| Paper |
Title |
Page |
| MOACH02 |
The Second Phase Commissioning of BEPCII |
5 |
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- J.Q.Wang, L.Ma and C.Zhang
IHEP, CAS
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BEPCII is the upgrade project of Beijing Electron-Positron Collider (BEPC), which will operate in the beam energy region of 1-2.1 GeV with the design luminosity of 1*10e33 cm-2s-1 at 1.89 GeV. From Nov. 2006 to Aug. 2007, the phase one beam commissioning of BEPCII storage rings was carried out with the so called backup scheme which adopted conventional magnets in the IR instead of the superconducting insertion magnets (SIM). After the SIM was installed into the interaction region, the second phase commissioning began in Oct. 2007. The tuning method for high luminosity but low background has been extensively studied, and the beam current reached more than 1/2 of the design of 0.91 A, with the luminosity higher than 1*10e32 cm-2s-1, which is 10 times of BEPC. In addition, beam was delivered to SR users for about 1 month at 2.5GeV with maximum current over 250mA.
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Transparencies |
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| TUACH08 |
Experimental Background Study in the BEPCII/BESIII |
49 |
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- C.Zhang, D.P. Jin, N. Huang, S.M. Yang, J. Xing,
J.S. Cao, X.Y. Zhao, Q.J. Zhang, Q.B. Wu, Q. Qin, G. Xu, Y.Z. Wu, W.G. Li, Y.F. Wang, C. Zhang, J.Q. Wang, L. Ma, Y.N. Guo,
IHEP, CAS
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Experimental beam-related background study is intro-duced with the BEijing Spectrometor (BESIII) off the interaction region (IR) of the BEPCII [2]. Only safety issues are studied carefully so far for the not good enough detectors’ accuracy. Various experiments are carried out and effective ways to reduce the doses to the IR are found. The results show that the BESIII is safe enough when it is pulled to the IR.
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Transparencies |
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| TUACH13 |
Performance of the Transverse Coupled-Bunch Feedback System in the BEPCII Storage Ring |
63 |
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- J. Yue, L. Ma, J.S. Cao, L. Wang,
IHEP, CAS
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In order to cure the transverse coupled bunch instabilities due to higher order modes of RF cavities and resistive wall impedance in the BEPCII storage ring, an analog bunch-by-bunch feedback system was designed and used. The main components are two sets of beam oscillation detectors, betatron phase adjuster, notch filter and stripline kicker. This paper will describe system parameters, specifications of key components and experiment results.
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Transparencies |
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