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Kawashima, Y.

Paper Title Page
TUPEC045 Requirements on the Pulsed Magnets for the Best Injector Performance 1823
 
  • T.V. Shaftan, A. Blednykh, Y. Kawashima, S. Krinsky, J. Rose, L.-H. Yu
    BNL, Upton, Long Island, New York
  
 

Booster extraction presents a number of problems that include strengths and waveforms of the pulsed magnets and design of the vacuum chamber. Instabilities in the booster extraction may compromise the extracted beam quality deteriorating value of high-performance injector design. Here we discuss requirements and tolerances for the extraction system components and methods of increasing its performance.

  
TUPD084 High Current Limitations for the NSLS-II Booster 2108
 
  • A. Blednykh, W.X. Cheng, R.P. Fliller, Y. Kawashima, J. Rose, T.V. Shaftan, L.-H. Yu
    BNL, Upton, Long Island, New York
  
 

In this paper, we present an overview of the impact of collective effects upon the performance of the NSLS-II booster.

  
WEPEA078 Instabilities Related with RF Cavity in the Booster Synchrotron for NSLS-II 2669
 
  • Y. Kawashima, J. Cupolo, H. Ma, J. Oliva, J. Rose, R. Sikora, M. Yeddulla
    BNL, Upton, Long Island, New York
  
 

The booster synchrotron for NSLS-II accepts beam with 200 MeV from a linac and raises its energy up to 3 GeV. In order to raise beam energy up to 3 GeV, a 7-cell PETRA cavity is installed. Beam instabilities related with the cavity are discussed. In particular, in order to avoid coupled-bunch instability, we consider that cooling water temperature for the cavity should be changed to shift frequencies of higher order modes (HOM) to avoid beam revolution lines. To obtain the relation between the temperature dependence of amount of frequency shift in each HOM and cavity body temperature, we carried out the measurement by changing cavity body temperature. From the measurement data, we calculate the required temperature variation. We summarize the results and describe the system design.

  
WEPEA082 Status of the NSLS-II Injection System Development 2672
 
  • T.V. Shaftan, A. Blednykh, W.R. Casey, L.R. Dalesio, R. Faussete, M.J. Ferreira, R.P. Fliller, G.S. Fries, G. Ganetis, W. Guo, R. Heese, H.-C. Hseuh, Y. Hu, P.K. Job, E.D. Johnson, Y. Kawashima, B.N. Kosciuk, S. Kowalski, S. Krinsky, Y. Li, H. Ma, R. Meier, S. Ozaki, D. Padrazo, B. Parker, I. Pinayev, M. Rehak, J. Rose, S. Sharma, O. Singh, P. Singh, J. Skaritka, C.J. Spataro, G.M. Wang, F.J. Willeke, L.-H. Yu
    BNL, Upton, Long Island, New York
  
 

We discuss status and plans of development of the NSLS-II injector. The injector consists of 200 MeV linac, 3-GeV booster, transport lines and injection straight section. The system design is now nearly completed and the injector development is in the procurement phase. The injector commissioning is planned to take place in 2012.