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Yang, Y.L.

Paper Title Page
TH6REP081 Calculation and Simulation of the Stripline Kicker Used in HLS 4144
 
  • Y.B. Chen, L. Liu, M. Meng, B. Sun, J.H. Wang, L. Wang, Y.L. Yang, Z.R. Zhou
    USTC/NSRL, Hefei, Anhui
  
 

A bunch-by-bunch analogue transverse feedback system at the Hefei Light Source (HLS) is to cure the resistive wall instability and the transverse coupled bunch instabilities. The kicker of the feedback system has four 21-cm-long electrodes of stripline type mounted in a skew 45°. Calculation and Simulation of the transverse kicker are shown.

  
TH6REP083 Commissioning of the HLS Analog TFB System 4150
 
  • Y.L. Yang, Y.B. Chen, W. Li, L. Liu, M. Meng, B. Sun, J.H. Wang, L. Wang, Z.R. Zhou
    USTC/NSRL, Hefei, Anhui
  
 

As low injection energy and multi-turn injection at HLS, the task of diagnosing and curing coupled-bunch instabilities becomes ever harder. The transverse analog feedback system has been redeveloped to improve effect, recently. In this paper, the new improved designs are described and new system's commissioning results are discussed. The transverse coupled bunch instability at 200MeV injection status is also experimentally studied.

  
TH6REP084 Commissioning of the Digital Transverse Bunch-by-Bunch Feedback System for the HLS 4153
 
  • Z.R. Zhou, Y.B. Chen, M. Meng, B. Sun, J.H. Wang, L. Wang, Y.L. Yang
    USTC/NSRL, Hefei, Anhui
  • K. Kobayashi, T. Nakamura
    JASRI/SPring-8, Hyogo-ken
  
 

Hefei Light Source (HLS) is an 800MeV storage ring with bunch rate of 204 MHz, the harmonics of 45, and circumference of 66 meters. HLS injection works at 200MeV, where the multi-bunch instabilities limit the maximum stored current. A digital transverse bunch-by-bunch feedback system has recently been commissioned at HLS to suppress the multi-bunch instabilities during injection. We employ the SPring-8 FPGA based feedback processor and modified it at NSRL to process horizontal and vertical oscillation signals, independently and simultaneously by one single processor. The design of the digital transverse feedback system and the experiment results are presented in this paper.

  
TH6REP082 Experiment of Transverse Feedback System at HLS 4147
 
  • 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.