Beam commissioning of the PEP-II High Energy Ring

Author

Wienands, U. ; Anderson, S. ; Assmann, R. ; Bharadwaj, V. ; Cai, Y. ; Clendenin, J. ; Corredoura, P. ; Decker, F.J. ; Donald, M. ; Ecklund, S. ; Emma, P. ; Erickson, R. ; Fox, J. ; Fieguth, I. ; Fisher, Amnon ; Heifets, S. ; Hill, A. ; Himel, T. ; Iverson

Author_Institution

Linear Accel. Lab., Stanford Univ., CA, USA

Volume

5

fYear

1999

fDate

1999

Firstpage

2993

Abstract

The PEP-II High Energy Ring (HER), a 9 GeV electron storage ring, has been in commissioning since spring 1997. Initial beam commissioning activities focused on systems checkout and commissioning and on determining the behaviour of the machine systems at high beam currents, This phase culminated with the accumulation of 0.75 A of stored beam-sufficient to achieve design luminosity-in January 1998 after 3.5 months of beam time. Collisions with the 3 GeV positron beam of the Low Energy Ring (LER) were achieved in Summer of 1998. At high beam currents, collective instabilities have been seen. Since then, commissioning activities for the HER have shifted in focus towards characterization of the machine and a rigorous program to understand the machine and the beam dynamics is presently underway

Keywords

colliding beam accelerators; electron accelerators; particle beam dynamics; particle beam stability; storage rings; 9 GeV; PEP-II High Energy Ring; beam commissioning activities; beam dynamics; collective instabilities; electron storage ring; machine systems; systems checkout; Electrons; Energy storage; Linear accelerators; Magnets; Positrons; Springs; Tin;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.792123

Filename

792123