Automated beam based alignment of the ALS quadrupoles

Author

Portmann, G. ; Robin, D. ; Schachinger, L.

Author_Institution

Lawrence Berkeley Lab., CA, USA

Volume

4

fYear

1995

fDate

1-5 May 1995

Firstpage

2693

Abstract

Knowing the electrical offset of the storage ring beam position monitors (BPM) to an adjacent quadrupole magnetic center is important in order to correct the orbit in the ring. We describe a simple, fast and reliable technique to measure the BPM electrical centers relative to the quadrupole magnetic centers. By varying individual quadrupole magnets and observing the effects on the orbit we were able to measure the BPM offsets in half the horizontal and vertical BPMs (48) in the ALS. These offsets were measured to an accuracy of better than 50 μm. The technique is completely automated and takes less than 3 hours for the whole ring

Keywords

accelerator control systems; accelerator magnets; beam handling techniques; computerised instrumentation; electron accelerators; particle beam diagnostics; storage rings; 3 h; ALS quadrupoles; adjacent quadrupole magnetic center; automated beam based alignment; electrical centers; electrical offset; storage ring beam position monitors; Electric variables measurement; Equations; Extraterrestrial measurements; Jitter; Laboratories; Magnets; Motion measurement; Power supplies; Storage rings; Structural beams;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505662

Filename

505662