Beam based alignment and its relevance in Indus-2
- 1 September 2015
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 86 (9), 093303
- https://doi.org/10.1063/1.4930277
Abstract
Initially in the Indus-2 storage ring, the closed orbit distortion (COD) could be best corrected to 1.3 mm rms in the horizontal and 0.43 mm rms in the vertical plane. The strength of the corrector magnets required high values for COD correction. This revealed that offsets in COD readout by the beam position monitors (BPMs) played a role in not achieving a rms COD lower than the above value. Thus, the offset between the electrical center of BPMs and the magnetic center of the nearest quadrupole magnet could be estimated using the beam based alignment (BBA) method. It prefers that the quadrupole magnet is able to be controlled individually and active shunt power supply (ASPS) system was designed for this purpose that works efficiently. This paper describes the methodology of BBA, topology of ASPS and its performance, and COD minimization using the measured BPM offsets. After BBA, the COD could be reduced to 0.45 mm rms and 0.2 mm rms in horizontal and vertical planes, respectively.This publication has 8 references indexed in Scilit:
- Bipolar active shunt with bidirectional utility interface for the quadrupole magnets of Indus-2Published by Institute of Electrical and Electronics Engineers (IEEE) ,2014
- Measurement, analysis and correction of the closed orbit distortion in Indus-2 synchrotron radiation sourcePramana, 2013
- Measurement of parameters in Indus-2 synchrotron radiation sourceReview of Scientific Instruments, 2012
- Beam based alignment of the SSRF storage ringChinese Physics C, 2009
- Corrector-based magnet alignment procedureNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2008
- Automated beam based alignment of the ALS quadrupolesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Estimation and measurement of effective beam position monitor offsets by using a stored beamNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001
- A beam position measurement system using quadrupole magnets magnetic centra as the position referenceNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994