Beam based alignment of BPM and orbit stabilization at the Photon Factory storage ring

Author

Honda, T. ; Obina, T. ; Miyajima, T. ; Kobayashi, Y.

Author_Institution

KEK, Tsukuba, Japan

Volume

2

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1366

Abstract

Beam orbit of the PF ring is adjusted to deliver the photon beams on the proper axes of all experimental beam lines. During the user time, the beam orbit is maintained at the reference orbit by an orbit feedback system. In the vertical direction, the feedback was performed at a high repetition rate as 10 ms. In order to improve the stability and reliability of the beam position measurement, we have continued the beam based alignment of BPM. The remnant errors in the BPM offsets were estimated at all BPMs. A systematic error was found out at a specific part of the ring. We could fix a BPM that had an offset drift depending on the beam current. The amount of the drift was determined by the beam-based measurement

Keywords

electron accelerators; particle beam diagnostics; storage rings; Photon Factory storage ring; beam based alignment; beam position measurement; beam position monitors; beam-based measurement; offset drift; orbit feedback system; orbit stabilization; photon beams; reference orbit; remnant errors; systematic error; Control systems; Extraterrestrial measurements; Feedback loop; Magnetic variables control; Magnets; Production facilities; Stability; Storage rings; Switches; Undulators;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.986682

Filename

986682