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

A numerical alignment error estimation for the SPring-8-II

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

1 West

Wilson Hall

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


Dr Yuichi Okayasu (Japan Synchrotron Radiation Research Institute (SPring-8))


Trends of accelerator components coordinates on the storage ring, which are designed as the SPring-8-II, are calculated with ground deformation growth rates. The rates are evaluated based on survey data measured since 1996 for the existing SPring-8 accelerator components. Next, alignment errors for all neighboring two magnet-girders are numerically estimated as relative error ellipses via a surveying network analysis assuming our current measurement schemes and confirmed to be settled within a tolerance, which is designed by our beam optics group. Levels of the storage ring components are known to be displacing ~2.5 mm for almost 20 years clearly depending on underground components such as underpasses, RF wave-guides, tunnels and cutting or banking structures. A necessity of the realignment for the upgrade configuration are estimated. In addition, a verification of the ATL-law application via a classical approach for variances of the storage ring level is briefly introduced and discussed.

Primary author

Dr Yuichi Okayasu (Japan Synchrotron Radiation Research Institute (SPring-8))


Dr Hiroaki Kimura (Japan Synchrotron Radiation Research Institute (SPring-8)) Dr Sakuo Matsui (RIKEN)

Presentation materials