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TY - CONF AU - Matsunaga, H. AU - Masuzawa, M. AU - Ohsawa, Y. AU - Sugahara, R. AU - Yamaoka, H. AU - Yoshioka, H. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Feasibility Study on Measurement and Control of Relative Positioning for Nano-beam Collision J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - In the SuperKEKB and future International Linear Collider project, it is required to measure and control an offset of very small beams with a precision of several nanometers at the interaction point. This paper is a feasibility study on measuring and controlling nano-order relative position by using a laser interferometer and a piezoelectric stage. The first part shows that the precision of measurement position about a direction of laser radiation is less than or equal to 1 nanometer in frequency region less than 100Hz. The second part is discussed a measurement of relative displacement between two points which are 10 meter away on substructures located at the interaction point in the SuperKEKB. To compare with difference of accelerometers for reference, a relative displacement measurement with a precision of several nanometers by a laser interferometer became clear. The final part is discussed a relative positioning control by using a Piezo-Stage between two points on active vibration isolation tables. We achieved to control a relative displacement below 2 nanometers in frequency region less than 10Hz. PB - JACoW CP - Geneva, Switzerland SP - 933 EP - 936 KW - laser KW - controls KW - alignment KW - acceleration KW - superconducting-magnet DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-MOPHA060 UR - http://jacow.org/ipac2015/papers/mopha060.pdf ER -