Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792123
