TY - JOUR
T1 - Upgrading of the 4.5 MV Dynamitron accelerator at Tohoku University for microbeam and nanobeam applications
AU - Matsuyama, S.
AU - Ishii, Keizo
AU - Fujisawa, M.
AU - Kawamura, Y.
AU - Tsuboi, S.
AU - Yamanaka, K.
AU - Watanabe, M.
AU - Hashimoto, Y.
AU - Ohkura, S.
AU - Fujikawa, M.
AU - Nagaya, T.
AU - Komatsu, K.
AU - Yamazaki, H.
AU - Kikuchi, Y.
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.
PY - 2009/6/15
Y1 - 2009/6/15
N2 - To improve the beam brightness and the stability of the accelerator for nanobeam and microbeam applications, the Dynamitron accelerator was upgraded. Although the microbeam system at Tohoku University can focus the beam to several hundred square micrometers, its beam currents were insufficient for analyses of sub-micrometer resolution because of the lack of the accelerator brightness. For this upgrade, an ion source, with lenses in the terminal, and an acceleration tube were replaced with new ones. A control system for the ion source and lens system was also newly developed. Beam brightness of 2.6 and 0.44 pA μm-2 mrad-2 MeV-1 is currently obtained for H2+ and H1+ beams at half divergence of 0.07 mrad. The voltage stability of the accelerator was improved by adjusting the voltage stabilizing system, thereby improving the beam current stability. The Dynamitron accelerator has been operated routinely for various experiments without a serious problem.
AB - To improve the beam brightness and the stability of the accelerator for nanobeam and microbeam applications, the Dynamitron accelerator was upgraded. Although the microbeam system at Tohoku University can focus the beam to several hundred square micrometers, its beam currents were insufficient for analyses of sub-micrometer resolution because of the lack of the accelerator brightness. For this upgrade, an ion source, with lenses in the terminal, and an acceleration tube were replaced with new ones. A control system for the ion source and lens system was also newly developed. Beam brightness of 2.6 and 0.44 pA μm-2 mrad-2 MeV-1 is currently obtained for H2+ and H1+ beams at half divergence of 0.07 mrad. The voltage stability of the accelerator was improved by adjusting the voltage stabilizing system, thereby improving the beam current stability. The Dynamitron accelerator has been operated routinely for various experiments without a serious problem.
KW - Brightness
KW - Microbeam
KW - Nanobeam
KW - Upgrade
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U2 - 10.1016/j.nimb.2009.03.028
DO - 10.1016/j.nimb.2009.03.028
M3 - Article
AN - SCOPUS:66349084974
SN - 0168-583X
VL - 267
SP - 2060
EP - 2064
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 - 12-13
ER -