Speaker
Dr
Yuichi Okayasu
(Japan Synchrotron Radiation Research Institute (SPring-8))
Description
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))
Co-authors
Dr
Hiroaki Kimura
(Japan Synchrotron Radiation Research Institute (SPring-8))
Dr
Sakuo Matsui
(RIKEN)