Author: Elmore, B.
Paper Title Page
TUIOC01
 Review on EP Advances Worldwide  
 
  • F. Furuta, B. Elmore, G.H. Hoffstaetter, M. Liepe
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  Electro-Polishing is now applying on SRF Nb cavity world widely as baseline surface treatment technique in many projects, such as ILC, XFEL, JlabUpgrade, and so on. I will give some review on EP as titled, report the achievements and the newest R&D topics of EP.  
slides icon Slides TUIOC01 [20.715 MB]  
 
TUP048 Preparations and VT Results of ERL7-cell at Cornell 521
 
  • F. Furuta, B. Bullock, R.G. Eichhorn, B. Elmore, A. Ganshin, G.M. Ge, G.H. Hoffstaetter, J.J. Kaufman, M. Liepe, J. Sears
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  We have fabricated 7 ERL 7-cell cavities for Cornell ERL project. 4 nu-stiffened and 3-stiffened cavities have been fabricated in house so far. Specification values of our 7-cell is 16.2MV/m with Qo of 2.0·1010 at 1.8K. In this report, we will describe our surface treatments recipe which is based on BCP and the results of vertical tests of these 7-cell cavities.  
 
TUP049 Cornell VEP Update, VT Results and R&D on Nb Coupon 524
 
  • F. Furuta, B. Elmore, G.H. Hoffstaetter, D.K. Krebs, M. Liepe
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  Cornell's SRF group have been led development of Vertical Electro-Polishing(VEP) on SRF Nb Cavity. We have done many VEP on singel-/multi-cell cavities. We also have started VEP'ed Nb coupon surface analysis based on surface roughness measurement. In this report, we will describe our status of VEP R&D, the results of VEP'ed cavity vertical testing, and fundamental study on VEP using Nb coupons.  
 
THIOB02 High Q Cavities for the Cornell ERL Main Linac 844
 
  • R.G. Eichhorn, B. Bullock, B. Clasby, B. Elmore, F. Furuta, A. Ganshin, G.M. Ge, D. Gonnella, D.L. Hall, Y. He, K.M.V. Ho, G.H. Hoffstaetter, J.J. Kaufman, M. Liepe, T.I. O'Connel, S. Posen, P. Quigley, J. Sears, V.D. Shemelin, E.N. Smith, V. Veshcherevich
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  While SRF research for linear colliders was focused on achieving high gradients, Cornell’s proposal for an energy recovery linac (ERL) demanded for low cw losses. Starting several years ago, a high-Q R&D phase was launched that led to remarkable results recently: A fully dressed cavity (7 cells, 1.3 GHz) with side-mounted input coupler and beamline HOM absorbers achieved a Q of 3.5·1010 ((16 MV/m, 1.8 K). This talk will review the staged approach we have chosen in testing a single cavity in a horizontal short cryomodule (HTC), report results on each step and conclude on our findings about preserving high Q from vertical testing. We also discuss the production of six additional cavities as we progress toward constructing a full 6-cavity cryomodule as a prototype for Cornell’s main linac module  
slides icon Slides THIOB02 [8.378 MB]  
 
THP007 Cornell's ERL Cavity Production 909
 
  • R.G. Eichhorn, B. Bullock, B. Clasby, B. Elmore, F. Furuta, G.H. Hoffstaetter, J.J. Kaufman, B.M. Kilpatrick, J. Sears, V.D. Shemelin
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  • T. Kürzeder
    TU Darmstadt, Darmstadt, Germany
  
  The phase 1 R&D program launched in preparation to building a 5 GeV Energy Recovery Linac (ERL) at Cornell, a full main linac cryomodule is currently built, housing six 7-cell cavities. In order to control the beam break-up limit, the shape of the cavity was highly optimized and stringent tolerances on the cavity production were targeted. We will report on the details of the cavity production, the accuracy of the cups forming the individual cells, the trimming procedure for the dumbbells, the cavity tuning and final accuracy of the cavity concerning field flatness, resonant frequency and overall length within this small series production.  
 
THP008
 High Voltage Cavity R&D at Cornell, RE and ICHIRO  
 
  • F. Furuta, B. Elmore, A. Ganshin, G.M. Ge, G.H. Hoffstaetter, M. Liepe
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  We have been investigated 1.3GHz high gradient SRF Nb cavity with shape of low Hpk/Eacc, such as re-entrant(RE) and KEK low-loss (ICHIRO) shapes. We have single-/multi-cell RE cavities and ICHIRO single-cell cavities at Cornell. We have processed those cavities based on buffered chemical-polishing(BCP), vertical electro-polishing(VEP), and centrifugal barrel-polsihing(CBP). In this paper, we will report the details of processes and the results of vertical tests of these cavities.