Author: Wu, Q.
Paper Title Page
WEPWO047 A Double Quarter-Wave Deflecting Cavity for the LHC 2408
 
  • R. Calaga
    CERN, Geneva, Switzerland
  • S.A. Belomestnykh, I. Ben-Zvi, J. Skaritka, Q. Wu, B. P. Xiao
    BNL, Upton, Long Island, New York, USA
  
  Funding: The HiLumi LHC Design Study (a sub-system of HL-LHC) is cofunded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404
An asym­met­ric quar­ter wave de­flect­ing cav­ity at 400 MHz for crab cross­ing in the LHC was al­ready pro­posed in 2011. Due to im­proved can­cel­la­tion of on-axis lon­gi­tu­di­nal field and the higher order com­po­nents of the de­flect­ing field, a sym­met­ric ver­sion is now con­sid­ered as the base­line for the quar­ter wave geom­e­try. Rel­e­vant RF prop­er­ties of the sym­met­ric cav­ity are com­pared to the orig­i­nal asym­met­ric cav­ity. Some as­pects of input cou­pler de­sign, higher order modes, mul­ti­pact­ing and fre­quency tun­ing are also ad­dressed. 		 
 
WEPWO050 Mechanical Study of 400 MHz Double Quarter Wave Crab Cavity for LHC Luminosity Upgrade 2417
 
  • B. P. Xiao, S.A. Belomestnykh, I. Ben-Zvi, J. Skaritka, Q. Wu
    BNL, Upton, Long Island, New York, USA
  • L. Alberty Vieira, R. Calaga
    CERN, Geneva, Switzerland
  • T.L. Grimm
    Niowave, Inc., Lansing, Michigan, USA
  
  A pro­to­type dou­ble quar­ter wave crab cav­ity was de­signed for the Large Hadron Col­lider lu­mi­nos­ity up­grade. A fi­nite el­e­ment model is used to sim­u­late the me­chan­i­cal prop­er­ties of the crab cav­ity. The re­sults are pre­sented and a re­in­force­ment con­cept is pro­posed to meet the safety re­quire­ments. The re­in­force­ment com­po­nents, as well as the cav­ity, are presently being fab­ri­cated at Niowave Inc.