Oct 8 – 12, 2018
US/Central timezone
IWAA 2018 group picture is available to download


Oct 11, 2018, 9:00 AM
1 West (Wilson Hall)

1 West

Wilson Hall

Survey & Alignment Aspects of Light Sources Survey & Alignment Aspects of Light Sources


Dr Chenghao Yu (Brookhaven National Laboratory)


Vibrating wire technique is mainly used in NSLS-II project to fulfil the alignment specification of ±30 micron to 6 or 7 main magnets in each girder assembly. The center of magnet can be characterized with an accuracy of better than 10 micron. The magnets have been fiducialized mechanically so that they can be coarsely aligned on girder within 100 micron accuracy. Although vibrating wire technique makes the fiducialization process less important, each magnet has been precisely surveyed mechanically. By comparing the mechanical center deviation of magnets when they are aligned with respect to each other by vibrating wire technique, the fiducialization precision of mechanical method can be estimated. This information is useful for the accelerators which adopt the method of fiducialization mechanically.

Primary author

Dr Chenghao Yu (Brookhaven National Laboratory)


Matthew Ilardo (Brookhaven National Lab) Ming Ke (BNL) Dr Sushil Sharma (Brookhaven National Lab)

Presentation materials