• C. Zhang, L. Ma, G. Pei, J.Q. Wang
  IHEP Beijing, Beijing

BEPCII is major upgrades of BEPC (Beijing Electron-Positron Collider). It is a double ring e±e collider as well as a synchrotron radiation (SR) source with its outer ring, or SR ring. As a collider, BEPCII operates in the beam energy region of 1-2.1 GeV with design luminosity of 1*10³³cm^-2s^-1 at 1.89 GeV. As a light source, the SR ring operates at 2.5 GeV and 250 mA. Construction of the project started in the beginning of 2004. Installation of the storage ring components completed in October 2007. The BESIII detector was moved to the Interaction Region (IR) on May 6, 2008. In accordance to the progress of construction, the beam commissioning of BEPCII is carried out in 3 phases: Phase 1, with conventional magnets instead of the superconducting insertion magnets (SIM’s)n in the IR; Phase 2, with SIM’s in the IR; Phase 3, joint commissioning with the detector. The maximum luminosity reached to 2.3*10³²cm^-2s^-1. This paper summarizes progress of the construction and commissioning in 3 phases, while focusing on the third phase.

* On behalf of the BEPCII Team

Slides

• J.H. Wang, Y.B. Chen, W. Li, L. Liu, M. Meng, B. Sun, L. Wang, Y.L. Yang, Z.R. Zhou
  USTC/NSRL, Hefei, Anhui
• J. Cao, J. Yue
  IHEP Beiing, Beijing
• D.K. Liu
  SINAP, Shanghai
• L. Ma
  IHEP Beijing, Beijing
• K.R. Ye
  SSRF, Shanghai

In this paper, we introduce the BxB transverse feedback systems at Hefei Light Source (HLS), which employ an analog system and a digital system. The construction and commissioning for two feedback systems, as well as the instability analysis of beam and the experiment result of the feedback system in HLS are also presented in this paper.