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Title |
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| WEPKF048 |
Characteristics of Ground Motion at KEK and SPring-8
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1711 |
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- Y. Nakayama, T. Ito
JPOWER, Kanagawa-ken
- S. Matsui, C. Zhang
JASRI/SPring-8, Hyogo
- R. Sugahara, S. Takeda, H. Yamaoka, M. Yoshioka
KEK, Ibaraki
- S. Yamashita
University of Tokyo, Tokyo
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Authors Y. Nakayama, T. Ito, (JPOWER); R. Sugahara, S. Takeda, H.Yamaoka, M.Yoshioka (KEK); S.Matsui, C.Zhang (SPring-8); S. Yamashita (ICEPP): Abstract Stability of ground is preferable for accelerator beam operation. We have measured ground motion of ground at the KEKB and SPring-8 site, where the ground has quite different characteristics each other. In this paper, some of analysis results are shown, and the characteristics of the ground motion at the KEKB site and those at the Spring-8 site are compared.
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| WEPLT113 |
Development of New Hydrostatic Levelling Equipment for Large Next Generation Accelerator
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2110 |
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The Hydrostatic Levelling Systems (HLS) are installed and commissioned in many laboratories. We have developed a new type hydrostatic levelling equipment for the large future accelerator. The designing points are as followings: (1) use of half filled water level sensor instead of the usual full filled level sensor, (2) the capacitive sensor is supported by an invar rod and (3) use of digitized signal transfer system. These three points are very important factor to apply the leveling system to large next generation accelerator in order to obtain good temperature stability and being free from the environmental electronic noises. We have obtained a typical resolution of the equipment as 0.3 micron-meter, though usual HLS shows the value ten times as much. We are going to show a detailed report about the system including data obtained.
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