y.
AU - Inomata, K.
AU - Watanabe, Y.
AU - Ishizaki, A.
AU - Oyama, R.
AU - Kawamura, Y.
AU - Yamaguchi, T.
AU - Momose, G.
AU - Nagakura, M.
AU - Takahashi, M.
AU - Kamiya, T.
N1 - Funding Information:
This study was partly supported by Grants-in-Aid for Scientific Research, (S) No. 13852017, (B) No. 18360450, (C) No. 16560731, and a Grant-in-Aid for Scientific Research in Priority Areas under Grant No. 14048213 from the Ministry of Education, Culture, Sports, Science and Technology, Japan. The authors would like to thank Prof. D.N. Jamieson of the University of Melbourne, for his valuable suggestions and advice in reducing field contamination and introducing the PRAM and OXTRACE computer codes. The authors would like to acknowledge the assistance of Mr. R. Sakamoto and M. Fujisawa for maintenance and operation of the Dynamitron accelerator. The authors would like to thank Mr. K. Komatsu, T. Nagaya and C. Akama for their assistance in constructing the microbeam and target system.
PY - 2007/7
Y1 - 2007/7
N2 - A microbeam system was constructed at the Tohoku University Dynamitron laboratory and optimization of the system was performed. Parasitic field contamination from tungsten carbide slit chips and an annular Si surface barrier detector limited the beam spot size to 2 × 2 μm2. By replacing these components, the parasitic field contamination of the system was reduced and the performance of the microbeam system was remarkably improved. A measured beam spot size of 0.4 × 0.4 μm2 at a beam current of several tens of pA has been accomplished. The results obtained using the grid shadow method show that a beam spot size of less than 0.4 μm is obtainable in the low-current regime. For easy tuning and operation of the microbeam system, a human-machine interface (HMI) was developed based on the user participatory design concept. The HMI has been accepted favorably by users and is used in routine operations. The analysis system has been re-developed and is applicable to simultaneous in-air/in-vacuum PIXE, RBS, SEM, and STIM analyses and 3D μ-CT. The system is now applied for studies in biological, environmental, and other fields.
AB - A microbeam system was constructed at the Tohoku University Dynamitron laboratory and optimization of the system was performed. Parasitic field contamination from tungsten carbide slit chips and an annular Si surface barrier detector limited the beam spot size to 2 × 2 μm2. By replacing these components, the parasitic field contamination of the system was reduced and the performance of the microbeam system was remarkably improved. A measured beam spot size of 0.4 × 0.4 μm2 at a beam current of several tens of pA has been accomplished. The results obtained using the grid shadow method show that a beam spot size of less than 0.4 μm is obtainable in the low-current regime. For easy tuning and operation of the microbeam system, a human-machine interface (HMI) was developed based on the user participatory design concept. The HMI has been accepted favorably by users and is used in routine operations. The analysis system has been re-developed and is applicable to simultaneous in-air/in-vacuum PIXE, RBS, SEM, and STIM analyses and 3D μ-CT. The system is now applied for studies in biological, environmental, and other fields.
KW - 3D μ-CT
KW - Grid shadow method
KW - HMI
KW - Microbeam
KW - Parasitic field contamination
KW - PIXE
KW - RBS
KW - STIM
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U2 - 10.1016/j.nimb.2007.01.277
DO - 10.1016/j.nimb.2007.01.277
M3 - Article
AN - SCOPUS:34249904110
SN - 0168-583X
VL - 260
SP - 55
EP - 64
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1
ER -