Beam-based offset calibration of the PLS BPM

Author

Huang, J.-Y. ; Jung, D.H. ; Kim, K.H. ; Nam, S.H. ; Yoon, M. ; Ko, I.S.

Author_Institution

Accel. Lab., Pohang Inst. of Sci. & Technol., South Korea

Volume

2

fYear

1997

fDate

12-16 May 1997

Firstpage

2107

Abstract

There are 108 beam position monitors in the PLS for the orbit measurement and closed orbit correction. As the BPM pickup electrodes are assembled directly on the 10 m-long vacuum chamber, calibration of the electrical center of BPMs have been done with the external RF transmission-reflection method. Since the closed orbit distortion is still larger than 500 μm RMS, we are developing the beam-based calibration method for the BPMs in PLS to improve the accuracy of the absolute position reading. In this report we present the method of beam-based calibration of BPMs and its experimental results

Keywords

X-ray production; accelerator RF systems; calibration; electron accelerators; particle beam diagnostics; position measurement; storage rings; 10 m; PLS BPM; Pohang Light Source; absolute position reading; beam position monitors; beam-based offset calibration; closed orbit correction; closed orbit distortion; electron storage ring; external RF transmission-reflection method; orbit measurement; pickup electrodes; synchrotron light source; vacuum chamber; Calibration; Circuit testing; Distortion measurement; Electric variables measurement; Electrodes; Extraterrestrial measurements; Laboratories; Magnetic field measurement; Magnets; Storage rings;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.751123

Filename

751123