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| TUPMA020 |
Beam Based Alignment and COD Correction for the Siam Photon Source
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130 |
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- S. Rugmai, S. Rugmai
Suranaree University of Technology, Nakhon Ratchasima
- P. Klysubun, C. Kwankasem, P. Sudmuang
NSRC, Nakhon Ratchasima
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The first systematic Beam based Alignment (BBA) and COD correction attempt for the Siam Photon Source has been performed. Automated measurements were carried out using MATLAB OPC Toolbox, interfacing to the PLCs of the accelerator control system. Calculations of theoretical parameters were performed with Accelerator Toolbox via MATLAB interface. Since the Beam Position Monitors (BPMs) were not properly calibrated prior to installation beam based calibrations were carried out. Preliminary calibration factors for each BPM were obtained by normalizing BPM signals to modeled steering magnet responses. Measurements of offsets between BPM and quadrupole centers were performed by fitting for minima of orbit response to changes of quadrupole strengths. The resulting offsets were superimposed to the BPM readings in the PLC. COD correction was then performed.
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