Author: Ostroumov, P.N.
Paper Title Page
WEPRI050 Development and Test Results of a Quasi-waveguide Multi-cell Resonator 2595
 
  • Z.A. Conway, A. Barcikowski, S.M. Gerbick, M. Kedzie, M.P. Kelly, J.S. Kerby, S.H. Kim, S.V. Kutsaev, R.C. Murphy, A. Nassiri, P.N. Ostroumov, T. Reid, T.L. Smith, A. Zholents
    ANL, Argonne, Illinois, USA
 
  Funding: Work supported by the U.S. Department of Energy, Offices of Nuclear Physics and Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
This paper reports the successful fabrication and test results of a novel 2815 MHz superconducting deflecting cavity operating in a TE-mode trapped in a quasi-waveguide structure with extremely high shunt impedance. The waveguide structure of this cavity allows for the free propagation of all higher order modes (HOMs) out of the cavity via the beam ports, eliminating the need for HOM dampers inside the cavity when operated with high beam current. The absence of HOM dampers greatly simplifies the cavity fabrication and operation at cryogenic temperatures. This cavity with its high shunt impedance is ideal for the spatial rotation of short bunches in a small physical space, a requirement for the generation of sub-picosecond short pulse x-rays in electron storage rings or luminosity upgrades of colliders. Results characterizing the fabrication accuracy and precision, the RF performance at 2 K, and frequency tuning considerations will be discussed here.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI050  
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THPME036 ECOS-LINCE: A High Intensity Multi-ion Superconducting Linac for Nuclear Structure and Reactions 3301
 
  • I. Martel, L. Acosta, R. Carrasco Dominguez, J.A. Dueñas, A.K. Orduz, A. Peregrin, J. Prieto-Thomas, J. Sanchez-Segovia, A.C.C. Villari
    University of Huelva, Huelva, Spain
  • F. Azaiez
    IPN, Orsay, France
  • G. De Angelis
    INFN/LNL, Legnaro (PD), Italy
  • M. Lewitowicz
    GANIL, Caen, France
  • A. Maj
    IFJ-PAN, Kraków, Poland
  • P.N. Ostroumov
    ANL, Argonne, Illinois, USA
  • A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
 
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
During the past ten years, ECOS working group and users strongly supported the construction of a dedicated high-intensity stable-ion-beam facility in Europe, with energies at and above the Coulomb barrier as part of the Long-Range Plan of the Nuclear-Physics community. LINCE will be a multi-user facility dedicated to ECOS science: fundamental physics, astrophysics, nuclear structure and reaction dynamics. Applied research is foreseen in the fields of medical physics, aerospace and material sciences with energetic heavy ions. The facility will produce a wide range of ions, from protons (45 MeV) up to Uranium (8.5 MeV/u) with 1mA maximum beam intensity. A very compact linac has been designed by using a HV platform with a double-frequency ECR ion source, multi-harmonic buncher, an innovative CW RFQ design (1 ≤A/Q ≤ 7) and 26 accelerating cavities made of bulk niobium (β = 0.045, 0.077 and 0.15) working at 72.75 and 109.125 MHz. This article gives an outline of the accelerator complex from the ion source to the experimental areas, and presents its research potential and the relevant physics instrumentation.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME036  
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THPME037 Development of a 72.75 MHz RFQ for the LINCE Accelerator Complex 3304
SUSPSNE039   use link to see paper's listing under its alternate paper code  
 
  • A.K. Orduz, C. Bonțoiu, I. Martel, A.C.C. Villari
    University of Huelva, Huelva, Spain
  • A. Garbayo
    AVS, Elgoibar, Spain
  • P.N. Ostroumov
    ANL, Argonne, Illinois, USA
  • A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
 
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
Low-energy acceleration for the LINCE project [1] will be achieved using a 72.75 MHz normal conducting four vanes RFQ designed to give a 460 keV/u boost for A/Q = 7 ions in about 5 m. The vanes are modeled to accommodate windows for a clear separation of the RFQ modes and easy fitting to an octagonal resonance chamber. This article presents the main numerical results of the radio-frequency modeling and computational fluid dynamics (CFD). Particle tracking studies optimized for bunching and acceleration are shown as well.
[1] I. Martel et al., “LINCE: A High Intensity Multi-ion Superconducting Linac for Nuclear Structure and Reactions”, IPAC’14, Dresden, Germany, June 2014, THPME036, These Proceedings.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME037  
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