Author: Holmes, D.
Paper Title Page
MOPO004 Commissioning of the SRF Booster Cavity for LEReC 40
 
  • W. Xu, A.V. Fedotov, T. Hayes, D. Holmes, G.T. McIntyre, K. Mernick, S.K. Seberg, F. Severino, K.S. Smith, R. Than, Q. Wu, B. P. Xiao, T. Xin, A. Zaltsman
    BNL, Upton, Long Island, New York, USA
  
  Funding: This work is supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. DOE.
One im­por­tant com­po­nent for LEReC pro­ject is a 704 MHz booster cav­ity, which was mod­i­fied from the BNL ERL 704 MHz SRF gun cav­ity. The major mod­i­fi­ca­tions in­clude con­vert­ing the up­stream cath­ode trans­porta­tion to a proper beam pipe, adding a HOM coax­ial line HOM damper to the down­stream, re­tract­ing FPC in­ser­tions, and im­prove­ment of cry­omod­ule lay­out. In the past one and half year, tremen­dous work was com­pleted: the cav­ity was mod­i­fied and tested ver­ti­cally, FPC were con­di­tioned, and HOM damper were de­signed and con­di­tioned, cry­omod­ule was re-as­sem­bled. The booster cav­ity cry­omod­ule was suc­cess­fully com­mis­sioned in mid Oc­to­ber, and it was moved to LEReC lo­ca­tion at RHIC tun­nel 2 O’clock early No­vem­ber. This paper will re­port the con­fig­u­ra­tion of the new cry­omod­ule and its com­mis­sion­ing re­sults. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO004  
About • paper received ※ 22 August 2018       paper accepted ※ 22 September 2018       issue date ※ 18 January 2019  
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THPO006 Status of 650 MHz SRF Cavity for eRHIC SRF Linac 688
 
  • W. Xu, I. Ben-Zvi, Y. Gao, D. Holmes, P. Kolb, G.T. McIntyre, R. Porqueddu, K.S. Smith, F.J. Willeke, Q. Wu, A. Zaltsman
    BNL, Upton, Long Island, New York, USA
  
  Funding: This work is supported by LDRD program of Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. DOE.
A 5-cell 650 MHz SRF cav­ity was de­signed for eRHIC SRF linac. One Cu cav­ity was fab­ri­cated for HOM damp­ing study, and one Nb cav­ity was fab­ri­cated for SRF stud­ies. Through var­i­ous post-pro­cess­ing recipes and ver­ti­cal tests, the SRF study in­cludes high Q-value study for ERL SRF linac and high gra­di­ent study for re­cir­cu­lat­ing linac. This paper re­ports the HOM damp­ing mea­sure­ment on the Cu cav­ity and pre­lim­i­nary ver­ti­cal test re­sults. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO006  
About • paper received ※ 22 August 2018       paper accepted ※ 08 October 2018       issue date ※ 18 January 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)